This CD rom includes complete reproductions of 2 original printed paper manuals that GMC mechanics used to service trucks. The 960 page 1973 GMC Truck Service Manual Light Duty Trucks Series 1500 thru 3500 (Includes Jimmy, G and P Models) and the 510 page 1973 GMC Truck Overhaul Manual Light Duty Trucks Series 1500 thru 3500 (Includes Jimmy, G and P 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. You can use the information on this CD to restore 1973 GMC trucks, including half ton, 3-quarter ton, 1 ton, 1500, 2500, 3500, C, K, G, P, Fenderside, Wideside, pickup, Sierra, Sierra Grande, Custom, Super Custom, panel, stake, Jimmy, Suburban, 3+3 crew cab, bonus cab, Suburban, full-size Jimmy, 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 CD covers the part of the motorhome manufactured by GMC and will not cover motorhome bodies.