This course covers some of the unique engine management features incorporated with GM Trucks. An operating 1994 GM 4.3L central port injection system, which demonstrates the unique fuel delivery system used on these vehicles, will be utilized in class. Intake manifold tuning, linear EGR and dual knock sensors will be some of the inputs covered. The newer CSFI system and the new GM ENHANCED ignition system found on 96 and newer trucks will also be covered. Schematic, DVOM and Labscope Diagnostics will be covered.