Condition Price Qty  
Very Good $19.00
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.
Wiring Diagrams Medium/Heavy Duty Truck 1981 GM Trucks General
This item is original.
11.00 x 8.50 x 0.10 inches
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Covers the General, also known as N9E042, N9F042, N9E064, or N9F064 models 4X2 & 6X4. To verify that this is the correct diagram for your truck, you can check your VIN code. The 6th digit should be either an E or an F for the aluminum conventional cab, and the 10th digit should be a B to indicate the 1981 model year.
1981 GMC General
1981 GMC General