2004 GMC Yukon Denali: sudden loss of power

Filed Feb 21, 2015 · Electrical, Engine · 82,000 miles · OH

Driving vehicle at 30 MPH. Lost all power and engine. No brakes, no power steering, no dash lights, engine quit running, no exterior lights. Parked vehicle in parking lot. No power at all. After about 20 minutes of waiting vehicle started again and had minimal acceleration/power.

Filed Jan 25, 2015 · Airbags, Driver assistance · 125,000 miles · GA

While driving my vehicle lost power slid on brakes, air bag light and stability light came on and stayed on.

Filed Oct 9, 2014 · Transmission · 135,000 miles · MI

As I slowed exiting a freeway about 35 MPH, I heard a screech & a bit of loss of power. When I attempted to put into reverse for parking (later) it was apparent it was the transmission. As I investigated on line it was an ongoing transmission problem due to "less than robust parts" inside the transmission. Gm dealer-service rep. John at zubor agreed with this and told me to contact gm since it was, just over the 100,000 mile powertrain warranty. It took gm two weeks or more to reply & return my calls & emails, when of course I was told a gm dealer must diagnose the problem--vehicle was already repaired at that point by my own mechanic. I do not have another form of transportation & since it is out of warranty I had no promise of gm assistance, I took it where I could! I paid $1850.00 for a new trans with warranty. I would not be writing except this is an ongoing problem & the gm tech on line said there was "nothing you could do to prevent this from happening since the interior parts are weak". Gm tech commented gm had began using more "robust parts for replacement, but due to high labor costs (interior parts) he suggested to replace trans so you would have a warranty". This is also what our mechanic advised. Please advise.

Filed Mar 3, 2013 · Driver assistance, Electrical · 137,509 miles · MO

The "stability control disabled" sensor comes on followed by "reduced engine power" and my vehicle won't go faster than 5mph. This has happened at least 6 times in the past several months only upon start up of the vehicle. Sometimes, if I wait a couple of minutes and restart my car, it'll start just fine but the check engine light comes on. I first brought it into hendrick chevrolet on 10/15/12. They charged me almost $700 to replace "app sensor assembly". Then I brought it in again on 11/6/12 for the same issue. They replaced the "connector at the throttle body" and charged me $223.09. The issue temporarily went away. I then brought it back on 12/20/12 with the same issue but this time the check engine won't turn off as a result of the reduced engine power-stability control disabled warning. They simply reset the warning and that was it. Til this day, I continue to have problem with this vehicle going into reduced engine power/stability control disabled. This has become a constant issue and thorn on my side and each time I bring it in for service, they always tell me it's something else. I have read many of the same issues other owners have had. Why haven't there been a recall on this???

Filed Oct 16, 2012 · Acceleration, Driver assistance · 136,000 miles · IN

While in the middle of driving, the "stability control disabled" sensor comes on followed by "reduced engine power" and my vehicle just shuts off. I have been fortunate the 4-5 times it has happened as I have been able to pull off the road, wait a couple of minutes and restart my car. I have already replaced a hub that my mechanic said was causing a "traction control" problem from earlier. I am reading online all of the nightmares and I unfortunately do not have thousands of dollars to keep trying to fix an issue that gmc is clearly aware of. I have 5 kids and frequently drive them around and someone is going to get hurt and I think gmc should take some responsibility.