Installation Procedure

WARNING: This page is about a different car, the 2003 Pontiac Aztek and 2003 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

Install the stop lamp switch (1) into the slotted grooves until switch is fully depressed against the brake pedal (2), then turn the switch clockwise approximately 1/4 turn, the switch should now be installed and adjusted.
Connect the electrical connectors.
Install the left side instrument panel insulator. Refer to CLOSEOUT/INSULATOR PANEL REPLACEMENT -- LEFT .
If necessary, adjust the stop lamp switch. Refer to STOP LAMP SWITCH ADJUSTMENT .

Fig 1: Installing Stop Lamp Switch From Brake Pedal Bracket
Courtesy of GENERAL MOTORS CORP.