Question about 2001 GMC Yukon XL

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2001 yukon xl 6.0 ltr engine-transmission problem

I have the above listed vehicle, it currently has 59,000 miles on it, recently
I have been experiencing a problem when the vehicle reaches speeds of 65mph or higher. The rpm gauge that normally read 2400 now reads 3500-4000rpm's. I am thinking that there is a problem with the overdrive as it appears it is not shifting into overdrive at these higher speeds. The vehicle functions normally at lower speeds. I have had no other problems with this vehicle and it normally sits in my driveway unless I am traveling long distances or going on vacation. Before I take it to a transmission shop and have to fork over big cash, knowing what is wrong with it and an approx. repair cost would put my mind at ease.

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It sounds like it may be an electrical problem. Maybe a problem with the TCM, or a sensor.

Posted on Mar 09, 2009

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Posted on Jan 02, 2017

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