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
#555 of 585 reduced engine power, check engine, stabilitrak
Apr 16, 2013 (9:33 am)
I of course am having this same issue with my 2010 GMC Yukon XL, I took it into the dealer, and my vehicle is out of the 3 year 36,000 mile warranty, I only have the Power Train Warranty left, I have 47,000 miles on the vehicle. Thi reduced engine power, check engine, stabilitrak issue happened twice within the past 5 days and after it happened the second time we took into the dealer to get it checked out. When I got the call today from GMC Service department I was not surprised to hear them say that it was indeed the Throttle Body. I was quite surprised to hear that GM has extended coverage on the throtle body and it will be replaced under warranty. So this was a nice surprise, Thank you GM for realizing this is a problem and offering extended warranty on the part/labor. It has yet to be determined whether this has solved the problem, hopefully it has and all is well.
#556 of 585 Re: reduced engine power, check engine, stabilitrak [2010gmcyukonxl]
Apr 16, 2013 (5:42 pm)
Great to hear that your repair is going to be covered under warranty. Feel free to reach out to us with any future questions or concerns you may have.
GM Customer Care
#557 of 585 Re: reduced engine power, check engine, stabilitrak [2010gmcyukonxl]
Apr 16, 2013 (5:51 pm)
UPDATE - I just got the vehicle back from the dealer service department and it turns out that the Throttle Positioning Sensor was replaced not the "Throtle Body", however it was covered under warranty and it seems to be working fine now, I just hope this was the problem and is fixed for good.
#558 of 585 Re: reduced engine power, check engine, stabilitrak [gmcustsvc]
May 24, 2013 (10:46 pm)
GM Customer Care
I have a 2004 Chevrolet Tahoe. For about a year now I have been trying to get my Reduced Engine Power issue resolved. I have had my Tahoe looked at by two GM dealers....Dale Earnhardt in Newton, NC and Randy Marion in Mooresville, NC. Dale Earnhardt said I needed to replace the entire wiring harness for around $900. Randy Marion said they could not find anything wrong with my Tahoe. So far I have replaced the throttle body replaced four time, the wiring harness going to the throttle body, the accelerator pedal, and the control module on the fire wall. I have had the wiring harness checked by two vehicle electrical specialists. I have spent around $4000 on this issue with no resolution. I do not want to get rid of this vehicle as I inherited it from my mother when she passed away two years ago. I am a disabled Marine Corps veteran and do not have an unlimited budget to spend on such issues. Any help would be greatly appreciated. Please Please Please help me. My wife drives this vehicle with my 6 year old daughter. This issue is a huge safety risk. I pray that GM will do the right thing here. Thanks for your time.
#559 of 585 Re: Reduced Engine Power
Jun 17, 2013 (9:17 am)
Ditto to the gentleman in message #558. I have a 2005 Denali and have replaced 3 throttle bodies, 2 wiring harnesses, 2 accelerator pedals and 7 days ago got stranded on vacation in Myrtle Beach, SC and had to rent a car for 4 days. The GM dealer called 'Detroit' and they said the wiring harness needed replacing. $800 for car repairs and $249 for car rental we went 70 miles before the reduced engine light came on again and the car slowed. We've been to 5 different GM Dealers, over $5,000 in repairs with not results. We have 4 GMC vehicles now, have owned 5 GMC's in the past. Can't believe a company as large as GM can build something that's unrepairable. No wonder the government had to bail them out. If anyone can help us, it would be greatly appreciated. Need to get in running in order to sell it.
#560 of 585 Re: Reduced engine power [devoz71]
Jun 25, 2013 (3:49 pm)
Maybe you can help me out. I have a 2003 Yukon Denali 6.0 liter engine. I have 300k miles on it. Recently the reduced engine power has been coming on. It gets worse when the ac is running. I have read all the blogs. Some fixes are dry gas and premium gas. Others is to replace the map sensor. I have taken off the engine cover thinking that it is touching, but no luck. One thing I have noticed is when it is about to happen the temperature gauge pings all the way to the right and the reduced power happens. Any help with this would be great. This is driving me crazy.
#561 of 585 2008 1500 savana reduced engine power
Jun 27, 2013 (5:06 am)
My 2008 Savana 1500 5.3 AWD van with 65000 miles . The reduced engine power stadila track low engine oil and po107 po641. When clearing codes the engine stops and only way to restart is to disconnect battery and reconnect and it might start. I have replaced the electronic throttlebody and the plug at the tb, replaced the map also.
#562 of 585 2003 Yukon - Reduced Engine power
Jul 03, 2013 (6:43 am)
We are also getting the check engine and reduced engine power. We had it in to a dealer multiple times and they could not correct it. I replaced some of the wiring to no avail. What we found worked is replacing the gas cap. We can go for a year or so now before it comes on again. We have a spare gas cap with us and just hop out and replace it and off we go. I would be interested in hearing if this works for others that have this issue.
#563 of 585 2013 silverado traction control
Aug 21, 2013 (5:42 pm)
ive had this issue now for 4 months and ive been to the dealership 2 times now and they know nothing nor can they find anything. every downhill turn or bump on a turn my traction/stabiltrak light comes on and it stalls out on me for a few seconds but regains power after it becomes stable again. ive heard tbs,steering wheel sensor, wheel speed senor to where its costing a ton of money guessing. you would think with this many issues everyone is having that GM would look farther into this and train the shops to fix the problems and take care of the expense since we pay the high price to own a GM product. i dont even have 20,000 miles on my truck and its a pain to drive with this issue.
#564 of 585 Reduced Power light
Aug 23, 2013 (6:46 am)
I have a 2000 Yukon has ran great until yesterday I have noticed for a couple months my Track light would stay on as if I turned track control off and I wasn't able to turn it back on. We'll it would only do that once in a wile but truck was still running fine Yesterday on the Way to get my daughter from school The reduced power light came on and I could not move . I did like everyone else and shut truck off and back on and the reduced power like was gone but now I had the service engine light on I went back home did a goggle search for the problem and found these forms . I tried tighting the battery cable to the engine block started it back up the service engine light went away I ran the codes and it came up with P1286. p1125 and p1285 I cleared the codes in hoping I fixed it but on the way to take my daughter to school today it did it again.. Has ANYONE fixed the problem for good yet if so Please let me know . and any help would be greatly appreciated.. Thank you David