2007 GMC Yukon Denali: sudden loss of power

5 of the 120 complaints about the 2007 GMC Yukon Denali describe sudden loss of power.

owner complaints: 5
of this car's complaints: 4%
typical mileage: 117,000
recalls: 0

Is there a fix? 146 service bulletins cover this area of the car. See below

Sudden loss of power by model year

2012
1
2011
1
2010
2
2007
5
2006
1
2004
5
2003
10
2001
1
2000
1
1999
1

What owners say

Filed Aug 4, 2014 · Electrical, Steering · 88,993 miles · FL

Car alternator failure affecting driveability. Loss of power, steering, brake, door locking system, engine shut off. Car needed to be towed and the cost of repair was $ 550.05 diagnose was replace alternator and belt.

Filed May 13, 2014 · Acceleration, Electrical · 115,345 miles · CA

I had just left the free way went onto a 2 lain road we were driving about 50 mpr then we lost engine power,all the dash lights came on ,we pulled over the car killed,didn't know what to do ,so we waited a bout 8 minutes then turned the key, the car started and we went on our way,a few minutes later it did the same thing, it did it 2 more times, took it to the shop was told it was a gas tank sensor ,$500.00 stoat at the shop,and the car still has the problem,what happens if the engine reduces power while do 65 mpr down the free way, ? I think we have a big safety concern here, and gm needs to know, if they don't all ready know...

Filed Mar 13, 2014 · Electrical, Engine · 117,000 miles · FL

I have just read a few other complaints about an issue I am having now, and have had 3 times in the past. While under normal driving conditions, I have had my SUV become very sluggish and difficult to drive. Lights come on say loss of power, stabilitrac problem etc. The first time this happened, I was visiting orlando florida. I took the SUV to a dealer, and they said there was an issue with the ECM and reprogrammed it. I left back the next day for atlanta. Nearly 80 miles away in ocala florida, it started doing this again. I called a tow truck, and had it taken to an ocala dealership. They in turn told me it was a bad ECM, and after spending an entire day in ocala, I was back on my way to atlanta. Several months later, I had this occur again. Once again I had it taken to a dealership in atlanta. They ran a computer diagnosis on it, and said they had no idea why it was diagnosed as an ECM problem, as the code coming up was due to a problem with the sensor in the floor board that reads the distanceof the gas pedal from the floor board. As it is a drive by sensor vs drive by wire. They repaired this, and although I felt it should have been covered under warranty, even though I was out of warranty at the time, the first two incidents that were supposedly diagnosed wrong were done so while under warranty. They ended up cutting the costs in half. I had no choice, as I needed my vehicle back. Now it has occurred the forth time. I have resorted to the internet to see if other are having the same problem. What I'm finding through this research, it sounds as if many have had the same issue, and it seems to be an issue with the throttle body. While researching, I was alerted to this site, thus the reason I'm posting here. Maybe something can be done about this issue, as it seems this happens quite often, and gmc is keeping it under wraps.

Filed Apr 19, 2013 · Acceleration · 134,000 miles · CA

Tl* the contact owns a 2007 gmc yukon denali. The contact stated that while driving 15 MPH, the ESC and check engine warning light illuminated as the engine lost power. The vehicle was restarted and taken to the dealer for inspection where they advised that the throttle body and the vacuum hose needed to be replaced. The vehicle was repaired but the failure recurred at least twenty-five times. The manufacturer was notified. The failure mileage was 134,000. The VIN was unavailable.

Filed Feb 26, 2013 · Driver assistance, Engine · 126,000 miles · GA

Tl* the contact owns a 2007 yukon denali. The contact stated that the stability trak warning light illuminated as the vehicle began to lose power. The engine power reduced warning message was also displayed. The contact took the vehicle to the dealer and the throttle sensor was replaced but to no avail. The dealer then replaced the brake lamp, but that also did not remedy the failure. The dealer also replaced the throttle body but that also did not correct the failure. The failure mileage was 126,000 and the current mileage was 128,000. Updated 04/02/13