This CD includes complete reproductions of 4 original paper manuals that GMC mechanics used to service trucks. It includes the: 970 page 1974 X-7432 1974 GMC Truck Service Manual Light Duty Trucks Series 1500 Thru 3500 (Includes Jimmy, G, and P Models), the 534 page 1974 X-7435 1974 GMC Light Duty Trucks (Series 1500 thru 3500) Overhaul Manual, the 297 page 1975 X-7532 1975 GMC Truck Service Manual Supplement Light Duty Trucks Series 1500-3500, and the 387 page 1976 X-7632B 1976 GMC Truck Service and Overhaul Manual Supplement Light Duty Trucks Series 1500-3500. The CD includes detailed procedures for lubrication, frame, shock absorbers, front suspension, axle and suspension, brakes, engine, transmission, fuel, exhaust, wheels, tires, chassis-sheet metal, electrical system, heater and air-conditioning. In the overhaul manuals The CD includes step-by-step instructions for tearing down and rebuilding air-conditioner compressor, front axle differential, rear axle differential carrier, engine, carburetors, clutch, transmission, and steering.With clear pictures, exploded view illustrations, schematics, specifications, and a list of special tools, you will have everything you need to get the job d1 right. With the step-by-step illustrated instructions and specifications on this CD. Valuable resource to restore all 1974-1976 GMC trucks, including half ton, 3-quarter ton, 1 ton, 1500, 2500, 3500, C, K, G, P, Fenderside, Wideside, pickup, Sierra, Sierra Grande, High Sierra, Sierra Classic, Street Coupe, Custom, Super Custom, panel, stake, Jimmy, 3+3 crew cab, bonus cab, Suburban, stakebed, crew cab, van, Rally Van, STX, Vandura, van chassis, hi-cube van, Value Van, forward control chassis, and stepvan. Includes 2 wheel drive, 4 wheel drive, and dually models. Covers both gasoline and diesel engines. Includes van-based well as forward control motorhomes chassis, classes A and C. This book covers the part of the motorhome manufactured by GMC and will not cover motorhome bodies.