2008 trailblazer tach location?

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=109839
Printed Date: May 13, 2025 at 7:59 AM

Topic: 2008 trailblazer tach location?

Posted By: ds1434
Subject: 2008 trailblazer tach location?
Date Posted: December 17, 2008 at 8:10 PM

PCM plugs are different on the 2008 vs the older ones. What plug, and what color is the tach wire. I would just get an injector but it's a pain on these trailblazers. I tried a couple of white wires in the plug facing the front of the vehicle but wouldn't work.

Thanks

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TechHead

Replies:

Posted By: ceasar326
Date Posted: December 17, 2008 at 10:11 PM

So im thinking you already try this one!

TACH

WHITE

@ PCM, BLUE Plug Pin 49, See NOTE *1

NOTES

NOTE *1 The PCM (Power Control Module) is located on the DRIVERS SIDE of the ENGINE.

Posted By: lsondubz
Date Posted: December 18, 2008 at 4:06 PM

There is a large loom that runs from the firewall on driver side into the PCM thats bolted to the drivers side of the motor, if you open the loom the white wire is usually right there on top, very easy...

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