This CD rom includes complete reproductions of 2 original printed paper manuals that GMC mechanics used to service trucks. It includes the: 1136 page 1981 GMC Service Manual Light Duty Trucks and the 532 page 1981 GMC Unit Repair Manual Light Duty Trucks Get the know-how on front-end alignment, fender, hood and grille replacement, brake system maintenance, clutch removal installation, ignition timing, engine tune-up, carburetor overhaul, power steering repair, transmission inspection, and much, much more! The overhaul (also called unit repair) manual contains instructions on how to completely disassemble, refurbish, and reassemble comp1nts after they are removed from the vehicle. 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 step-by-step instructions, clear pictures, exploded view illustrations, schematics, and specifications, Valuable resource to restore all 1981 GMC trucks, including half ton, 3-quarter ton, 1 ton, 1000, 1500, 2500, 3500, C, K, G, P, W, Fenderside, Wideside, pickup, Sierra, Sierra Grande, High Sierra, Sierra Classic, Street Coupe, crew cab, bonus cab, Suburban, full-size Jimmy, stakebed, crew cab, van, Rally Van, STX, Gaucho, Gypsy, Magna Van, 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 CD covers the part of the motorhome manufactured by GMC and will not cover motorhome bodies.