This CD rom includes complete reproductions of 2 original printed paper manuals that GMC mechanics used to service trucks. It includes the: 377 page Maintenance Manual 1947-1954 models 100-400 and the 690 page Maintenance Manual 1955-1959 GMC Trucks models 100-500. 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! With clear pictures, exploded view illustrations, wiring diagrams, 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 1947-1959 GMC 100-500 models, the 3-, 4-, and 5-speed transmissions as well as the hydramatic, except for the 1956 316 V8 engine (even though the cover mentions 1955, it is not useful for 1955 unless you have the 270 engine).