If you can not remove fasteners from outside of trunk you must make a cut-out inside of trunk so you can get your hand to access bulbs.
check the bulbs?
You may need a new flasher.
If you can not remove fasteners on outside, you may need to cut a section out of the inside of trunk to get your hand by the bulbs.
you need to remove the inside panel to get to these bulbs
Sounds like the light bullb\bulbs for you gauger cluster is out. You will have to remove the cluster to get to the back of this to change the lights.
Changing a headlight bulb in a 2007 Buick Lacrosse can be done easily. Just remove the cover piece and change the bulb.
Change brake light bulbs Just remove the rear license plate. You can change the backup lights and brake light easily.
They are located inside the trunk lid, underneath the felt lining. You need to unsnap and pull back the felt lining to access the bulbs for the license plate light.
From the outside of the car.. Just un-screw the two screws and change the bulb.
From inside the trunk,twist the socket counterclockwise to remove the socket...
How do you change a rear license plate bulb on a 2001 Buick Century?you have to remove the complete light panel from the truck lid and it's simple. there are about 8 wing nuts on the inside of the truck lid you unscrew, and then the panel just pullsout giving you access to the 2 sockets for the license plate bulbs. Just unscrew each socket counterclockwise, pull out the bulb and push in the new one. Then put the light panel back on the trunk and screw all the wing nuts back on.