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Old 05-12-2018, 11:54 AM   #4
mr48chev
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Join Date: Jul 2007
Location: Toppenish, WA
Posts: 15,306
Re: Source for wiring schematics?

You may have to find a factory service manual for the model of Trailblazer the wiring came out of. The factory manuals for my 2K cad are two huge volumes with one that is nothing but wiring diagrams and electrical troubleshooting.

You might hit the service department of the local Chevy dealer up an see if they have one you can scan or sometimes they have them on a computer that they can print the pages they want out. Looking on Ebay the service manual peddlers want outrageous prices for them.
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My ongoing truck projects:
48 Chev 3100 that will run a 292 Six.
71 GMC 2500 that is getting a Cad 500 transplant.
77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around.
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