Original 1978-87 GMC Truck Dealer Parts Catalog. This Parts and Illustrations Book covers the Caballero Models. 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 soiling [see photos]. Very rare and informative piece that will be a valuable tool for the Caballero Owner or Collector.