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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.


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Exact Title: Cab, Engine and Chassis Wiring - DP-9003ND; DP-9502ND - MD-11645"
Page Count: 1
Wiring Diagrams?: Included
Authenticity: This item is original.
Dimensions: 11.00 x 8.50 x 0.10
OEM Part Number: MD11645

Model-Years Application

Covers GMC Astro 95 and Chevrolet Titan 90, also known as D9, equipped with the GM 12V-71 diesel engine. To verify that this is the correct diagram for your truck, you can check your VIN code. The 2nd digit should be a D for heavy duty aluminum tilt cab, the thrid digit sould be a P to indicate the 12V71 diesel, and the 6th digit should be a 4 for the 1974 model year or a 5 for 1975.

This diagram covers 1975 models built prior to March 1, 1975. If you have a 1975, to find out if yours is a early-year model (built before March 1, 1975), check the last six digits of the VIN, which should be smaller than 590000 for GMC or smaller than 140000 for Chevrolet. See the mid-1975 diagram if the last six digits are larger.
1974-1975 Chevrolet Titan 90
1974-1975 GMC Astro 95


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