The trunk release on my 2011 Buick Regal no longer opens the trunk.

The manual says there is a touch pad under the emblem.

https://www.manualslib.com/manual/538183/Buick-Regal.html?page=12

There is an Emergency release inside the trunk if you can reach in from the back seat. This page refers

https://www.manualslib.com/manual/538183/Buick-Regal.html?page=46#manual

https://www.manualslib.com/manual/538183/Buick-Regal.html?page=12

..

Visit the on-line store, know as reliable-store, they have the repair manuals. I'm sure you will get the solution of your problem.
Best Manuals

Check the rear compartment lid unlatch relay in the under hood fuse box . The open switch is an input to the BCM - body control module , when pushed the BCM applies B+ voltage to energize the relay sending B+ voltage to lid latch motor opening the trunk . If not the relay the BCM may be at fault . May have DTC'S - diagnostic trouble codes stored .

If that model has a fold down section of the rear seat back, the manufacturer normally installs an accessible manual boot release tab in the vicinity of the fold down seat section just inside the trunk compartment.

If there is no fold down seat in that model or no manual boot release inside the trunk area, the rear seat needs to be removed so that you can access the trunk from inside the car.

Do you have a button on the dash, or do you have a lever on the floor ?

Something broke on the lock mechanism. In order to open the trunk, you will have to remove the rear seats and try to access the trunk area. Once you are in the trunk, you should be able to manually open the lock and investigate what broke.

TRUNK WILL NOT OPEN

It can be trunk cable issue or the latch issue which gets open/close. It has to be inspected. =========

There are few relatively helps links with solutions to troubleshoot these problems. ---------

I suggest you to go through the links and confirm the issue: ------

Click the link below: ----

Trunk release Problem on Toyota Camry?

http://schematicsdiagram.blogspot.in/2012/02/trunk-release-problem-on-toyota-camry.html

-----------

Trunk button Not Working on Buick car?

http://schematicsdiagram.blogspot.com/2011/12/trunk-button-not-working-on-buick-car.html

----------

How to remove Trunk/Hatch Lock on Acura?

http://repairhelpcenter.blogspot.com/2011/11/how-to-remove-trunkhatch-lock-on-acura.html

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

How to Remove Trunk Lid on Acura Integra?

http://repairhelpcenter.blogspot.com/2011/11/how-to-remove-trunk-lid-on-acura.html

-----------

2005 Lexus SC430: Retractable hard top will not come down and Trunk will not open?

http://howtobyme.blogspot.in/2012/05/2005-lexus-sc430-retractable-hard-top.html

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

2000 Toyota Camry: Trunk will not Open?

http://technoanswers.blogspot.in/2012/04/2000-toyota-camry-trunk-will-not-open.html

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

These will help.

Thanks.

TRUNK WILL NOT OPEN

It can be trunk cable issue or the latch issue which gets open/close. It has to be inspected. =========

There are few relatively helps links with solutions to troubleshoot these problems. ---------

I suggest you to go through the links and confirm the issue: ------

Click the link below: ----
Trunk release Problem on Toyota Camry?

http://schematicsdiagram.blogspot.in/2012/02/trunk-release-problem-on-toyota-camry.html

-----------
Trunk button Not Working on Buick car?

http://schematicsdiagram.blogspot.com/2011/12/trunk-button-not-working-on-buick-car.html

----------
How to remove Trunk/Hatch Lock on Acura?

http://repairhelpcenter.blogspot.com/2011/11/how-to-remove-trunkhatch-lock-on-acura.html

-------------
How to Remove Trunk Lid on Acura Integra?

http://repairhelpcenter.blogspot.com/2011/11/how-to-remove-trunk-lid-on-acura.html

-----------
2005 Lexus SC430: Retractable hard top will not come down and Trunk will not open?

http://howtobyme.blogspot.in/2012/05/2005-lexus-sc430-retractable-hard-top.html

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

2000 Toyota Camry: Trunk will not Open?

http://technoanswers.blogspot.in/2012/04/2000-toyota-camry-trunk-will-not-open.html

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

These will help.

Thanks.

It can be trunk cable issue or the latch issue which gets open/close.It has to be inspected.=========
There are few relatively helps links with solutions to troubleshoot these problems.---------
I suggest you to go through the links and confirm the issue:------
Click the link below:----
Trunk release Problem on Toyota Camry? http://schematicsdiagram.blogspot.in/2012/02/trunk-release-problem-on-toyota-camry.html

-----------
Trunk button Not Working on Buick car? http://schematicsdiagram.blogspot.com/2011/12/trunk-button-not-working-on-buick-car.html

----------
How to remove Trunk/Hatch Lock on Acura? http://repairhelpcenter.blogspot.com/2011/11/how-to-remove-trunkhatch-lock-on-acura.html

-------------
How to Remove Trunk Lid on Acura Integra? http://repairhelpcenter.blogspot.com/2011/11/how-to-remove-trunk-lid-on-acura.html

-----------
2005 Lexus SC430: Retractable hard top will not come down and Trunk will not open? http://howtobyme.blogspot.in/2012/05/2005-lexus-sc430-retractable-hard-top.html

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

2000 Toyota Camry: Trunk will not Open? http://technoanswers.blogspot.in/2012/04/2000-toyota-camry-trunk-will-not-open.html

------------
These will help.
Thanks.

Yikes! You may need to remove the rear seat of the vehicle and trip the trunk latch from the inside.