1999 buick leSabre manual trunk release

http://www.vadengmpp.com/owners-manual/buick/2002-Buick-Lesabre.pdf Look in section 2-16 and 17

Most trunk locks have a holding mechanism at the bottom edge of the trunk lid. Open lid, look at bottom edge. If you see a plate held in with two screws, remove screws, pry plate down to release lock cylinder.

Replacement parts are available. Check your local auto parts retailer, eBay, and Amazon.

could you open it with a key?when you try to open it with the remote,
do you hear the actuator ``knocking``?no..well the fuse,and the actuator has to be checked.

If it has the electric trunk release, the button could be in the glove box.
Otherwise you may have to remove the back seat to gain entry to the trunk.

Check in the glove box for a push button to open trunk. Also along the driver's side floor sill (between the seat and the door). Along the bottom of the dash on driver's side, check there too. My son has a '92 Lesabre, and there is no trunk release-only the key opens the trunk.

you could have a problem with the trunk motor not working.check voltages at the motor when using the remote.you could also have a problem with the remote that works the trunk release side of the remote.

http://playbreakit.com/manly-97-lesabre-remote-mirror/

Trunk reless relay ! Which year is right ? at the top is shows 1992 Buick . An it also has 2005 ? Which is it ?

Found lost bolt in spare tire well. But, learned it is a 6mm thread, 3/4" long with 10mm head