Original 1990 Chevrolet Truck Dealer Service Manual. This Manual covers the C/K Pickup Models. These have Information, Illustrations, Diagrams, Specifications and Procedures. These are what the Dealership used to repair your Truck.  Very informative and useful tool that is hard to find since they were not available to the public. Good condition with normal wear, soiling and blemishing from use in a Dealership [see photos].