Stop Lamp Switch Adjustment

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

With the brake pedal in the fully released position, ensure that the stop lamp plunger is fully depressed against the brake pedal shanks.
Fully insert the stop lamp switch and the cruise control switch, if equipped, into the brake pedal bracket.
Push the brake pedal forward in order to set the brake push rod into the booster.

Fig 1: Pushing Brake Pedal Forward To Set Brake Push Rod Into Booster
Courtesy of GENERAL MOTORS CORP.

NOTE: Proper stoplamp switch adjustment is essential. Improper stoplamp switch adjustment may cause brake drag, heat buildup and excessive brake lining wear.
Pull the brake pedal to the rear, against the internal stop. This adjusts both the stop lamp switch and the cruise control switch.

Fig 2: Pulling Brake Pedal To Rear Against Internal Stop
Courtesy of GENERAL MOTORS CORP.
Inspect the stop lamp switch for proper adjustment.