Original 1973-77 Chevrolet & GMC Truck Dealer Parts Book. This GM Parts Book covers the GMC and Chevrolet Series 10 thru 35 Light 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 and no Illustrations. It is in good condition with minor wear and blemishing from use in a Dealership [see photos].