Original 1977 GMC Truck Data Book. This Dealer Reference Book was used to educate Sales Staff on the Light Duty Truck Models and to help Customers make their purchase. It shows features, options, specifications, pricing and E-Z Specs for the Full Line of Light Duty Truck Models, including Motor Home Chassis. It does not have a binder but is in good condition with minor wear and soiling [see photos]. Very rare and informative Dealer Only piece.