GM Service Manual Online
For 1990-2009 cars only

Selector Switch Replacement 4WD Switch

Removal Procedure

    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.

  1. Disconnect the negative (-) battery cable.
  2. Remove two screws, two plastic retainers and the rear console box from the floor.
  3. Remove two screws, two plastic retainers and the front console from the floor.

  4. Object Number: 167065  Size: SH
  5. Remove one screw and the gearshift control lever knob (2) from the gearshift control lever.
  6. Remove eight screws, the boot cover and the gearshift control lever boot (1) from the gearshift control lever.
  7. Remove one clamp and the gearshift lever case boot from the gear shift lever case.

  8. Object Number: 167096  Size: SH
  9. Remove the gearshift control lever (2) from the gearshift lever case by pushing down on the gearshift control lever pivot and turning counterclockwise 90 degrees (1/4 turn) and lifting up.

  10. Object Number: 167506  Size: SH
  11. Disconnect the four-wheel drive switch electrical connector (1) from the four-wheel drive switch (2).
  12. Remove the four-wheel drive switch from the transfer case by turning counterclockwise.
  13. Inspect the four-wheel drive switch O-ring for cuts or other damage. Replace as necessary.

Installation Procedure

    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 four-wheel drive switch into the transfer case by turning clockwise.
  2. Tighten
    Tighten the four-wheel drive switch to 20 N·m (15 lb ft).


    Object Number: 167506  Size: SH
  3. Connect the four-wheel drive switch electrical connector (1) to the four-wheel drive switch (2).
  4. Install the gearshift control lever into the gearshift lever case, pushing down on the shift control lever pivot and turning clockwise 90 degrees (1/4 turn) and releasing.
  5. Install the gearshift lever case boot to the gearshift lever case. Secure the boot (3) with one clamp.

  6. Object Number: 167066  Size: SH
  7. Install the gearshift control lever boot (1) and the boot cover onto the gearshift control lever (2). Secure the boot and the cover with eight screws.

  8. Object Number: 167065  Size: SH
  9. Install the gearshift control lever knob (1) onto the gearshift control lever. Secure the knob with one screw.
  10. Install the front console box to the floor. Secure the front console box with two plastic retainers and two screws.
  11. Install the rear console box to the floor. Secure the rear console box with two plastic retainers and two screws.
  12. Connect the negative (-) battery cable.

Selector Switch Replacement 4WD Low Switch

Removal Procedure

    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.

  1. Disconnect the negative (-) battery cable.
  2. Raise the vehicle. Support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  3. Disconnect the four-wheel drive low switch electrical connector from four-wheel drive low switch.

  4. Object Number: 167508  Size: SH
  5. Remove the four-wheel drive low switch (4) from the transfer case by turning counterclockwise.
  6. Inspect the four-wheel drive switch 0-ring for cuts or other damage. Replace as necessary.

Installation Procedure

    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 four-wheel drive low switch into the transfer case by turning clockwise.
  2. Tighten
    Tighten the four-wheel drive low switch to 20 N·m (15 lb ft).


    Object Number: 167508  Size: SH
  3. Connect the four-wheel drive low switch electrical connector (3) to the four-wheel drive low switch (4).
  4. Lower the vehicle.
  5. Connect the negative (-) battery cable.