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For 1990-2009 cars
Makes 🢒 Chevrolet 🢒 2005 🢒 C-Series Medium Duty Truck C6/7/8 - Mexico 🢒 Engine 🢒 Engine Electrical 🢒 Ignition and Start Switch Replacement

Ignition and Start Switch Replacement On Vehicle

Removal Procedure

    Object Number: 636625 Size: SH
  1. Remove the steering column filler panel.

    2. Object Number: 378830 Size: SH
  2. Remove the hexagon nut (4) from the dimmer and ignition switch mounting stud.
  3. Remove the dimmer switch rod (5).
  4. Remove the washer head screw (3).
  5. Remove the dimmer switch assembly (2) from the ignition switch actuator assembly (1).

    6. Object Number: 378838 Size: SH
  6. Remove the dimmer and ignition switch mounting stud (3).
  7. Remove the ignition switch assembly (2) from the steering column jacket assembly (1).

Installation Procedure

    Object Number: 378838 Size: SH
  1. Install the ignition switch assembly (2) onto the steering column jacket assembly (1).

    2. 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.

  2. Install the dimmer and ignition switch mounting stud (3).

    3. Tighten
    Tighten the stud to 4 N·m (35 lb in).


    Object Number: 378830 Size: SH
  3. Guide the rod (5) into the switch and install the dimmer switch assembly (2) onto the ignition switch actuator assembly (1).

    4. 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.

  4. Install the washer head screw (3).

    5. Tighten

        • Tighten the screw to 4 N·m (35 lb  in).
        • Tighten the nut to 4 N·m (35 lb in).
  5. Install the hexagon nut (4) onto the dimmer and ignition switch mounting stud.

    6. Object Number: 636625 Size: SH
  6. Install the steering column filler panel.

Ignition and Start Switch Replacement Off Vehicle

Removal Procedure

    Object Number: 367831 Size: SH
  1. Remove the dimmer switch assembly. Refer to Dimmer Switch Replacement in Lighting Systems.
  2. Remove the hexagon nut (3).
  3. Remove the washer head screw (2).
  4. Remove the ignition switch assembly (1) from the ignition switch actuator assembly.
  5. Remove the ignition switch assembly (1).
  6. Remove the dimmer and ignition switch mounting stud (4).

Installation Procedure

    Object Number: 367831 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 dimmer and ignition switch mounting stud (4).

    2. Tighten
    Tighten the dimmer and ignition switch mounting stud to 4 N·m (35 lb in).

  2. Install the ignition switch assembly (1) to the ignition switch actuator assembly.
  3. Install the ignition switch assembly (1) onto the dimmer and ignition switch mounting stud (4).
  4. Install the washer head screw (2) into the ignition switch assembly (1).
  5. Tighten the washer head screw (2) finger tight.
  6. Install the hexagon nut (3) onto the dimmer and ignition switch mounting stud (4)
  7. Tighten the hexagon nut (3) finger tight.

    8. Object Number: 358702 Size: SH
  8. Move the ignition switch assembly slider (2) to the far right position.
  9. Move the ignition switch assembly slider (2) detent to the left. This is the "OFF LOCK" position.
  10. Install a 3/32 inch drill bit into the hole on the ignition switch assembly (1) to limit travel.
  11. Push against the ignition switch actuator assembly to limit all the lash.
  12. Install the dimmer switch assembly. Refer to Dimmer Switch Replacement in Lighting Systems.