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. This diagram is the same as the one found in the shop manual. 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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