Original 1973-75 General Motors Truck Dealer Parts Book. This large Parts Book covers the Heavy Duty Series 7, 8 & 9 GM Trucks. These Models are: Chevrolet 7000, 8000, 9000, GMC 7500, 8500, 9500, 9502. This is what the Dealer used to order Factory Replacement Parts to Repair your Truck. It has Part Numbers, Group Numbers, Description, Quantity, Application and Illustrations. It is in very good condition with minor wear and blemishing [see photos]. Very rare and useful tool for the GM Truck Owner or Collector.