GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1997 🢒 Chevy P62 Commercial Chassis 🢒 Steering 🢒 Steering Wheel and Column 🢒 Dimmer Switch

Removal Procedure

    Object Number: 30623 Size: SH
  1. Disconnect the negative battery cable. Refer to

    Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

    in General Information.
  2. Remove the Torx washer head screw.
  3. Remove the ground ring terminal from the stud. Remove the hexagon nut.
  4. Remove the dimmer switch assembly from the dimmer switch rod.

Installation Procedure

    NOTICE: Ensure that all fasteners are securely seated before tightening to the specified torque value. Failure to do so may result in component damage or steering column malfunction.


    Object Number: 30623 Size: SH
  1. Install the dimmer switch assembly to the dimmer switch rod and the dimmer switch mounting stud.
  2. Install the ground ring terminal to the stud.
  3. Install the hexagon nut and the Torx washer head screw. Finger tighten only.

    4. Object Number: 30641 Size: SH
  4. Adjust the dimmer switch assembly.
    5. 4.1. Place a 3/32 inch drill bit in the hole on the switch in order to limit travel.
    4.2. Position the switch on the column and push against the dimmer switch rod in order to remove any free play.
    4.3. Remove the drill bit.

    Tighten
    Tighten the Torx washer head screw and the hexagon washer head screw to 4 N·m (35 lb in).

    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.

  5. Connect the negative battery cable.
  6. Inspect the dimmer switch assembly for proper operation.

    7. The dimmer switch should click from high beam to low beam and back.