2500 hd tach wire

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=62456
Printed Date: May 09, 2025 at 6:21 PM

Topic: 2500 hd tach wire

Posted By: jkyliej
Subject: 2500 hd tach wire
Date Posted: September 09, 2005 at 9:59 PM

Hey all,

Can someone give me the location/color of the tach wire on a 2001 4x4 GMC 2500 HD Automatic with 8.1 gas motor? The info I have covers all motors up to 6.0.

Thanks

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JKJ

Replies:

Posted By: jkyliej
Date Posted: September 10, 2005 at 9:37 AM

I know this is an easy one for someone. Can sombody help me out? I have tried searching the site but didn't find anything.

Thanks.

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JKJ

Posted By: Scott35
Date Posted: September 10, 2005 at 9:53 AM

I beleive if you'll pull the dash cluster out, there should be a white wire on the back to use for tach.

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Tacomacrew

Posted By: jkyliej
Date Posted: September 11, 2005 at 8:27 PM

You know I am more than a little dissapointed in this site and the wiring color cd that I bought from the 12 resource. I paid twenty bucks for this cd and it does not tell me where or what color the tach wire is for the truck I have been asking about in this posting. I have donated time to this site helping people and now I can't get a simple location and color for a tach wire.

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JKJ

Posted By: mo12v
Date Posted: September 11, 2005 at 8:38 PM

Tach Signal

WHITE

FOR THE V-8 AT THE P.C.M. *

* Power Control Module Located At The Left Front Of The Engine Compartment Pin 10 of the 80 pin connector. WHITE-For The V-6 At The Coil On Top Of The Engine.

Just a Note:
I have 8 different sources, not to mention 2 CD DATA Disc's and I still can't get ALL Info that I need...............
I really think this site is the BEST on the Internet for ALL, Installers & Week-end Warriors. I'm sure if there was a better place, this site would have crashed a long time ago...............

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MO

Don't Learn from Others Mistakes
You Might Be the One That Knows.

Posted By: jkyliej
Date Posted: September 11, 2005 at 8:41 PM

Thank you.

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JKJ

Posted By: mo12v
Date Posted: September 11, 2005 at 8:47 PM

This was from a previous Post::

carstarter

Newbie

Joined: December 20, 2003
Location: United States
Posts: 9

Posted: December 28, 2003 at 8:20 PM - IP Logged

sroth140 wrote:

heres a good one, pull off the dash like you were going to install a radio, then pull the shifter in to the lowest gear. after that, tilt the steering wheel all the way down. take out the 4 philips head screws that hold the instrument cluster in, tilt it forward and pull it out. find the only white wire (99% sure the only one) in that harness and test it with a voltmeter on AC. that will work perfect.

beats going into the engine and messing around there. ive done about 10 of those style suburbans, sierras, ect... trucks since the month started. they are pretty simple to do, all of the wires are right under the dash after two 7mm screws and four 10mm nuts. the locks and lights can be snagged at the BCM right under the steering wheel and the brake wire is right there too on the brake switch.

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MO

Don't Learn from Others Mistakes
You Might Be the One That Knows.