GM Service Manual Online
For 1990-2009 cars only

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. Disconnect the electrical connector to the mode actuator that is located on the left side of the air distribution case.

  3. Object Number: 258020  Size: SH
  4. Remove the screws.
  5. Remove the adjuster links from the control lever.
  6. Remove the mode actuator.
  7. Adjust the mode actuator by completing the following steps:
  8. 6.1. Connect the electrical connector to the actuator.
    6.2. Turn the ignition switch to the RUN position.

    Allow the self-positioning of the actuator.

    6.3. Turn the ignition switch to the OFF position.
    6.4. Remove the actuator from the electrical connection.

Installation Procedure


    Object Number: 258020  Size: SH
  1. Install the mode actuator.
  2. Install the screws.
  3. Install the adjuster links to the control lever.
  4. Connect the electrical connector.
  5. Connect the negative battery cable.
  6. Test the circuit operation.