"1991 Light Duty Truck Fuel and Emissions Service Manual Including Driveability (Fuel Injected Gas Engines Only)" Written for GMC dealership mechanics, this factory-published original manual shows you how to work on your vehicle's electronic fuel & emissions controls for fuel injected gas engines. Learn to locate, test, troubleshoot, repair, or replace the sensors, valves, and electronic control modules. This manual also cover driveability--how smoothly your engine starts, runs, and stops. You will learn to troubleshoot problems like hard start, rough idle, and dieseling. With step-by-step instructions, clear pictures, exploded view illustrations, schematics, and specifications, you will have the information you need to get your project on the road and keep it there. This manual covers 1991 GMC trucks, including half ton, three-quarter ton, one ton, 1500, 2500, 3500, C, K, G, P, R/V, pickup, Suburban, full-size Jimmy, S-15 Jimmy, Sonoma, stakebed, platform, crew cab, Safari, Vandura, Rally Van, van chassis, hi-cube van, forward control chassis, and stepvan. Includes 2 wheel drive, 4 wheel drive, and dually models. Includes van-based well as forward control motorhomes chassis, classes A & C. This book measures 8.5" x 11" and is 1" thick. Buy now to own the best manual for your vehicle.
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