Three factory repair manuals for 1987 Chevrolet Light Duty Trucks. 1. Light Duty Truck Wiring Diagram Book. 2. 10-30 Series Light Duty Truck Service Manual. 3. Light Duty Truck Fuel Driveability and Emissions Service Manual. Also I will throw in a GM Computer Code Reader Model #3008 for GM Vehicles from 1982 to 1995, all for $50 bucks. These are valuable manuals if you like to do repairs yourself. I've used them countless times.