This CD rom includes complete reproductions of 4 original printed paper manuals that GMC mechanics used to service trucks. It includes the: 453 page 1971 X-7132 GMC Truck Service Manual Series 1500 thru 3500 (Except G Models), the 497 page 1971 X-7132 GMC Truck Overhaul Series 1500 thru 3500 (Except G Models), the 499 page 1972 X-7232 GMC Truck Service Manual Series 1500 thru 3500 (Except G Models), and the 483 page 1972 X-7232 GMC Truck Overhaul Manual Series 1500 thru 3500 (Except G Models). 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 the step-by-step illustrated instructions, specifications, and wiring diagrams on this CD. Valuable resource to restore all 1971-1972 GMC trucks, including half ton, 3-quarter ton, 1 ton, 1500, 2500, 3500, C, K, P, Fenderside, Wideside, pickup, Deluxe, Custom, Super Custom, panel, 3+3 Crew Cab, stake, Jimmy, bonus cab, Suburban, full-size Jimmy, stakebed, forward control chassis, and stepvan. Includes 2 wheel drive, 4 wheel drive, and dually models. Covers both gasoline and diesel engines.