General Motors Certified Technician Certification — Questions and Answers

Question 1: What is typically included in the GM Approved Parts certification process?

Testing for performance, durability, and safety specific to GM vehicles (Correct answer)
Only a basic visual inspection
Price comparisons with non-GM parts
Aesthetic appeal review

Correct answer: Testing for performance, durability, and safety specific to GM vehicles

The GM Approved Parts certification process typically includes rigorous testing for performance, durability, and safety specific to GM vehicles. These tests ensure that the parts meet the same high standards as the original components installed in new vehicles. This thorough evaluation guarantees that approved parts will function reliably and safely within the vehicle's system.

Question 2: On GM vehicles equipped with rear HVAC, where is the secondary expansion device typically located?

In the trunk-mounted auxiliary compressor
In the engine compartment next to the primary TXV
At the rear HVAC module under the rear cargo area or rear of the passenger compartment (Correct answer)
Inside the front evaporator housing

Correct answer: At the rear HVAC module under the rear cargo area or rear of the passenger compartment

The rear HVAC module contains its own expansion device (orifice tube or TXV) located within the rear heating/cooling unit, separate from the front system's expansion device.

Question 3: Why might a customer prefer GM Authorized Service over other service options?

GM Authorized Service offers exclusive extended warranties on repairs
GM Authorized Service is the cheapest option
GM Authorized Service centers only work on new GM vehicles
GM Authorized technicians receive direct support and updates from GM (Correct answer)

Correct answer: GM Authorized technicians receive direct support and updates from GM

Customers often prefer GM Authorized Service because these technicians receive direct support and updates from GM. This means they have access to the latest technical information, diagnostic software, and repair bulletins straight from the manufacturer. This direct line to GM ensures that their vehicles are serviced with the most current and accurate methods, leading to reliable repairs.

Question 4: What is one way a GM-accredited dealership is expected to contribute to GM’s brand reputation?

By maintaining a clean, professional environment and following GM’s brand guidelines (Correct answer)
By offering non-GM branded vehicles
By reducing service costs
By advertising exclusively online

Correct answer: By maintaining a clean, professional environment and following GM’s brand guidelines

A GM-accredited dealership is expected to contribute to GM’s brand reputation by maintaining a clean, professional environment and strictly following GM’s brand guidelines. The dealership's appearance and adherence to brand standards directly reflect on the manufacturer's image. A professional and consistent presentation reinforces the quality and reliability associated with the General Motors brand.

Question 5: What is the significance of documentation in Transmission and Drivetrain?

It provides a record for accountability, quality assurance, and legal compliance (Correct answer)
Only management needs to document
Documentation is unnecessary busy work
Only required during audits

Correct answer: It provides a record for accountability, quality assurance, and legal compliance

Proper documentation supports accountability, enables quality review, and satisfies legal requirements.

Question 6: A technician notices that an approved GM fuel injector part number is on a 'Do Not Use' service bulletin. The correct action is:

Install it anyway since it is still an approved GM number
Use an aftermarket injector with similar specifications
Contact the customer for authorization to proceed with the flagged part
Check the bulletin for the superseding approved part number and use that instead (Correct answer)

Correct answer: Check the bulletin for the superseding approved part number and use that instead

'Do Not Use' bulletins indicate a known issue with a part; the technician must find and use the corrected superseding approved part number.

Question 7: Which approach is most effective for problem-solving in Transmission and Drivetrain?

Random trial and error
Always asking someone else
Ignoring the problem until it resolves itself
Systematic analysis followed by evidence-based decision making (Correct answer)

Correct answer: Systematic analysis followed by evidence-based decision making

Systematic, evidence-based approaches lead to more reliable solutions than ad hoc methods.

Question 8: What is the most important foundational concept in Electrical Systems?

Only following instructions from supervisors
Ignoring established guidelines
Understanding core principles and their practical application in Electrical Systems (Correct answer)
Memorizing all rules without understanding

Correct answer: Understanding core principles and their practical application in Electrical Systems

Core principles provide the foundation for all decision-making and practice in Electrical Systems.

Question 9: When a GM vehicle's ECM requires reprogramming as part of a warranty repair, what must be documented on the Repair Order?

Only the total labor time for the programming operation
The customer's Wi-Fi password used during the update
Only the symptom and parts replaced
The old and new software calibration numbers (before/after file IDs) (Correct answer)

Correct answer: The old and new software calibration numbers (before/after file IDs)

GM warranty policy requires documenting both the previous and updated software/calibration file IDs to create an auditable record of the programming event.

Question 10: A customer asks whether a GM CPO purchase protects them from buying a flood-damaged vehicle. What is the best response?

CPO has no flood protection
Flood damage is acceptable if repaired
The GM CPO inspection and vehicle history requirement specifically screen out flood-damage disclosures (Correct answer)
Only comprehensive insurance covers flood damage

Correct answer: The GM CPO inspection and vehicle history requirement specifically screen out flood-damage disclosures

The vehicle history report requirement and GM CPO inspection process are designed to identify and exclude vehicles with disclosed flood or water damage.

Question 11: What does 'remaining factory warranty' mean in the context of a GM CPO vehicle?

Unused portion of the original new-vehicle warranty that still applies (Correct answer)
A new warranty issued by the dealer
A warranty purchased by the customer separately
GM's extended service contract

Correct answer: Unused portion of the original new-vehicle warranty that still applies

If a GM CPO vehicle is still within its original factory warranty period, that coverage remains in effect in addition to the CPO warranty overlay.

Question 12: Why might a customer choose a GM Approved Pre-Owned vehicle over a standard used car?

GM Approved Pre-Owned vehicles come in more color options
They are guaranteed to have only one previous owner
They are significantly less expensive than non-certified used vehicles
They undergo a multi-point inspection and are reconditioned to GM standards (Correct answer)

Correct answer: They undergo a multi-point inspection and are reconditioned to GM standards

Customers often choose a GM Approved Pre-Owned vehicle over a standard used car because they undergo a rigorous multi-point inspection and are reconditioned to GM standards. This comprehensive process ensures the vehicle's reliability, safety, and overall quality, providing a higher level of assurance than a typical used car purchase. The manufacturer's backing adds significant value and trust.

Question 13: A dealer wishes to add the Buick brand to its existing Chevrolet dealership. What must the dealer demonstrate to receive accreditation for the new brand?

Meeting separate brand-specific facility, staffing, and training standards for Buick (Correct answer)
Achieving top-quartile Chevrolet CSI scores for two consecutive quarters
Having at least 10 years of Chevrolet dealer experience
Simply paying an additional franchise fee to GM

Correct answer: Meeting separate brand-specific facility, staffing, and training standards for Buick

Each GM brand has its own set of facility, personnel, and training requirements that a dealer must satisfy to receive authorization to represent that brand.

Question 14: How does technology impact modern practices in Electrical Systems?

Technology replaces all human judgment
Technology is only useful for record keeping
Technology improves efficiency, accuracy, and access to information while requiring new skills (Correct answer)
Technology has no impact on this field

Correct answer: Technology improves efficiency, accuracy, and access to information while requiring new skills

Technology enhances capabilities while also requiring practitioners to develop new competencies.

Question 15: What does the 'GM OE' label on a replacement part signify?

The part is only for older/classic GM vehicles
The part is an economy-grade alternative
The part meets original equipment specifications and is approved by GM (Correct answer)
The part was manufactured overseas

Correct answer: The part meets original equipment specifications and is approved by GM

'GM OE' indicates the part meets original equipment specifications and is approved for use in GM vehicles.

Question 16: What is the importance of communication skills in Electrical Systems?

Clear communication prevents errors, builds relationships, and ensures understanding among all parties (Correct answer)
Technical skills are sufficient without communication
Communication skills cannot be learned
Communication is only important for managers

Correct answer: Clear communication prevents errors, builds relationships, and ensures understanding among all parties

Effective communication is essential for coordination, error prevention, and stakeholder relationships.

Question 17: Under GM's Service Advisor training requirements, which program must advisors complete to maintain authorized dealer status?

GM Dealer Academy Service Advisor curriculum via GM Training (Correct answer)
SAE International customer service program
Any approved third-party sales training course
ASE Service Consultant Certification only

Correct answer: GM Dealer Academy Service Advisor curriculum via GM Training

GM requires service advisors at authorized dealerships to complete the GM Dealer Academy's designated service advisor training to maintain dealer certification.

Question 18: A customer wants to know if a GM CPO vehicle qualifies for special financing rates. What is the correct answer?

Only new vehicles get special financing from GM Financial
CPO vehicles never qualify for special rates
GM Financial may offer special APR for CPO vehicles (Correct answer)
CPO financing rates are set by the federal government

Correct answer: GM Financial may offer special APR for CPO vehicles

GM Financial frequently offers special financing rates on GM CPO vehicles, similar to incentives offered on new vehicles.

Question 19: How many model years back does GM Certified Pre-Owned eligibility typically extend from the current calendar year?

7 years
3 years
10 years
5 years (Correct answer)

Correct answer: 5 years

GM CPO vehicles must generally be within 5 model years of the current year to qualify.

Question 20: Which of the following is a characteristic of GM's 'Remanufactured' parts classification?

Used cores rebuilt to original GM performance specifications (Correct answer)
New raw materials, assembled to OEM specs
Parts manufactured by a GM-approved third party using new materials
Surplus new parts sold at a discount

Correct answer: Used cores rebuilt to original GM performance specifications

GM Remanufactured parts use serviceable cores that are rebuilt and tested to meet original GM performance specifications.

Question 21: Which of the following best describes the purpose of a GM Pre-Delivery Inspection (PDI)?

To install aftermarket accessories
To perform emissions testing
To verify a new vehicle meets GM quality standards before customer delivery (Correct answer)
To assess trade-in vehicle value

Correct answer: To verify a new vehicle meets GM quality standards before customer delivery

The PDI ensures every new GM vehicle is inspected and prepared to factory standards prior to being delivered to the customer.

Question 22: What quality metrics are most important in Electrical Systems?

Only financial metrics
No metrics are needed
Only speed of completion
Measurable outcomes, process compliance, and stakeholder satisfaction (Correct answer)

Correct answer: Measurable outcomes, process compliance, and stakeholder satisfaction

Quality in Electrical Systems is measured through multiple dimensions including outcomes, processes, and satisfaction.

Question 23: A dealership wants to add a used-car sales lot across the street from its main location. What must it do first regarding GM accreditation?

Obtain GM approval before establishing the additional facility (Correct answer)
Apply for a new and separate dealer agreement
Simply notify GM within 30 days of opening
Hire a minimum of five additional GM-trained sales staff

Correct answer: Obtain GM approval before establishing the additional facility

GM requires prior approval before a dealer establishes any additional sales facility to ensure it meets brand and territory standards.

Question 24: A technician completing a GM warranty repair must perform a final quality control check called:

Quality Gate Audit (QGA)
Repair Validation Sign-Off (RVS)
Post-Repair Verification (PRV) (Correct answer)
Final Inspection Review (FIR)

Correct answer: Post-Repair Verification (PRV)

Post-Repair Verification (PRV) confirms the original customer complaint is resolved and no new issues were introduced during the repair.

Question 25: How should a GM technician verify the correct refrigerant charge after an AC system recharge?

By feel — if air from vents is cold, charge is correct
By measuring high and low side pressures and comparing to temperature-pressure charts (Correct answer)
By weighing the refrigerant can before and after
By checking only the sight glass on the receiver-drier

Correct answer: By measuring high and low side pressures and comparing to temperature-pressure charts

Proper charge verification requires measuring both high and low side pressures with a manifold gauge set and comparing readings to the temperature-pressure chart for the specific refrigerant.

Question 26: After a GM vehicle is involved in an airbag deployment, which components must always be replaced regardless of visible damage?

All airbag modules, seatbelt pretensioners, and the SDM/ACM (Correct answer)
The steering wheel and instrument cluster only
Just the seatbelt pretensioners
Only the deployed airbag modules

Correct answer: All airbag modules, seatbelt pretensioners, and the SDM/ACM

Following a deployment event, GM requires replacement of all deployed airbag modules, seatbelt pretensioners, and the Sensing and Diagnostic Module (SDM) as a complete system.

Question 27: Which approach is most effective for problem-solving in Electrical Systems?

Random trial and error
Ignoring the problem until it resolves itself
Systematic analysis followed by evidence-based decision making (Correct answer)
Always asking someone else

Correct answer: Systematic analysis followed by evidence-based decision making

Systematic, evidence-based approaches lead to more reliable solutions than ad hoc methods.

Question 28: What tool might GM Authorized technicians use that independent repair shops may not have access to?

Basic vehicle lifts
Oil filter wrenches
General hand tools
Diagnostic scanners exclusive to GM vehicles (Correct answer)

Correct answer: Diagnostic scanners exclusive to GM vehicles

GM Authorized technicians often have access to specialized diagnostic scanners that are exclusive to GM vehicles. These proprietary tools are essential for accurately diagnosing complex electronic systems and specific vehicle modules designed by GM. Independent repair shops typically lack access to these manufacturer-specific diagnostic capabilities, which can limit their ability to perform comprehensive repairs on GM vehicles.

Question 29: How does technology impact modern practices in Engine Systems?

Technology has no impact on this field
Technology improves efficiency, accuracy, and access to information while requiring new skills (Correct answer)
Technology is only useful for record keeping
Technology replaces all human judgment

Correct answer: Technology improves efficiency, accuracy, and access to information while requiring new skills

Technology enhances capabilities while also requiring practitioners to develop new competencies.

Question 30: How should risk be managed in Transmission and Drivetrain?

Risk management is not necessary
By ignoring potential problems
By avoiding all risk entirely
Through identification, assessment, mitigation strategies, and ongoing monitoring of potential risks (Correct answer)

Correct answer: Through identification, assessment, mitigation strategies, and ongoing monitoring of potential risks

Effective risk management involves a systematic process of identifying, evaluating, and addressing potential threats.

Question 31: When calibrating a GM front-facing camera after windshield replacement, which procedure is required?

Recalibration is performed automatically the first time rain is detected
No calibration is needed after windshield replacement
Static target calibration in a controlled environment (Correct answer)
Dynamic calibration only at highway speeds

Correct answer: Static target calibration in a controlled environment

After windshield replacement, a static target calibration using specified alignment targets must be performed to ensure the forward camera is accurately aimed.

Question 32: What role does continuing education play in Electrical Systems?

Only beneficial for management
Keeping practitioners current with evolving best practices and new developments (Correct answer)
Only required for new practitioners
It is optional and rarely helpful

Correct answer: Keeping practitioners current with evolving best practices and new developments

Continuing education ensures practitioners stay current with advances in their field.

Question 33: Which GM system is used by authorized dealerships to access technical service bulletins (TSBs)?

ServiceMaxx
DealerTrack
GM Global Connect (GWM) (Correct answer)
OnStar Connect

Correct answer: GM Global Connect (GWM)

GM Global Connect (GWM) is the primary portal authorized dealers use to access TSBs, warranty information, and service procedures.

Question 34: What is the primary purpose of the GM Parts Traceability system?

To manage shipping logistics for parts orders
To track dealer inventory levels
To calculate parts pricing automatically
To verify part authenticity and ensure approved parts are used in repairs (Correct answer)

Correct answer: To verify part authenticity and ensure approved parts are used in repairs

GM's traceability system verifies that parts used in repairs are authentic and approved, protecting warranty integrity.

Question 35: What is the purpose of GM's Dealer Technology Requirements within the accreditation framework?

To restrict dealers from using third-party marketing software
To mandate specific brands of office computers for accounting
To ensure dealers use approved DMS and communication platforms integrated with GM systems (Correct answer)
To require dealers to build their own mobile apps

Correct answer: To ensure dealers use approved DMS and communication platforms integrated with GM systems

GM's technology requirements ensure dealers use compatible dealer management systems that connect seamlessly with GM's ordering, inventory, and customer data platforms.

Question 36: How should ethical dilemmas be handled in Electrical Systems?

Make decisions based solely on personal preference
Always choose the cheapest option
Ignore ethical concerns
Follow established ethical guidelines, consult with supervisors, and prioritize stakeholder welfare (Correct answer)

Correct answer: Follow established ethical guidelines, consult with supervisors, and prioritize stakeholder welfare

Ethical decision-making requires following professional guidelines and prioritizing the welfare of all stakeholders.

Question 37: In GM's accreditation framework, what does 'market representation planning' primarily determine?

Which GM brands each dealer is permitted to sell
Where GM authorizes dealers to be located based on customer demand in a geographic area (Correct answer)
The advertising budget allocated to each dealer
The order in which dealers receive new model launches

Correct answer: Where GM authorizes dealers to be located based on customer demand in a geographic area

Market representation planning is GM's process for determining optimal dealer locations to ensure adequate coverage and competition within a market area.

Question 38: What is the function of GM's Lane Keep Assist (LKA) system?

Alerts the driver with a vibration when drifting and can apply corrective steering torque (Correct answer)
Only provides an audible alert with no steering intervention
Automatically steers the vehicle at all speeds
Locks the steering wheel if lane departure is detected

Correct answer: Alerts the driver with a vibration when drifting and can apply corrective steering torque

Lane Keep Assist provides a steering wheel vibration alert when unintentional lane departure is detected and can apply gentle corrective steering torque to guide the vehicle back.

Question 39: What quality metrics are most important in Engine Systems?

No metrics are needed
Only financial metrics
Measurable outcomes, process compliance, and stakeholder satisfaction (Correct answer)
Only speed of completion

Correct answer: Measurable outcomes, process compliance, and stakeholder satisfaction

Quality in Engine Systems is measured through multiple dimensions including outcomes, processes, and satisfaction.

Question 40: What is the significance of documentation in Electrical Systems?

It provides a record for accountability, quality assurance, and legal compliance (Correct answer)
Documentation is unnecessary busy work
Only management needs to document
Only required during audits

Correct answer: It provides a record for accountability, quality assurance, and legal compliance

Proper documentation supports accountability, enables quality review, and satisfies legal requirements.

Question 41: What makes a professional competent in Electrical Systems?

Only formal education matters
Only certifications matter
A combination of education, practical experience, ongoing learning, and adherence to professional standards (Correct answer)
Only experience matters

Correct answer: A combination of education, practical experience, ongoing learning, and adherence to professional standards

Competence requires the integration of knowledge, skills, experience, and professional conduct.

Question 42: How should risk be managed in Electrical Systems?

By avoiding all risk entirely
Through identification, assessment, mitigation strategies, and ongoing monitoring of potential risks (Correct answer)
By ignoring potential problems
Risk management is not necessary

Correct answer: Through identification, assessment, mitigation strategies, and ongoing monitoring of potential risks

Effective risk management involves a systematic process of identifying, evaluating, and addressing potential threats.

Question 43: On GM vehicles with Exhaust Gas Recirculation (EGR), what is the primary emission the EGR system is designed to reduce?

Nitrogen oxides (NOx) (Correct answer)
Hydrocarbons (HC)
Carbon dioxide (CO2)
Carbon monoxide (CO)

Correct answer: Nitrogen oxides (NOx)

EGR reduces NOx emissions by reintroducing a metered amount of exhaust gas into the intake, lowering combustion temperatures that drive nitrogen and oxygen to combine into NOx.

Question 44: When performing an EVAP system small leak test on a GM vehicle, what leak rate defines a 'small leak' per OBD-II standards?

Greater than 0.040-inch diameter equivalent
0.020-inch diameter equivalent orifice leak (Correct answer)
Any detectable leak regardless of size
0.010-inch diameter equivalent orifice leak

Correct answer: 0.020-inch diameter equivalent orifice leak

OBD-II defines a small EVAP leak as one equivalent to a 0.020-inch (0.5 mm) diameter orifice, which the PCM can detect via fuel tank pressure change rate during the leak monitor.

Question 45: What pressure does GM specify for the high-pressure fuel pump outlet on a typical GDI engine during full-load operation?

200-500 psi
45-65 psi
1,000-2,900 psi (Correct answer)
3,500-5,000 psi

Correct answer: 1,000-2,900 psi

GM GDI high-pressure fuel systems operate at 1,000-2,900 psi (approximately 70-200 bar) at the fuel rail during full load to achieve fine atomization directly in the cylinder.

Question 46: What role does continuing education play in Engine Systems?

It is optional and rarely helpful
Only beneficial for management
Only required for new practitioners
Keeping practitioners current with evolving best practices and new developments (Correct answer)

Correct answer: Keeping practitioners current with evolving best practices and new developments

Continuing education ensures practitioners stay current with advances in their field.

Question 47: GM evaluates a dealer's 'Retail Sales Effectiveness' as part of accreditation reviews. What does this metric measure?

The percentage of vehicles a dealer sells through fleet versus retail channels
How well a dealer converts its vehicle allocation into actual retail sales relative to market opportunity (Correct answer)
The gross profit margin the dealer earns on each vehicle sold
The number of repeat buyers a dealer achieves in a 12-month period

Correct answer: How well a dealer converts its vehicle allocation into actual retail sales relative to market opportunity

Retail Sales Effectiveness compares a dealer's actual sales to the expected sales potential in its market, measuring how efficiently it converts its allocation and opportunity into results.

Question 48: How does GM Dealer Accreditation benefit customers?

Customers can return vehicles at any time without penalty
Accredited dealerships provide a high level of service quality and product knowledge (Correct answer)
Accredited dealerships offer exclusive models unavailable at other locations
Customers are guaranteed the lowest prices on all GM models

Correct answer: Accredited dealerships provide a high level of service quality and product knowledge

GM Dealer Accreditation directly benefits customers by ensuring that accredited dealerships provide a high level of service quality and product knowledge. Customers can expect well-trained staff who are experts on GM vehicles, offering accurate information and efficient service. This commitment to excellence enhances the overall customer experience, building trust and satisfaction.

Question 49: A technician finds that a GM approved part number has been superseded. What is the correct next step?

Use the superseding part number, which is the current approved replacement (Correct answer)
Order the old part number from a third-party supplier
Install a similar aftermarket part and document the substitution
Decline the repair until the original part number is available

Correct answer: Use the superseding part number, which is the current approved replacement

A superseded part number means GM has updated the approved part; the technician should order and install the current superseding part number.

Question 50: A GM customer reports musty odor from the vents only when the AC first turns on. What is the most likely cause and recommended fix?

Failed blend door actuator allowing outside air — replace actuator
Refrigerant leak contaminating cabin air — recover and recharge system
Heater core leaking coolant — pressure test cooling system
Microbial growth on the evaporator core — clean with approved HVAC disinfectant and replace cabin air filter (Correct answer)

Correct answer: Microbial growth on the evaporator core — clean with approved HVAC disinfectant and replace cabin air filter

Musty odor on AC startup is caused by mold and bacteria growth on the damp evaporator core surface; the repair involves applying an approved HVAC disinfectant treatment and replacing the cabin air filter.

Question 51: What is the primary purpose of the GM Direct Injection (GDI) fuel system compared to port fuel injection?

Use a carburetor to mix fuel and air before the intake
Inject fuel directly into the combustion chamber at high pressure for improved efficiency (Correct answer)
Deliver fuel at lower pressure to reduce pump wear
Inject fuel directly into the intake manifold at higher pressure

Correct answer: Inject fuel directly into the combustion chamber at high pressure for improved efficiency

GDI injects fuel directly into the combustion chamber at pressures up to 2,900 psi, enabling better fuel atomization, improved thermal efficiency, and reduced emissions.

Question 52: What is a significant difference between GM Approved Parts and aftermarket parts?

GM Approved Parts are specifically engineered for compatibility with GM vehicles (Correct answer)
Aftermarket parts are generally covered by GM’s warranty
Aftermarket parts are required to meet GM’s testing standards
GM Approved Parts are only used in new vehicles

Correct answer: GM Approved Parts are specifically engineered for compatibility with GM vehicles

GM Approved Parts are specifically engineered and rigorously tested by General Motors to meet the exact specifications and performance standards of their vehicles. This meticulous design ensures optimal fit, function, and safety, maintaining the vehicle's original integrity. Aftermarket parts, while often more affordable, may not undergo the same stringent testing or adhere to the precise engineering standards, potentially compromising vehicle performance or safety.

Question 53: What does the acronym ADAS stand for in GM vehicles?

Active Driver Alert Software
Automated Driving and Safety Systems
Advanced Driver Assistance Systems (Correct answer)
Adaptive Driving Assistance Suite

Correct answer: Advanced Driver Assistance Systems

ADAS stands for Advanced Driver Assistance Systems, which encompasses technologies like automatic emergency braking and lane keep assist.

Question 54: What is the primary purpose of standardized procedures in Electrical Systems?

To create unnecessary bureaucracy
To slow down work processes
To ensure consistency, safety, and quality across all practitioners (Correct answer)
To benefit only management

Correct answer: To ensure consistency, safety, and quality across all practitioners

Standardized procedures ensure that all practitioners deliver consistent, safe, and high-quality outcomes.

Question 55: Which of the following best explains why GM CPO vehicles are typically priced higher than non-certified comparable vehicles?

The price premium reflects inspection costs, warranty coverage, and added buyer confidence (Correct answer)
CPO vehicles have more miles
Dealers are required by law to charge more for CPO
CPO vehicles always have lower mileage

Correct answer: The price premium reflects inspection costs, warranty coverage, and added buyer confidence

The CPO premium covers reconditioning costs, warranty backing, and the peace of mind value that comes with manufacturer certification.

Question 56: A dealership receives a batch of GM-branded parts from an unfamiliar third-party distributor at a steep discount. The parts department manager should:

Verify the distributor is an authorized GM parts supplier before accepting (Correct answer)
Accept the shipment to reduce parts costs
Test one part before deciding whether to use the batch
Use the parts only for out-of-warranty repairs

Correct answer: Verify the distributor is an authorized GM parts supplier before accepting

GM parts should only be sourced from authorized distributors to prevent counterfeit parts from entering the service pipeline.

Question 57: How long must an authorized GM dealership retain completed Repair Orders for warranty audit purposes?

5 years (Correct answer)
6 months
10 years
1 year

Correct answer: 5 years

GM requires authorized dealers to retain warranty-related Repair Orders for a minimum of 5 years for potential audit review.

Question 58: What does a DTC B0084 code typically indicate on a GM vehicle?

ABS wheel speed sensor failure
Engine misfire on cylinder 4
Driver frontal airbag squib circuit fault (Correct answer)
Transmission pressure control solenoid error

Correct answer: Driver frontal airbag squib circuit fault

DTC B0084 is a GM SRS code indicating a fault in the driver frontal airbag squib (deployment) circuit, requiring SRS diagnostic procedures.

Question 59: What role does the GM CPO 3-day/150-mile exchange option play for a customer?

It lets the customer exchange for another CPO vehicle if not satisfied (Correct answer)
It allows the customer to return the car for a full refund
It extends the warranty by 3 days
It provides a free loaner vehicle for 3 days

Correct answer: It lets the customer exchange for another CPO vehicle if not satisfied

The exchange option gives CPO buyers up to 3 days or 150 miles to exchange the vehicle for another GM CPO vehicle if they are not satisfied.

Question 60: Under the GM CPO powertrain warranty, which of the following components is typically covered?

Wiper blades
Cabin air filter
Floor mats
Engine block and all internally lubricated parts (Correct answer)

Correct answer: Engine block and all internally lubricated parts

The powertrain warranty covers the engine, transmission, and drivetrain components including all internally lubricated parts.

Question 61: What are the key regulatory requirements affecting Engine Systems?

Only federal regulations apply
Regulations are optional guidelines
Compliance with applicable laws, industry standards, and licensing requirements specific to the field (Correct answer)
There are no regulations

Correct answer: Compliance with applicable laws, industry standards, and licensing requirements specific to the field

Practitioners must comply with all applicable regulations, which may include federal, state, and industry-specific requirements.

Question 62: What component in a GM HVAC system is responsible for removing moisture from the refrigerant circuit?

Evaporator core
Condenser
Receiver-drier or accumulator (Correct answer)
Expansion valve

Correct answer: Receiver-drier or accumulator

The receiver-drier (on TXV systems) or accumulator (on orifice tube systems) contains desiccant material that absorbs moisture from the refrigerant to prevent system damage.

Question 63: What makes a professional competent in Engine Systems?

A combination of education, practical experience, ongoing learning, and adherence to professional standards (Correct answer)
Only experience matters
Only formal education matters
Only certifications matter

Correct answer: A combination of education, practical experience, ongoing learning, and adherence to professional standards

Competence requires the integration of knowledge, skills, experience, and professional conduct.

Question 64: How does GM Authorized Service benefit the overall brand reputation of General Motors?

By ensuring consistent service quality across certified dealerships (Correct answer)
By making GM services more expensive
By increasing the use of non-GM parts
By reducing training requirements for technicians

Correct answer: By ensuring consistent service quality across certified dealerships

GM Authorized Service benefits the overall brand reputation of General Motors by ensuring consistent service quality across all certified dealerships. When customers receive reliable, expert service at any authorized location, it builds trust and reinforces GM's commitment to quality and customer satisfaction. This consistency helps maintain a positive brand image and encourages customer loyalty.

Question 65: Which federal regulation requires dealers to disclose known defects on used vehicles at the point of sale?

Magnuson-Moss Warranty Act
NHTSA Safety Standards Act
FTC Used Car Rule (Buyers Guide) (Correct answer)
Consumer Financial Protection Rule

Correct answer: FTC Used Car Rule (Buyers Guide)

The FTC Used Car Rule requires dealers to display a Buyers Guide disclosing warranty coverage and known defects on every used vehicle offered for sale.

Question 66: Which GM brand is NOT covered under the GM Certified Pre-Owned program?

Buick
Hummer (legacy H2) (Correct answer)
Cadillac
Chevrolet

Correct answer: Hummer (legacy H2)

The legacy Hummer brand (H2/H3) is discontinued and not included in the current GM CPO program; eligible brands are Chevrolet, Buick, GMC, and Cadillac.

Question 67: What is the purpose of the orifice tube in a GM AC system that uses this design?

Sense evaporator outlet temperature for compressor control
Compress refrigerant vapor before entering the condenser
Store excess refrigerant during low-demand operation
Meter refrigerant flow into the evaporator by reducing pressure (Correct answer)

Correct answer: Meter refrigerant flow into the evaporator by reducing pressure

The orifice tube is a fixed restriction that meters refrigerant flow into the evaporator, causing a pressure drop that allows the refrigerant to absorb heat and cool the cabin.

Question 68: What is the function of the Evaporative Emission Control (EVAP) system's purge valve on a GM vehicle?

Regulate fuel pressure between the pump and fuel rail
Control the flow of fuel vapors from the charcoal canister into the intake manifold (Correct answer)
Vent fuel tank pressure directly to atmosphere during refueling
Seal the fuel tank during EVAP leak detection tests

Correct answer: Control the flow of fuel vapors from the charcoal canister into the intake manifold

The EVAP purge valve opens under PCM command to allow stored fuel vapors from the charcoal canister to be drawn into the intake manifold and burned during engine operation.

Question 69: Which GM component cycles the AC compressor on and off to prevent evaporator freeze-up on systems without an expansion valve?

Accumulator desiccant pack
Pressure cycling switch (Correct answer)
Condenser pressure relief valve
Thermal expansion valve (TXV)

Correct answer: Pressure cycling switch

The pressure cycling switch monitors low-side pressure and cycles the compressor off when pressure drops too low (indicating near-freeze conditions) to prevent evaporator icing.

Question 70: When evacuating a GM AC system prior to recharging, what is the minimum vacuum level and hold time typically specified?

1,000 microns for 5 minutes is sufficient
Full vacuum is not required — just charge immediately after recovery
29 in-Hg with no hold time required
500 microns or below, held for at least 15–30 minutes (Correct answer)

Correct answer: 500 microns or below, held for at least 15–30 minutes

GM service procedures typically require pulling the system down to 500 microns or less and holding that vacuum for a minimum of 15–30 minutes to ensure all moisture is boiled off before recharging.

Question 71: What is the maximum amount a GM authorized dealer can charge a customer for a warranty deductible under a standard GM New Vehicle Limited Warranty?

$100 per visit
$200 per incident
$50 per visit
$0 — all warranty repairs are free to the customer (Correct answer)

Correct answer: $0 — all warranty repairs are free to the customer

GM's standard New Vehicle Limited Warranty covers defects in materials and workmanship at no charge to the customer, with no deductible.

Question 72: Which GM program requires authorized service departments to follow specific standards for customer waiting areas and service lane appearance?

Customer Experience (CX) Standards
GM 360 Standards
GM Certified Service Standards (Correct answer)
Service Lane Excellence Program

Correct answer: GM Certified Service Standards

GM Certified Service Standards outline facility, equipment, signage, and customer environment requirements for all authorized service departments.

Question 73: A GM dealer disputes a decision made by GM regarding its accreditation status. What formal process is available to the dealer?

Appealing directly to GM's CEO
Requesting arbitration through the National Automobile Dealers Association (NADA) only
Filing a lawsuit in federal court within 10 days
Utilizing the GM Dealer Assistance Process or applicable state motor vehicle franchise law dispute mechanisms (Correct answer)

Correct answer: Utilizing the GM Dealer Assistance Process or applicable state motor vehicle franchise law dispute mechanisms

Dealers have access to GM's internal Dealer Assistance Process and are protected by state franchise laws that provide formal dispute resolution mechanisms.

Question 74: What is the significance of GM's 'Market Area' designation in dealer accreditation planning?

It determines which GM social media accounts a dealer can access
It sets the exact ZIP codes where a dealer is legally permitted to deliver vehicles
It defines the geographic territory GM uses to assess a dealer's sales performance relative to competitive expectations (Correct answer)
It controls which GM employees are assigned to support the dealer

Correct answer: It defines the geographic territory GM uses to assess a dealer's sales performance relative to competitive expectations

A dealer's Market Area is the defined geography GM uses to benchmark expected sales performance against the market's potential and competitive landscape.

Question 75: GM's dealer accreditation standards require that all GM Certified Pre-Owned (CPO) vehicles pass a multi-point inspection. Who is authorized to perform this inspection?

Any state-licensed mechanic hired by the dealer
Third-party inspection companies approved by NADA
Only GM factory-certified technicians using GM's approved inspection checklist (Correct answer)
The dealership's sales manager using GM's digital inspection app

Correct answer: Only GM factory-certified technicians using GM's approved inspection checklist

Only GM factory-certified technicians are authorized to perform the CPO multi-point inspection, ensuring the process meets GM's quality standards.

Question 76: An ACDelco Advantage part differs from an ACDelco Professional part in that it is:

A value-line option for older or high-mileage vehicles (Correct answer)
Only available through independent retailers
Made from recycled OEM components
Designed for newer GM models only

Correct answer: A value-line option for older or high-mileage vehicles

ACDelco Advantage is a value-tier line suitable for older or high-mileage vehicles where premium OEM specs may be less critical.

Question 77: How does technology impact modern practices in Transmission and Drivetrain?

Technology has no impact on this field
Technology is only useful for record keeping
Technology improves efficiency, accuracy, and access to information while requiring new skills (Correct answer)
Technology replaces all human judgment

Correct answer: Technology improves efficiency, accuracy, and access to information while requiring new skills

Technology enhances capabilities while also requiring practitioners to develop new competencies.

Question 78: Which GM initiative focuses on improving the speed and efficiency of the vehicle intake and write-up process in the service lane?

GM Service Lane Advantage
Express Service Program (Correct answer)
Service Excellence Throughput Program
GM Fast Lane Initiative

Correct answer: Express Service Program

GM's Express Service Program is designed to reduce customer wait times for routine maintenance by streamlining write-up, multipoint inspection, and vehicle return.

Question 79: A GM CPO customer plans to move abroad one year after purchase. What happens to their CPO warranty coverage internationally?

The warranty transfers to the country's GM importer
Coverage automatically doubles internationally
Coverage continues worldwide with no restrictions
GM CPO warranty coverage is generally limited to the United States and Canada (Correct answer)

Correct answer: GM CPO warranty coverage is generally limited to the United States and Canada

GM CPO warranties are generally valid only within the United States and Canada, so coverage would not apply if the vehicle is relocated abroad.

Question 80: A GM dealer's service department fails to complete warranty repairs within GM's required time standards. What is the most direct accreditation impact?

Reduced reimbursement rates on future warranty claims
Mandatory enrollment in a service excellence remediation program (Correct answer)
Immediate suspension of new vehicle delivery
Loss of the GM Certified Pre-Owned program authorization

Correct answer: Mandatory enrollment in a service excellence remediation program

Dealers failing service time standards are typically enrolled in remediation or coaching programs to bring their operations up to GM's requirements.

Question 81: What tool might GM provide to accredited dealerships to enhance customer experience?

Special training in home delivery
Customer relationship management (CRM) systems tailored to GM standards (Correct answer)
Advanced financial software
GM-branded accessories for free giveaways

Correct answer: Customer relationship management (CRM) systems tailored to GM standards

GM often provides accredited dealerships with advanced tools like Customer Relationship Management (CRM) systems tailored to GM standards. These systems help dealerships manage customer interactions, track service history, and personalize communications, thereby enhancing the overall customer experience. By streamlining processes and improving customer engagement, these tools contribute to higher satisfaction and loyalty.

Question 82: Which document must accompany a GM CPO vehicle to verify its service and ownership history?

Dealer invoice
CARFAX or AutoCheck vehicle history report (Correct answer)
EPA fuel economy guide
Window sticker

Correct answer: CARFAX or AutoCheck vehicle history report

A vehicle history report is required as part of the GM CPO certification process to disclose past ownership and service records.

Question 83: What is the primary purpose of standardized procedures in Transmission and Drivetrain?

To benefit only management
To ensure consistency, safety, and quality across all practitioners (Correct answer)
To create unnecessary bureaucracy
To slow down work processes

Correct answer: To ensure consistency, safety, and quality across all practitioners

Standardized procedures ensure that all practitioners deliver consistent, safe, and high-quality outcomes.

Question 84: A GM CPO vehicle's check-engine light illuminates two weeks after purchase. Under the CPO warranty, what is the customer's best course of action?

Contact any GM dealership service department for a covered diagnosis and repair (Correct answer)
Wait until the next scheduled maintenance
Pay out-of-pocket since two weeks have passed
Only return to the selling dealer

Correct answer: Contact any GM dealership service department for a covered diagnosis and repair

GM CPO warranty repairs can be performed at any authorized GM dealership nationwide, not just the selling dealer.

Question 85: What is the purpose of GM's Required Special Tools (RST) program for authorized dealerships?

To ensure dealers have the manufacturer-specific tools needed to perform proper repairs (Correct answer)
To replace standard shop equipment with GM-branded alternatives
To sell specialty tools to retail customers
To provide technicians with personal hand tool sets

Correct answer: To ensure dealers have the manufacturer-specific tools needed to perform proper repairs

GM's RST program mandates that authorized dealers procure and maintain specific factory-required tools necessary for accurate, complete vehicle repairs.

Question 86: Which GM safety technology warns the driver of vehicles in the adjacent lane blind spot?

Rear Park Assist
Side Blind Zone Alert (SBZA) (Correct answer)
Lane Departure Warning
Forward Collision Alert

Correct answer: Side Blind Zone Alert (SBZA)

Side Blind Zone Alert (SBZA) uses radar sensors to detect vehicles in the driver's blind spot and provides a visual alert in the mirror.

Question 87: What GM specification typically defines the minimum acceptable fuel pressure at idle for a port-injected engine with the vacuum line disconnected from the fuel pressure regulator?

90-110 psi
35-45 psi (Correct answer)
58-72 psi
14-17 psi

Correct answer: 35-45 psi

Most GM port-injection systems specify 35-45 psi base fuel pressure with the vacuum line removed from the regulator; values outside this range indicate a pump, regulator, or restriction issue.

Question 88: What sensor type does GM's Forward Collision Alert system primarily use to detect vehicles ahead?

Forward-facing radar (Correct answer)
Ultrasonic sensors
Infrared thermal camera
Lidar array

Correct answer: Forward-facing radar

Forward Collision Alert uses a forward-facing radar sensor to measure the distance and closing speed to vehicles ahead and warn the driver.

Question 89: Under GM's Special Policy Adjustment, a customer with an out-of-warranty vehicle may receive assistance when:

They purchased an extended warranty from a third party
They purchased the vehicle more than 10 years ago
The repair cost exceeds $5,000
A documented defect exists and the vehicle has low mileage or age relative to the defect (Correct answer)

Correct answer: A documented defect exists and the vehicle has low mileage or age relative to the defect

GM's Special Policy considers factors like mileage, age, and documented pattern defects when evaluating goodwill assistance for out-of-warranty repairs.

Question 90: On a GM vehicle, what condition would cause the PCM to set a P0171 (System Too Lean, Bank 1) diagnostic trouble code?

Downstream oxygen sensor reading 0.8V continuously
A large vacuum leak causing unmetered air to enter the intake (Correct answer)
A rich exhaust condition from a flooded engine
Fuel injector stuck open causing excessive fuel delivery

Correct answer: A large vacuum leak causing unmetered air to enter the intake

A vacuum leak allows unmetered air past the MAF sensor, causing the PCM to see a lean condition; the PCM compensates with positive fuel trim until a P0171 is set when the limit is exceeded.

Question 91: When must a GM dealer complete the CPO inspection relative to the vehicle being retailed to a customer?

Any time during the first year of ownership
Before the vehicle is sold and delivered to the customer (Correct answer)
At the customer's first service appointment
Within 30 days after sale

Correct answer: Before the vehicle is sold and delivered to the customer

The full CPO inspection and certification must be completed before the vehicle is sold and delivered, ensuring the buyer receives a certified vehicle.

Question 92: Under GM Certified Service standards, which parts category must always be used when performing a safety-critical recall repair?

Any nationally recognized brand
Customer-supplied parts if documented
The lowest-cost available option
GM-approved OEM or dealer-sourced parts only (Correct answer)

Correct answer: GM-approved OEM or dealer-sourced parts only

Safety-critical recall repairs must use GM-approved OEM or dealer-sourced parts to ensure the fix meets GM's safety standards.

Question 93: A salesperson tells a customer that a GM CPO vehicle has 'no deductible' for warranty repairs. Is this accurate?

Yes, GM CPO always has zero deductible
It depends — deductible amounts vary by program tier and model year (Correct answer)
No, the deductible is always $200
Deductibles are illegal under federal law for CPO vehicles

Correct answer: It depends — deductible amounts vary by program tier and model year

GM CPO deductible amounts can vary depending on the specific warranty tier, coverage period, and model year, so the salesperson should reference the current program details.

Question 94: What are the key regulatory requirements affecting Electrical Systems?

Regulations are optional guidelines
Only federal regulations apply
Compliance with applicable laws, industry standards, and licensing requirements specific to the field (Correct answer)
There are no regulations

Correct answer: Compliance with applicable laws, industry standards, and licensing requirements specific to the field

Practitioners must comply with all applicable regulations, which may include federal, state, and industry-specific requirements.

Question 95: How old can a vehicle be to qualify for GM’s Approved Pre-Owned certification?

Less than 2 years
Less than 3 years
Less than 10 years
Less than 6 years (Correct answer)

Correct answer: Less than 6 years

To qualify for GM’s Approved Pre-Owned certification, a vehicle typically must be less than six years old. This age limit, along with mileage restrictions, ensures that certified vehicles are relatively new and have significant life expectancy remaining. These criteria help maintain the high quality and reliability associated with the GM Approved Pre-Owned program.

Question 96: What is the most likely cause of a GM vehicle's oxygen sensor reading that is fixed (stuck) at approximately 0.45V and not switching?

PCM commanding open-loop operation during a cold start
Sensor contamination, internal failure, or an exhaust system restriction causing the sensor to lose switching ability (Correct answer)
Normal closed-loop operation at stoichiometric air-fuel ratio
A rich mixture caused by a stuck-open fuel pressure regulator

Correct answer: Sensor contamination, internal failure, or an exhaust system restriction causing the sensor to lose switching ability

A fixed 0.45V reading indicates the sensor is biased at the midpoint and not switching, commonly caused by contamination from coolant, silicone, or age-related internal failure of the sensor cell.

Question 97: What role does continuing education play in Transmission and Drivetrain?

Only required for new practitioners
Keeping practitioners current with evolving best practices and new developments (Correct answer)
Only beneficial for management
It is optional and rarely helpful

Correct answer: Keeping practitioners current with evolving best practices and new developments

Continuing education ensures practitioners stay current with advances in their field.

Question 98: A customer requests that their personal mechanic's supplied brake pads be installed during a GM dealer service visit. The correct technician response is:

Refuse; only GM-approved parts may ever be installed at a GM dealer
Charge a premium labor rate and install the customer-supplied parts without documentation
Explain the warranty implications and recommend approved parts, documenting the customer's informed choice if they insist (Correct answer)
Install them since the customer owns the vehicle

Correct answer: Explain the warranty implications and recommend approved parts, documenting the customer's informed choice if they insist

Technicians should inform customers of warranty risks with non-approved parts and document the customer's decision if they choose to proceed.

Question 99: What quality metrics are most important in Diagnostic Technology?

Measurable outcomes, process compliance, and stakeholder satisfaction (Correct answer)
Only speed of completion
No metrics are needed
Only financial metrics

Correct answer: Measurable outcomes, process compliance, and stakeholder satisfaction

Quality in Diagnostic Technology is measured through multiple dimensions including outcomes, processes, and satisfaction.

Question 100: Which statement accurately describes the role of GM's regional field team in the dealer accreditation process?

They exclusively handle financial audits and have no role in facility or CSI reviews
They are only involved when a dealer files a formal dispute
They make final termination decisions independently without GM corporate review
They conduct evaluations, provide guidance, and serve as the primary point of contact for dealers navigating accreditation requirements (Correct answer)

Correct answer: They conduct evaluations, provide guidance, and serve as the primary point of contact for dealers navigating accreditation requirements

GM's regional field representatives act as ongoing advisors and evaluators who help dealers understand requirements, conduct assessments, and escalate issues to corporate when needed.

Question 101: GM's Rear Automatic Braking (RAB) system is designed to prevent which type of collision?

Head-on collisions at highway speeds
Rollover events on curves
Low-speed backing collisions (Correct answer)
Side-swipe collisions while merging

Correct answer: Low-speed backing collisions

Rear Automatic Braking detects objects behind the vehicle during low-speed reverse maneuvers and automatically applies the brakes to prevent backing collisions.

General Motors Certified Technician Certification

The GM Certified technician program validates expertise across dealer operations, electrical systems, and engine/powertrain systems through GM's Service Technical College (STC). Technicians must score 80% or higher to earn certification credit.

Questions

35 min

Time Limit

80%

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