Model Condition Price Qty  
ST35280P Very Good $19.00
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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.
General Motors
Wiring Diagrams Light Duty Truck 1980 P Truck
2
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This manual covers 1980 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 an A to indicate the 1980 model year.
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