Original 1979 GMC Truck Dealer Service Manual. This Manual covers the Caballero Models. These are what the Dealerships used to service and repair your truck. It has information, illustrations, diagrams, specifications and procedures to maintain your vehicle. Very useful and informative tool for the GMC Owner which was not available to the public. Good condition with normal wear and soiling from use in a Dealership [see photos].  X-7931