Question about 2004 GMC Sierra 2500

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Tow haul not working any ideas - 2004 GMC Sierra 2500

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99 and up did that take the steering wheel cover off that goes around colum after u take it off u look at bottom u will see wire are broke

Posted on Oct 09, 2009

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Posted on Jan 02, 2017

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What would cause my TAHOE TOW/HAUL mode to engage on its own?


You need to have a diagnostic scan tool hooked up ,glitch in one of the control modules or a wire in the circuit shorting to ground ! probably something simple but hard to find ! With a factory scan tool they can check the input signal to the BCM ,PCM .
Tow/Haul mode enables the operator to achieve enhanced shift performance when towing or hauling a load. When tow/haul mode is selected, the tow/haul switch input signal to the body control module (BCM) is momentarily toggled to zero volts. This signals the powertrain control module (PCM) or transmission control module (TCM) to extend the length of time between upshifts and increase transmission line pressure. Cycling the tow/haul switch again, or cycling the ignition switch disables tow/haul mode and returns the transmission to a normal shift pattern.

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Check fuses for cig lighter, and replace a switch for towing

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That light means that the shift points have changed on the transmission. This is to get better economy when hauling. If it wont stop flashing then there is a valve in the transmission that is bad or sticking. You will have to have it removed and overhauled..

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I have a 2000 gmc 1500 Z-71 my tow/haul stays engaged and i am unable to turn it off ...it also come on by itself...


This is only an idea-pull column shifter boot-you will notice a ORANGE wrapped wire which runs from the button on the shifter down toward the steering column. This is the Tow/haul wire. The way this is positioned on the steering column will cause the wire to be pinched when ever the steering wheel is adjusted. This pinching can cause a short or cause the tow/haul not to work at all. NOTE: Inside this orange wire wrap are two very fine fiber wires. Be careful and good luck

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Tow/haul does not work on 2000 chevy truck. whereis fuse?


I had a problem with my tow/haul button not working. I came to find out that the gear shift had cut the wire running to the button in two. You may want to check that.

May 05, 2009 | 1999 Chevrolet Silverado 1500

2 Answers

Transmission tow/haul mode


Hi, the problem is when you are tilting the steering wheel all the way up it's putting to much tenstion on the wires that come outof your shifter that run to the tow/haul button. i am 99% sure your wires are disconected. rewire them and add some extra wire so next time there will be more slack in your wires.

Jul 20, 2008 | 2001 Chevrolet Silverado 2500HD

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