GM Study Guide 2026
Everything you need to pass the GM exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 GM Exam Format at a Glance
📚 GM Topics to Study (20)
✍️ Sample GM Questions & Answers
1. A GM technician performs a leak test on an AC system using which preferred method per current GM service procedures?
GM recommends using an electronic refrigerant leak detector or ultraviolet dye with a UV lamp to precisely locate leaks, as these methods can detect small leaks accurately.
2. What is the significance of documentation in Transmission and Drivetrain?
Proper documentation supports accountability, enables quality review, and satisfies legal requirements.
3. What are the key regulatory requirements affecting Diagnostic Technology?
Practitioners must comply with all applicable regulations, which may include federal, state, and industry-specific requirements.
4. What additional benefit often comes with a GM Approved Pre-Owned vehicle?
A significant additional benefit that often comes with a GM Approved Pre-Owned vehicle is extended warranty coverage. This warranty provides an extra layer of protection beyond any remaining factory warranty, covering major components and offering peace of mind to the buyer. It's a key differentiator that adds value and reduces potential ownership risks compared to standard used cars.
5. What role does continuing education play in Engine Systems?
Continuing education ensures practitioners stay current with advances in their field.
6. Which GM system monitors fuel trim values to diagnose fuel delivery issues?
The PCM continuously monitors short-term and long-term fuel trim values to adjust the air/fuel mixture and detect deviations that indicate fuel system faults.
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How this page was made: written with AI tools and published by Nathan Beja, founder of Practice Test Geeks, who is responsible for its content. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy
Sources & references
Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy
- gm-techlink.com — Eligibility, exam information · verified Oct 2026
- catalog.gmstc.com — Test delivery, eligibility, passing score, renewal, score release, score validity · verified Oct 2026