Installation Procedure

WARNING: This page is about a different car, the 2003 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.

Connect the electrical connector (4) to the high mounted stop lamp assembly.
Position the high mounted stoplamp assembly to the inner roof panel.
Push upward in order to engage the retainers (2) securing the mounted stoplamp assembly (1) to the inner roof panel.

Fig 1: Installing High Mounted Stop Lamp
Courtesy of GENERAL MOTORS CORP.