1979 GMC Truck All Medium and Heavy Duty Models - Wiring Diagrams

Original Factory Soft Cover Manuals from GMC in Good Condition: This manual covers All Medium & Heavy Duty GMC Trucks including Conventional, Tilt, Bus & Forward Control models. 

The manual covers the following engine types:

• Gasoline Engine Models
• GMC Diesel Models
• Detroit Diesel Models
• Cummins Diesel Models