GM Service Manual Online
For 1990-2009 cars only

Automatic Transmission Shift Lock Control Actuator Replacement Column Shift

  1. Remove the knee bolster bracket. Refer to Knee Bolster Replacement in Instrument Panel, Gauges and Console.
  2. Remove the steering column trim covers.

  3. Object Number: 420205  Size: SH
  4. Disconnect the automatic transmission shift lock control connector.

  5. Object Number: 420208  Size: SH
  6. Use a screwdriver to pry the automatic transmission shift lock control from the steering column support assembly.
  7. Remove the automatic transmission shift lock control from the steering column.

    Object Number: 420208  Size: SH
  1. Install the automatic transmission shift lock control.
  2. Put the column in the NEUTRAL position.


    Object Number: 324912  Size: SH
  3. Adjust the automatic transmission shift lock control.
  4. 2.1. Pull the tab (1) out on the block side (2) of the automatic transmission shift lock control.
    2.2. Shift the column into the NEUTRAL position.
    2.3. Press on the adjuster block (2) to compress the internal adjuster spring to disengage the adjuster teeth. Slide the adjuster block (2) as far away from the solenoid as possible.
    2.4. Shift the column into the PARK position.
    2.5. Lock in place by pushing the tab (1) back in.
  5. Inspect the automatic transmission shift lock control.

  6. Object Number: 420205  Size: SH
  7. Reconnect the automatic transmission shift lock control connector.
  8. Install the steering column trim covers.
  9. Install the knee bolster bracket. Refer to Knee Bolster Replacement in Instrument Panel, Gauges and Console.

Automatic Transmission Shift Lock Control Actuator Replacement Floor Shift

Removal Procedure

  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  2. Remove the center console. Refer to Front Floor Console Replacement in Instrument Panel Gauges and Console.

  3. Object Number: 190956  Size: SH
  4. Disconnect electrical connector from the shift lock control (2) for the automatic transmission (AT).

  5. Object Number: 442716  Size: SH
  6. Remove both ends of the AT shift lock control from pivot points (1).

Installation Procedure


    Object Number: 442716  Size: SH
  1. Install the upper clip of the AT shift lock control onto the upper pivot point, and the lower clip onto the lower pivot point.
  2. Install the center console. Refer to Front Floor Console Replacement in Instrument Panel, Gauges and Console.
  3. Install the electrical connector to the AT shift lock control.
  4. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.