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 1985 GM Trucks Astro/Brigadier
This item is original.
11.00 x 8.50 x 0.10 inches
The Astro diagram is printed on one side of the sheet and the Brigadier diagram is on the other.
1985 GMC Astro 95
1985 GMC Brigadier
1985 GMC Astro 95 1985 GMC Brigadier