Need to replace turn signal bulb(s) on left side. The right side works fine. Left side won't flash.
How to access turn signal bulbs on 1995 Buick LeSabre
To replace the turn signal bulbs in the front or the rear you will need to remove the lens assembly. In the rear the mounting wing nuts are in the trunk and in the front you may need to remove the headlight assembly to get the turn signal lens out.