This is the original wiring diagram printed by GM for dealer mechanics. You can follow the wiring in your truck from bumper-to-bumper. It will help you to understand connector configurations, and locate & identify circuits, relays, and grounds. Although the schematic is in black and white, the color of each wire is noted. You will not find this diagram in your shop manual. The schematic measures 8.5" x 11" when folded up, and opens up to 11" by 38". The diagram pictured is an example of this type when folded, but is not the actual diagram for your vehicle. Buy now for the best electrical repair info - the factory wiring diagram.
1979 Truck Wiring Diagrams Models 10 thru 35 P Truck
This item is original.
11.00 x 8.50 x 0.10 inches
This manual covers 1979 Chevy & GMC forward control truck chassis, including three-quarter ton, one ton, P 20, P 30, P 2500, P3500, forward control chassis, and stepvan. Covers both gasoline and diesel engines. Includes class A forward control motor home chassis. This book covers the part of the motorhome manufactured by GM and will not cover motorhome bodies. To verify that this is the correct diagram for your truck, you can check your VIN code. The 2nd digit should be a P for the forward control model, and the 6th digit should be a 9 to indicate the 1979 model year.
1979 Chevrolet P10 Step-Van Standard Cargo Van 2-Door
1979 Chevrolet P10 Stripped Chassis 0-Door
1979 Chevrolet P20 Step-Van Standard Cargo Van 2-Door
1979 Chevrolet P20 Stripped Chassis 0-Door
1979 Chevrolet P30 Step-Van Standard Cargo Van 2-Door
1979 Chevrolet P30 Stripped Chassis 0-Door
1979 GMC Motorhome Chassis
1979 GMC P1500 Stripped Chassis 0-Door
1979 GMC P1500 Value Van Standard Cargo Van 2-Door
1979 GMC P2500 Stripped Chassis 0-Door
1979 GMC P2500 Value Van Standard Cargo Van 2-Door
1979 GMC P3500 Stripped Chassis 0-Door
1979 GMC P3500 Value Van Standard Cargo Van 2-Door
1979 Chevrolet P10 1979 Chevrolet P20 1979 Chevrolet P30 1979 GMC Motorhome Chassis 1979 GMC P1500 1979 GMC P2500 1979 GMC P3500