[vicv]

I have a 97 Sable, it's most likely similar. Open the trunk and remove the liner from around the rear. There are plastic clips holding the liner in place. Once the liner is out you should see the nuts holding the lens assembly in place. There are more than you may think so don't get hasty and pull too hard on the lens assy. One is behind the rear wheelwell and that one took me a while to find, I had to remove the liner near the CD player. Once you remove the lens assy you just twist the bulb holder to remove the bulb. Replace the bulb(s) and reinstall. Good luck.....