GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 Envoy - 4WD 🢒 Steering 🢒 Steering Wheel and Column - Tilt 🢒 Ignition Lock Cylinder Replacement - On Vehicle

Removal Procedure
  1. Disconnect the negative battery cable. Refer to Engine Electrical.

    2. Caution: Refer to SIR Caution in the Preface section.

  2. Disable the SIR system. Refer to Disabling the SIR System in SIR.
  3. Lower the hush and knee bolster. Refer to Knee Bolster Replacement in Instrument Panel.
  4. Remove the steering column trim covers. Refer to Steering Column Trim Cover Replacement - On Vehicle .
  5. With the key installed, turn the key to the RUN position.

    6. Object Number: 1413814 Size: SH
  6. Install an allen wrench into the hole on top of the lock cylinder housing.

    7. Push down on the allen wrench to release the tab on the lock cylinder inside the lock cylinder housing.


    Object Number: 1413837 Size: SH
  7. Slide the lock cylinder out of the lock cylinder housing.

Installation Procedure

    Object Number: 1413835 Size: SH
  1. Install the key into the lock cylinder.

    2. Important: 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.

  2. Use a screwdriver to rotate the lock cylinder housing gear clockwise to the start position - allowing it to spring return into the RUN position.

    3. Object Number: 1413837 Size: SH
  3. Align the lock cylinder and install into the lock cylinder housing.
  4. Install the steering column trim covers. Refer to Steering Column Trim Cover Replacement - On Vehicle .
  5. Install the hush and knee bolster. Refer to Knee Bolster Replacement in Instrument Panel.
  6. Enable the SIR system. Refer to Enabling the SIR System in SIR.
  7. Connect the negative battery cable. Refer to Engine Electrical.