Original 1979 Chevrolet & GMC Truck Dealer Parts Book. This GM Parts Book covers the Series 5, 6 &7 Conventional Medium Duty Truck Models. This is what the Dealer used to order the Factory Replacement Parts to Repair your Truck. It has Part Numbers, Group Numbers, Description, Quantity, Application and no Illustrations. It is in very good condition with minor wear  [see photos]. Loose leaf pages with no binder.