2005 sub. tow haul does not work

2005 sub. tow haul does not work

Posted in the Chevrolet Suburban Forum

howie

Kendall, WI

#1 Nov 28, 2008
when i push the tow haul button the lite does not come on the dash and it dose not change my rpm in other words its not locking out Overdrive could not find any fuses or anything in the owners manual about it.
Tom

Emmaus, PA

#2 Dec 30, 2008
Have the same problem on 2001. Took it to the dealer. Just had a new transmission installed in August 08 and they say its not part of the transmission function therefore not covered under the 1 year, 12000 mile warranty....$280 for the part to fix it. They said it was something with the switch. I don't think you really need the button to function, you should be able to lock out overdrive by shifting the column into 3 below D. If this is incorrect can someone please tell me.
Jeff in CO-2

Houston, TX

#3 Dec 31, 2008
The tow/haul button doesn't really take the truck out of overdrive. It basically tells the transmission to keep the truck in the gear longer before shifting into the next one. It also makes the shifting into each gear a little more firm to prevent any excessive slippage. This ultimately is suppose to help with the tranny temp to keep it more cool.... rather than to shift around excessively creating heat and wear.

To get the truck out of Overdrive, you need to physically shift the lever down.

This has been my experience with my 04' 2500 Yukon XL.
howie

Holmen, WI

#4 Jan 15, 2009
I found the problem i had a broken wire in shift column i spliced the wire and it works fine both wires are the same color so i don't think it matters how they were hooked together .the tow haul button changes your shift points and raises line pressure so it definetly is a good thing to have working.i used ALLDATA/diy to figure it out great source for info.
Jason

Nashville, TN

#5 Mar 30, 2009
I just found out this weekend that I have the same problem. How hard was it to fix the problem in the shift column?
howie wrote:
I found the problem i had a broken wire in shift column i spliced the wire and it works fine both wires are the same color so i don't think it matters how they were hooked together .the tow haul button changes your shift points and raises line pressure so it definetly is a good thing to have working.i used ALLDATA/diy to figure it out great source for info.
Jason

Nashville, TN

#6 Apr 1, 2009
I had the some problem as Howie. I took his advice, and look at the wire at the shifter column. The wire was broke and I spliced it back together in about 15 min. Problem solved.

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