GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 30625  Size: SH
  1. Remove the dimmer switch. Refer to Dimmer Switch.
  2. Remove the two washer head screws.
  3. Remove the ignition switch assembly from the cable and actuator assembly.
  4. Disconnect the vehicle wire harness at the ignition switch.

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: 30644  Size: SH
  1. Move the lock cylinder set to the OFF/LOCK position.
  2. Important: The solenoid will get hot during adjustment and inspection procedures.

  3. Adjust the ignition switch assembly.
  4. 2.1. Move the switch slider to the extreme right position.
    2.2. Move the switch slider one detent to the left of the OFF/LOCK position.
    2.3. Install a 3/32 inch drill bit in the hole on the switch in order to limit travel.

    NOTICE: Install the ignition switch to the cable and actuator assembly with the switch in the OFF/LOCK position. The new ignition switch will be pinned in the OFF/LOCK position. Remove the plastic pin after the switch is assembled to the column. Failure to do so may cause switch damage.


    Object Number: 30625  Size: SH
  5. Install the ignition switch assembly.
  6. Install the two washer head screws.
  7. Tighten
    Tighten the washer head screws 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.

  8. Remove the drill bit from the ignition switch.
  9. Install the dimmer switch. Refer to Dimmer Switch.
  10. Connect the vehicle wire harness connector to the ignition switch.

  11. Object Number: 30646  Size: SH
  12. Check the interlock solenoid assembly for proper function.
  13. 8.1. The solenoid must lock the gearshift lever bowl assembly whenever the steering column in the P (Park) and when trying to shift from P (Park) without pressing the brake pedal (the solenoid is energized).
    8.2. The solenoid must release the gearshift lever bowl assembly when pressure is applied to the brake pedal (the solenoid is de-energized).
    8.3. Make any necessary adjustments.