1998 Pontiac Grand Prix

The high-mounted stoplamp is in the center of the rear window and lights whenever the brake pedal is depressed and the stoplamp switch is closed. The bulbs are accessed from inside the trunk.

Open the trunk.
If equipped with a slotted vent panel, remove it from the access opening by squeezing the ends and pulling down.
Reach through the access opening and turn the bulb socket 1/4 -turn counterclockwise to remove the socket. Most applications will use two sockets/bulbs. Verify that the correct bulb is being replaced.
Replace the bulb as required.

This Grand Prix had a slotted vent panel covering the high-mounted stoplamp assembly. Squeeze the ends to remove or install..