2011 Lacrosse Trunk Mysteriously Opens

[pogster]

Try this or trade to a Lexus.

 

[misterfixit]

Try this or trade to a Lexus.

I know I can cut that wire but for an auto that costs $32,000 one shouldn't have to.

 

[92sub]

DON'T CUT THAT WIRE!

Doing what is suggested in the link will disable your trunk pressure pad switch NOT the remote FOB function as was implied.

Good FYI for those planning on using the internet to modify something.....get 2, 3 or more verifications prior to acting. Lots of bad intel out here.

Based upon the wiring design, the only way to disable trunk operation would be to intercept the wire going to the trunk solenoid relay. This would inhibit ALL trunk release options as there is no way to separate remote from pressure pad activation. It looks like the wire harness may have a 'loop' wire for just such a design......more research is required to determine if the 'loop' extends somewhere convenient to put a lock out switch. Based soley upon the schematic I can't tell if the loop runs 1 inch or 10 feet from the fuse/relay center.

 

[misterfixit]

DON'T CUT THAT WIRE!

Doing what is suggested in the link will disable your trunk pressure pad switch NOT the remote FOB function as was implied.

Good FYI for those planning on using the internet to modify something.....get 2, 3 or more verifications prior to acting. Lots of bad intel out here.

Based upon the wiring design, the only way to disable trunk operation would be to intercept the wire going to the trunk solenoid relay. This would inhibit ALL trunk release options as there is no way to separate remote from pressure pad activation. It looks like the wire harness may have a 'loop' wire for just such a design......more research is required to determine if the 'loop' extends somewhere convenient to put a lock out switch. Based soley upon the schematic I can't tell if the loop runs 1 inch or 10 feet from the fuse/relay center.

Cutting it may affect your warranty also. I'm still waiting on Buick for an answer - though I will probably not get one.

I have seen the wiring diagram for the pressure switch above the license plate, trunk release relay and the trunk solenoid but I haven't seen the one for the remote activation of the trunk release relay. I have been debating buying the factory service manual.

 

[92sub]

Remote operation is performed through data communication. The remote module 'tells' the body control module to open the trunk through a CAN data line. Thats why any attempt at disabling the trunk would disable ALL attempts.

 

[misterfixit]

GM Engineers?

 

[buried20kleague]

The fob design is my biggest complaint with this vehicle. I too have had walked out of my office only to find my trunk wide open for who knows how long. It's sort of a running joke here in the office when someone sees it open, even.

I've come to having to empty my pockets while here in the office, which completely negates the whole idea of my push-button start not requiring me to fiddle with my key fob at any point.

My other MAJOR complaint is that my driver's seat only occasionally decides to go to it's poisition upon entry into the car. I've resigned myself to having to manually push the 1 button most times I enter the car, since my dealer attemped a fix that didn't change the issue. But that's a story for another day.

 

[InfiniteImp]

My other MAJOR complaint is that my driver's seat only occasionally decides to go to it's poisition upon entry into the car. I've resigned myself to having to manually push the 1 button most times I enter the car, since my dealer attemped a fix that didn't change the issue. But that's a story for another day.

This was a known issue with the 2010. I had it. They ended up replacing a module and it's been fine since. I posted about it on Nov.16, 2010. Here's the text, hope it helps you.

---------------

I went to the dealer last week with the PI0187/PI0187A bulletin, and he worked based on that. There is now a PI0187B (note the second letter is the letter I, not the number 1)

The fix was done and I can confirm that the seat now returns to the driving position 100% of the time after having been moved back by the 'driver seat easy exit' functionality. I waited this long to be REALLY sure it's working!

Here's what it said on the work order:

Complaint:
Memory seat feature inop when door opened..parts ordered
Scan for codes. None. Check bulletins. Find PI0187B for this complaint.
Instructs to replace MSM with updated part

Correction:
Replace MSM as per PI0187B and program. Program code A8603.
Customer to monitor

Parts:
FP Number: 13577747
Description: Module 115580

 

[duck]

Since, Buick has known about the seat problem since 2010 you whould think
they whould build the 2011 with a different seat module with the TSB they have
out i have the same problem with my 2010 it works 50% but i am afraid if i take it back to the dealer which is over a hour round trip and its works
they will not put the new module in because it works??????

 

[InfiniteImp]

Since, Buick has known about the seat problem since 2010 you whould think
they whould build the 2011 with a different seat module with the TSB they have
out i have the same problem with my 2010 it works 50% but i am afraid if i take it back to the dealer which is over a hour round trip and its works
they will not put the new module in because it works??????

From what I've been reading, depends on the dealer. My dealer just did the job even when I told them that it was intermittent. I pulled out that TSB (referred above) and they just did the work. Other forum members said their dealer wouldn't do the job without seeing the failure happen.

I figure, if there is a known TSB for this, they should be willing to do the work without reproducing the issue especially if the TSB indicates it's an intermittent problem.

 

[DonRican]

I found the answer and a workaround to this myself. It is the keyfob which engages when in my pant pocket. I now walk around with the key fob in my shirt pocket and it hasn't happened since. I was in denial for a while thinking it was something to do with the car but it would never happen to my wife. With all the keys and change in my pocket, sitting down caused one of them to hit the trunk button. They need to be designed for this reality of life.

 

[misterfixit]

I found the answer and a workaround to this myself. It is the keyfob which engages when in my pant pocket. I now walk around with the key fob in my shirt pocket and it hasn't happened since. I was in denial for a while thinking it was something to do with the car but it would never happen to my wife. With all the keys and change in my pocket, sitting down caused one of them to hit the trunk button. They need to be designed for this reality of life.

It seems Buick (GM) is not interested in fixing this problem.

 

[pogster]

I think you are right. Perhaps this is the appropriate time to give this a rest.

 

[misterfixit]

I think you are right. Perhaps this is the appropriate time to give this a rest.

I am posting about what I think is a legitimate problem that I and others are experiencing with the remote trunk release function on the key fob for the Lacrosse. I was under the assumption that this forum was a place where one could post his/her concerns for others to read, including GM, and to see if there is a solution or to find a solution for the concern.

I am sorry if this thread bothers you to the point of telling me to "give it a rest". I am certain that you would not "give it a rest" if you were having the same problem.

 

[pogster]

What may be a problem for you is not always a problem for everyone else. Personally I like it the way it is and have never had the trunk pop open. For whatever reason GM has decided to design the fob the way it is but to repeatedly expect GM engineers to come on here and offer you a solution is unrealistic. This is a Lacrosse user forum where we try to help one another but can do nothing to sway the engineers at GM. If I was having a problem I'd be at the dealership or contacting GM directly instead of expecting an answer from GM on an internet discussion forum. You've been offered help by BCS and supposedly by the dealership but it would seem by your lack of acknowledgment or confirmation you haven't sought any of those suggestions or simply ignored them. It should be apparent by now your expectations of getting a response from an engineer on these forums to make changes tailored to your needs is not going to happen.

 

[misterfixit]

What is a problem for me may not be a problem for you but it seems to be a problem for others. I have been to the dealer and have contacted BCS (GM). The dealer replaced the switch above the license plate and stated that there was nothing that they could do about the key fob function unless BCS (GM) addressed it. BCS (GM) is not willing to address the problem.

If this thread bothers you then I suggest that you ignore it.

 

[pogster]

If you know GM is not willing to address the problem then you are at a dead end. That should be the end of the story.

 

[FiftysLost]

What is a problem for me may not be a problem for you but it seems to be a problem for others. I have been to the dealer and have contacted BCS (GM). The dealer replaced the switch above the license plate and stated that there was nothing that they could do about the key fob function unless BCS (GM) addressed it. BCS (GM) is not willing to address the problem.
If this thread bothers you then I suggest that you ignore it.

I agree it WAS a problem. FOB buttons should have been recessed a little. In case you missed my earlier post I have not had a problem with the trunk since I bought this
http://www.ebay.com/itm/Carbon-Fibe...parel_Merchandise&vxp=mtr&hash=item20b91310f6
Solved my trunk problem completely.

 

[misterfixit]

Thanks FiftysLost but I have to use the fob to lock and unlock the doors and the key to start it. It looks like it would be kind of aggravating to use.

Pogster, as I stated earlier if my posts bother you then ignore them. I don't tell you what you can and can't post.

The dealer replaced the trunk switch above the license plate. Even if it was bad it wouldn't cause the trunk to open with the doors locked. The technician also left his fingerprints and smudges all over the trunk and left a nice scratch on the door jamb on the drivers side.

I paid 32 grand for the car. GM should address the problem with the remote trunk release function.

 

[InfiniteImp]

For what it's worth, I have yet to accidentally have the trunk open in 1.5 years of ownership. Keys are always in my pocket so you'd think if this was to be caused by something accidentally hitting the trunk release button, it would have happened by now.

I'm starting to think that maybe there's something up with your fob making it more sensitive to the trunk release activation than would be considered normal.