Any resolution to this problem? I also have a 2007 G5 and my lights won't turn off sometimes.
I would like to apologize for the issues that you have experienced with your G5. I would suggest that you have your local GM dealer look into this for you. They would be in the best position to assist you in getting this issue diagnosed. Please keep me posted on this and if you have any other questions, comments or concerns please feel free to contact me anytime.
Stacy GM Customer Service