GM Service Manual Online
For 1990-2009 cars only

Notice: Proper stoplamp switch adjustment is essential. Improper stoplamp switch adjustment may cause brake drag, heat buildup and excessive brake lining wear.

Important: Adjust the stoplamp switch and the cruise control switch at the same time. The adjustment procedure for both switches is identical. Refer to Cruise Release Switch Adjustment in Cruise Control, in order to adjust the cruise control release switch.

With the brake pedal in the fully released position, ensure that the stoplamp plunger is fully depressed against the brake pedal shanks.

  1. Insert the stoplamp switch and the cruise control switch (if equipped) into the brake pedal bracket.
  2. Push the brake pedal forward in order to set the brake push rod into the booster.

  3. Object Number: 179284  Size: SH
  4. Pull the brake pedal to the rear, against the internal stop. This adjusts both the stoplamp switch and the cruise control switch.

  5. Object Number: 179286  Size: SH
  6. Inspect the stoplamp switch for proper adjustment. For diagnosis of the stoplamps, Refer to Exterior Lights System Check in Lighting Systems.