Hello jlc8404,I have seen various posts about the issue of trunks opening on their own. The usual initial conclusion is this must be caused by accidentally pressing the trunk release button on the remote. I thought so too, and initially attributed the problem on my 2011 Regal to this. I realized this was not the problem one night when I was awakened with the panic alarm sounding, the trunk open and my keys on the dresser - unable to have been pushed accidentally. This was the only time the panic alarm sounded when the trunk opened on its own, by the way. Since then the dealerships has tried
1) replacing the trunk switch
2) reprogramming the electronics
3) giving me new remotes
4) changing the frequency of the remote signal to rule out some other device was setting off mine.
5) installing a 2-second hold on the trunk release button to tule out accidental pushing of the fob
6) installing a 2-push on the trunk release button to rule out accidental pushing of the fob yet again
None of these things affected the problem at all. The trunk would open seemingly randomly intermittently when the car was parked and locked. It sometimes took 8 weeks for the problem to recur - but it always did. After 2 years of the dealership and the GM field engineer (who took over the case from the dealership), and 11 instances of the trunk opening on its own, GM replaced my 2011 Regal with a new 2013 Regal. Paul Meade, the GM field engineer said GM was seeing this problem across a line of GM vehicles, not just mine. I was told by Lekeia Williams in the GM Executive Office Department, that while the problem was across a line of GM vehicles (it was never specified what exactly the line was), GM was not seeing this problem past model year 2011. Ten days after I got my new 2013 Buick Regal Turbo from GM's adjustment, the trunk on the 2013 Regal opened on its own. The dealership has installed a work around - a switch that disables the solenoid so I can totally prevent the trunk from opening. But sadly, GM seems totally unable to figure out what is causing this problem or to provide an actual fix for it. When GM replaced my 2011 Regal with the 2013 Regal, I was told by Lekeia Williams that she was told that GM could not solve this problem. So it persists over more than 2 years with 2 different Regals with GM no closer in understanding than it was 2 years ago. The last thing GM wanted to do was totally remove the trunk release button from my remote and see if the problem still occurred. To me that is like going onto step 7 of a troubleshoot and then going back and providing another alternative for step 1 of the troubleshoot, when step 1 has already been determined to not be the problem. I told GM they could try this on the 2011 Regal I returned to them, instead of using me as a guinea pig. I have not heard back from them.
I am sorry to hear about this ongoing issue you are experiencing! It sounds very frustrating. I would like to review your case if I may. Has a customer service agent given you a service request number? If so, may I have the number so I can look further into this for you? If you do not have a service request number, would you be able to provide me with your name and VIN? Thank you!
Buick Customer Care