This is the 2nd GMC Yukon with a faulty drivetrain I've acquired in 3 years. Both occasions were directly after the vehicle had professional service done related to the faulty system. The transmissions was fully serviced at reputable repair shops and within a month or 2, without warning, the transmissions started having mechanical issues without DTC being triggered. As well as a 2004 Buick Rendezvous with less than 70k miles on it. The 2001 GMC Yukon suddenly lost reverse and park while driving and imploded the transmission in the process. The 2004 Buick Rendezvous started slipping and ceased to move by it's own power when at operating temperature. The 2006 GMC Yukon Denali stopped shifting gears while on the freeway at 55 mph and systematically lost all moving gears within a day also while at operating temperature.

- Auburn, CA, USA

It happened repeatedly now while driving on freeway the steering would get sloppy at random moments and keeping the vehicle in its lane becomes difficult. I replaced tie rods inner & outer, upper/lower ball joints pitman arm and idler, swaybar links shocks/struts. I even had two different mechanics look at the steering components. Both said everything is in good shape. This only happens at freeway speeds. I bought this truck a month ago

- Winlock, WA, USA

Known problem, brake failure due to rusted brake lines. Nearly had a rear emd collision when they failed trying to stop at 50 mph. A large truck was disabled in the middle of the road. I swerved into the left lane, since I couldn stop.

- Unicoi, TN, USA

Bonddogbonddog August 2006 edited June 2015 in GMC I purchased my 2006 Yukon last September 2005. I now have 24,000 miles on it. Over the last month I have had it into the dealer three times for the same problem. The problem is that while driving the vehicle it will suddenly lose almost all power. The information center will display the messages: "stability control disabled", "engine power reduced". and the vehicle will not go over 20 mph on a level surface and bearly 3 mph up a moderately steep hill. Each time I have had it into the dealer for repair they have beeen stumped by what the cause of the problem is. They said that GM/GMC told them that "GM is aware of the problem but does not have a fix for it at this time". how can a manufacturer sell a vehicle that has a defect and not have a fix for it? when the power goes out in a busy intersection or on a highway this is a major safety issue. Has anyone else experienced this problem. Thanks, [xxx] parts of this document have been redacted to protect personally identifiable information pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Victorville, CA, USA

The rear tailgate actuator quit working. The remote nor the key would unlock the rear tailgate. This quit working with no warning and no prior issues. Also the remote controls have had to be re-keyed many times. The vehicle was taken to the dealer and was the actuator originally replaced under warranty. I received a call from the dealer the next day stating the service adviser "made a mistake" and the $495 was in fact not under warranty. This would indeed have led to very an unfortunate ending had I been driving and/or with passengers and an incident occurred. Now I read that many other GMC owners have been experiencing the same for months.

- Santa Clarita, CA, USA

Broken, snapped off exhaust manifold bolts. Cause lean condition, and service engine soon light to come on.

- Hercules, CA, USA