Original 1973-77 Chevrolet & GMC Truck Dealer Parts Book. This GM Parts Book covers the GMC 7500, 8500, 9500, 9502 and Chevrolet 7000, 8000, 9000 Heavy Duty Truck Models. This is what the Dealer used to order the Factory Replacement Parts to Repair your Truck. It has Part Numbers, Group Numbers, Description, Quantity, Application but NO Illustrations. It is in good condition with normal wear and blemishing from use in a Dealership [see photos]. The front and back covers are not present but appears to be complete otherwise [no Binder].