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Tow Control Issue.
storeyr
post Aug 5 2017, 04:24 PM
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New to the forum and just purchased a 2004 Z71 Tahoe. Tried searching searching but couldn't find what I am looking for. The tow/haul light comes on when I press the button but nothing happens with engine rpm's and shifting doesn't change. Basically nothing happens. Anyone else have this issue? I don't tow a lot and its usually just my exmark, so nothing extremely heavy. Still would like to have it working properly. Any thoughts?
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hdwrench99
post Aug 5 2017, 05:26 PM
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Without a load, it doesn't seem to do much. It will still go into overdrive. Once you get a decent load, or drive more aggressively, you'll notice the difference. It hangs onto each gear a little longer. I believe it alters the torque management in the fuel/spark tables as well, but don't quote me on that.


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storeyr
post Aug 5 2017, 08:57 PM
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QUOTE (hdwrench99 @ Aug 5 2017, 06:26 PM) *
Without a load, it doesn't seem to do much. It will still go into overdrive. Once you get a decent load, or drive more aggressively, you'll notice the difference. It hangs onto each gear a little longer. I believe it alters the torque management in the fuel/spark tables as well, but don't quote me on that.


Thanks for the reply. I have owned a 2006 Yukon 2wd and a 2004 sierra 2wd and both of those seemed to change rpm's when button was pressed even when not hauling anything. I've read several posts and they all seem to center on the orange wire. In those posts, the light on the dash doesn't come on. I'm Just hoping it's not a sign of a much bigger issue.
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jipioneer07
post Aug 6 2017, 05:34 PM
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Were they all geared the same?


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storeyr
post Aug 7 2017, 05:58 PM
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QUOTE (jipioneer07 @ Aug 6 2017, 06:34 PM) *
Were they all geared the same?

Not sure. Those were both 2wd, so probably not.
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