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.
1975 Truck Wiring Diagrams MD13933
This item is original.
11.00 x 8.50 x 0.10 inches
Covers the Astro 95 and Titan 90 with 8V-92 Diesel, aslo known as DK-9003 or DK-9502. To verify that this is the correct diagram for your truck, you can check your VIN code. The 2nd digit should be either a D for the aluminum tilt cab. The 3rd digit should be a K to indicate the 8V-92 Detroit Diesel. The 6th digit should be an 5 for the 1975 model year.
1975 Chevrolet Titan 90
1975 GMC Astro 95
1975 Chevrolet Titan 90 1975 GMC Astro 95