GM Service Manual Online
For 1990-2009 cars only

Special Tools

J-42759 Ignition Switch Connector Release Tool

Removal Procedure

  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection.
  2. Warning: Refer to SIR Warning in the Preface section.

  3. Disable the SIR system. Refer to SIR Disabling and Enabling.
  4. Remove the hush and knee bolster. Refer to Driver Knee Bolster Bracket Replacement.
  5. Remove the steering column trim covers. Refer to Steering Column Trim Covers Replacement.
  6. With the key installed, turn the key to the RUN position.

  7. Object Number: 1413814  Size: SH
  8. Install an allen wrench into the hole on top of the lock cylinder housing.
  9. Push down on the allen wrench to release the tab on the lock cylinder inside the lock cylinder housing.


    Object Number: 1413837  Size: SH
  10. Slide the lock cylinder out of the lock cylinder housing.
  11. Disconnect the passlock and key buzzer from the lock cylinder housing.

  12. Object Number: 1413831  Size: SH
  13. Insert J-42759 into the lock cylinder housing to release the tabs on the ignition switch.
  14. Pull the ignition switch out of the lock cylinder housing.
  15. Disconnect the connector from the ignition switch.

Installation Procedure


    Object Number: 1413832  Size: SH

    Note: The gears between the ignition switch and the lock cylinder housing must be in the correct position. Failure to do so will cause a misalignment of the gears in the ignition switch and the lock cylinder housing, which may result in a NO START or BATTERY DRAIN.

  1. Verify the alignment of the gear (1) in the ignition switch (2). If gear (1) not in position shown, turn gear in ignition switch (2) until you reach the correct position.

  2. Object Number: 1413833  Size: SH
  3. Use a screwdriver to rotate the lock cylinder housing gear counterclockwise until it hits a stop.
  4. Connect the connector to the ignition switch.

  5. Object Number: 1413834  Size: SH
  6. Insert the ignition switch into the lock cylinder housing. The tabs (2) on the ignition switch MUST be seated inside the lock cylinder housing (1) for proper installation.

  7. Object Number: 1413835  Size: SH
  8. Use a screwdriver to rotate the lock cylinder housing gear clockwise to the START position allowing it to spring return into the RUN position.

  9. Object Number: 1413837  Size: SH
  10. Align the lock cylinder and install the lock cylinder into the lock cylinder housing.
  11. Connect the passlock and key buzzer into the lock housing.
  12. Install the steering column trim covers. Refer to Steering Column Trim Covers Replacement.
  13. Install the hush and knee bolster. Refer to Driver Knee Bolster Bracket Replacement.
  14. Enable the SIR system. Refer to SIR Disabling and Enabling.
  15. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection.