Two problems related to service brakes have been reported for the 2009 GMC Sierra 1500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2009 GMC Sierra 1500 based on all problems reported for the 2009 Sierra 1500.
Stability control. The stabilitrack warning appears. All of the gauges go to zero, the power locks engage and disengage, the engine revs and the driver loses control of the truck. This is an extremely dangerous problem. The dealership can't find anything wrong because no codes are showing. This needs to be a major recall. It's a common problem, google it and see how many people have the same issue with no resolution. Force gm to address and resolve this known issue.
2009 GMC Sierra 1500. The consumer stated it felt as though the brakes were dragging when coming to a stop or a light. The consumer stated the problem became progressively worse, particularly when turning. The vehicle was taken to the dealer, but they were unable to find a problem. He returned to the dealer, a month later, and still no problem was found. The consumer replaced the brake fluid, and it resolved the problem for a short while.