GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Notice: When removing or installing the backup lamp switch, do not use an open end wrench. Use only a socket in order to avoid damage to the switch assembly.


    Object Number: 818085  Size: SH
  1. Disconnect the backup lamp connector.
  2. Remove the backup light switch assembly.

Installation Procedure

Notice: When removing or installing the backup lamp switch, do not use an open end wrench. Use only a socket in order to avoid damage to the switch assembly.


    Object Number: 623142  Size: SH

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  1. Install the backup light switch with a new gasket.
  2. Tighten
    Tighten the switch to 40 N·m (30 lb ft).


    Object Number: 623139  Size: SH
  3. Connect the backup lamp connector.