This CD rom includes complete reproductions of 2 original printed paper manuals that Chevrolet mechanics used to service vehicles. It includes the 482 page 1972 Series 10 through 30 Chevrolet Truck Chassis Service Manual and the 489 page 1972 Chassis Overhaul Manual. In the service manual The CD includes detailed service procedures for lubrication, frame, shock absorbers, front suspension, rear axle and suspension, brakes, engine, transmission, fuel, exhaust, wheels, tires, chassis-sheet metal, electrical system, heater and air-conditioning. In the overhaul manual 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 the step-by-step illustrated instructions, specifications, and wiring diagrams on this CD, Valuable resource to restore all 1972 Chevy 10-30 series pickup, ?-ton through 1-ton truck, Blazer, Suburban, and van.