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. The schematic measures 8.5" x 11" when folded up and opens up to 11" by 38". Buy now for the best electrical repair info - the factory wiring diagram.
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