2011 Lacrosse Trunk Mysteriously Opens


Well-known member
S.W. Ontario Canada
Buick Ownership
2018 Regal Sportback - 2010 Yamaha R6 (track bike) Past cars: 92 LeSabre, 98 Regal, 02 GrandPrixGT
I am having the same issue. My fob sits on the counter overnight and the trunk pops up in my garage without any intervention. It just started doing this. It also randomly pops up when I pull a door to open it. I have never had a problem with my trunk in 7 years. Now it is popping up sporadically, without intervention, or reason.
Did you try a new battry ?


New member
Buick Ownership
My complaint regarding the sensitivity of the trunk button on the key fob for the 2011 Buick Lacrosse is valid. GM has addressed this same issue in other vehicles for many years now. They have gone so far as to put switches in trunks to prevent the key fob from opening it to significant delays on the key fob switch itself. Someone dropped the ball on this one. If it hasn't happened to you yet does not mean that it won't. Hopefully you will not have anything valuable in the trunk and/or will it be raining. This is a $33,000.00 automobile - not a $200.00 Ipod. I don't think my expectations are too high. Others have the same valid complaint as I.
I have the same issue with my 2012 LaCrosse. I've been told that I'm accidentally pressing the trunk button on the fob but that is not the case. I've had this vehicle for over 5 years without this issue until the past 3-4 months and it's getting worse. Buick dealership wants $140 just to diagnose it and $250 for a new fob. Very frustrating that something this stupid is gonna cost hundreds of dollars. I feel ur pain and am still looking for a solution. I cannot open the trunk manually and it randomly opens on it's own. Please help.
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