Original 1949 GMC Truck Dealer Parts Book. This Parts Catalog [dated July, 1949] covers the Heavy Duty Truck H Series 520 thru 970 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 no Illustrations. It is in good condition with minor wear, blemishing and soiling from use in a Dealership [see photos]. Very rare and informative tool for the GMC Owner or Collector.