Original 1970-72 Chevrolet Truck Dealer Chassis and Body Parts Catalog. This Parts Book covers the Heavy Duty Series 90000 Truck Models. It is dated Effective February, 1977. This is what the Dealer used to Order available Factory Replacement Parts to Repair your Truck. It has Part Numbers, Group Numbers, Description, Quantity, Application and Illustrations. It is in good condition with minor wear and blemishing from use in a Dealership [see photos]. This is a loose leaf Catalog with no Binder. Very rare and useful tool for the Truck Owner.