Original 1949-52 GMC Truck Dealer Master Parts Book. This Parts Catalog covers the Heavy Duty 400 thru 980 Truck Models. It also covers 1947-48 Model 450. 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 some Illustrations. It is in good condition with normal wear and soiling from use in a Dealership [see photos]. Very rare and informative tool for the GMC Owner or Collector.