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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 -- TE/TM-5500; TE/TM-6500; TM//WM-7500; TG-5500"
Page Count: 2
Wiring Diagrams?: Included
Authenticity: This item is original.
Dimensions: 11.00 x 8.50 x 0.10
OEM Part Number: MD7890 1972

Model-Years Application

Covers medium duty GMC steel tilt cab truck models with gas & diesel engines, also known as TE/TM-5500; 6500; TM/WM-7500 or TG-5500. To verify that this is the correct diagram for your truck, you can check your VIN code. The 2nd digit should be a T for the steel tilt cab, the third digit should be an E, M or G for the gas or Turbium Diesel engines, and the 6th digit should be a 2 or a Z to indicate the 1972 model year.
1972 GMC Series 4500-6500
1972 GMC Series 7500-9500


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