One problem related to brake light on has 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.
The parking brake light turns on randomly, when just starting the vehicle, when just sitting in the parkinglot before moving, while driving, but mainly while slowing down. . . . While using the brakes. I have taken it to the dealership 4 or 5 times now, and they cant reproduce the problem in their shop, so they dont know how to fix it. It is getting worse now. Flashing and dinging when slowing down on the highway, or when going down hill. I am worried that it may trigger something, like the brakes. The dealership has worked with me, still "trying" to fix even after my warantee has expired. I also have the dash crack issue too . And is very concerning being on the rim of the air bag . This needs to be looked into and not wait til something bad happens. Be proactive, not reactive.