GMC Pick up Repair and maintenance guide for 1980 GMC trucks. Specifically for light-duty GMC and Chevy trucks. Factory manual from General Motors (GM). Covers work such as: Engine overhaul and maintenance. Electrical systems and technical diagrams. Brakes, suspension, and differential. Fuel and cooling systems. Air conditioning and steering. Includes models such as C/K, Jimmy, and vans. The manual is old and original, and the first two pages are detached from the rest of the book and glued.