With the ever-increasing competition in the truck market, GM introduced again its Displacement on Demand system now termed the AFM or Active Fuel Management System. This included a unique system to shut off 4 cylinders under light loads. Learn in detail how the AFM operates and more importantly diagnostics of this engine management system. YES, MORE HIDDEN OIL FILTERS! CAREFUL ON USED ENGINE Replacements If you want to keep the MIL off.

COURSE OUTLINE

1. Introduction
2. Base Engine Features, 4.8l, 5.3l, 6.0l, and 6.2L
3. Base Mechanical Issues & Repairs
4. Variable Valve Timing Operations & Diagnostics
5. Active Fuel Management Operation
6. AFM (DOD) Diagnostics
7. AFM (DOD) Repairs and Mods
8. Used Engine Swap Cautions

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