Last post on Dec 03, 2013 at 11:06 AM
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GMC Yukon Denali, GMC Yukon XL, Car Safety, Electrical, Engine, SUV
#130 of 585 Traction Control OFF, Reduced Engine Power
May 12, 2011 (3:39 pm)
I have 2010 GMC Yukon XL (19K miles).
I think no one had problem with the car that new yet on this forum.
I was getting off the freeway when I got lights on: first Traction Control Off and then Reduced Engine Power. But instead of reducing the engine power car totally shut down in the middle of the big intersection.
I was lucky it did not happened on freeway with my 2 little kids. But it was really scary, when you can’t rally push the brakes or make car turn.
I tried to turn the engine on for a good 20 min, but no luck. Finally two big guys helped me to push the car off the intersection to the closest gas station.
When the tow away guy got to the gas station to pull me to the closest dealership he was able to start the car (40 min after it got shot down). But the engine light was still on.
My car in the dealership now and they told me that they would be able to fix it.
I will keep posted to what ever happened to it.
After reading a lot on this forum I had called the dealership service and mentioned that if they check the ground wires that it might help. They just gave me an advice: “Do not use the internet for finding any problems and resolutions for these problems”…
Well, car in service now, I will keep posted, if it was fixed.
#131 of 585 Re: Traction Control OFF, Reduced Engine Power [karmusha]
May 16, 2011 (10:18 am)
I apologize for the problems you are experiencing with your vehicle. Please keep me posted when the issue has been taken care of.
Caron, GM Customer Service
#132 of 585 Re: Traction Control OFF, Reduced Engine Power [gmcustsvc]
May 16, 2011 (10:44 am)
I replace the throttle body Thursday 12 May 2011 have driven approx 500 miles without an issue. I'm keeping my finger cross the issue is resolved
#133 of 585 Re: Traction Control OFF, Reduced Engine Power [karmusha]
May 16, 2011 (11:44 am)
The dealership and GMC would be very happy if no one ever looked on the internet or talked to other GMC owners to see if they have had a similar problem.
I only started looking on the internet when the dealer told me that the part (THROTTLE BODY) was on backorder and it would be a MONTH to get the part!! I have 3 kids and my 2007 GMC also died on a very busy freeway. It is a safety issue.
Since it appears that this part is failing at an alarming rate and with potentially dangerous consequences, I filed a safety complaint with the National Highway Transportation Safety Board. I had hoped that GMC would recall the models affected and replace the part before it fails, but they are doing nothing.
May 16, 2011 (12:01 pm)
The problem is that it is not the throttle body. I have changed the throttle body, throttle actuator control (TAC), throttle position sensor, mass air flow sensor, oxygen sensors, throttle body wiring harness, and most recently fan clutch. Still have the same problem. Does anyone know what this is?
#117 of 133 Reduced Engine Power- 2003 Chev. 2500 by nomoregm4 Mar 08, 2011 (3:54 pm)
I have been frustrated by this reduced engine power enigma. When it first started occuring about 6 months ago I took it to autozone for a free diagnostic. The code came back as throttle position sensor, TAC, or TPS. I was convinced for whatever reason that it was the TAC, so I went to the Chevrolet dealer parts counter and requested one after explaining what was going on to the clerk. He advised me that I should have a technition look at it so I scheduled an appointment. Of coarse you can't speak with a knowledgable mechanic at the dealership so I get a call from the customer service rep and she tells me I need a new throtle body and throttle body harness which they could install for only about $900. I told her I would fix that myself and forego the $1000/hr labor charge that they get. Paid $90 diagnostic fee for the same info I got at Autozone for free. I purchased the overpriced harness from GM (as that is the only place to get one) for $140 and a new throttle body from Autozone (for $158 vs. $300 at Chev) whent home and replced the parts in about 20 min. Guess what, same problem so I go back to my thinking that it is the TAC. So I buy a TAC from Chevrolet as tho only supplier for $300 still the same problem. I call the customer service rep at Chevrolet dealership and she tells me that I must have the computer reprogramed after changing these parts. I set up an appointment and pay $100 dollars only this time I strategically wait for the mechanic to come driving up and corner him. He tells me that it could have been several things but it is deffinately fixed now and all codes are cleared. 30 minutes later the same problem. I changed the throttle position sensor as well as the mass air sensor but still have the same problem. I have wiggled the harness on the throttle body as somebody suggested with no changes. A friend of mine has the same truck and is having the same problem. I believe this is common and GM doesnt want to take care of it. After 40 years of GM loyalty I am done buying them but I am stuck with 2 now and don't know what to do. From what I gather no one else does. btw this truck has 180000 miles and runs well except for this
#135 of 585 Re: Traction Control OFF, Reduced Engine Power [donewithgms]
May 19, 2011 (10:14 am)
By chance, have you spoken with GM Customer Assistance?
Caron, GM Customer Service
#136 of 585 Re: nomoregm4 [nomoregm4]
by Stever@Edmunds HOST
May 19, 2011 (10:31 am)
Check out this thread over in Edmunds Answers too. It's about a TrailBlazer, and the owner threw a bunch of parts at the problem. Sounds like it's been a hard problem to trace for a few owners.
#137 of 585 Re: Traction Control OFF, Reduced Engine Power [gmcustsvc]
May 19, 2011 (1:10 pm)
Yes, I have. I asked GM to pay for the part, since after looking around it became apparent that it was not only my GM that was having the problem.
They did not have any real interest in my problem because "there was no recall" and the warranty had expired. They would not even acknowledge that the part had been on backorder! They told me that GM would not pay for the part and to save my receipts in case of a recall.
If was after speaking to them that I decided that other GM owners needed to know about the problem and lack of service, so they could make more informed decisions or at the very least get rid of their GM's before the warranty expired.
#138 of 585 Re: Traction Control OFF, Reduced Engine Power [donewithgms]
May 20, 2011 (6:15 am)
Since you spoke with GM Customer Assistance, could you please email me your case number? I would like to look further into your situation.
Caron, GM Customer Service
#139 of 585 Re: Traction Control OFF, Reduced Engine Power [gmcustsvc]
May 20, 2011 (8:51 am)
here is the file number: 71-934530838