Original 1955 GMC Dealer Parts Book. This Parts Catalog covers the Models 550 thru 970 Trucks. It Part Numbers, Group Numbers, Description, Quantity, Application and no Illustrations. This is what the Dealer used to order Factory Replacement Parts to Repair your Truck. It is in good condition with minor wear and soiling [see photos]. Very rare and informative piece of History that will be a great tool for the GMC Owner or Collector.