GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2003 🢒 Astro - 4WD 🢒 Preface 🢒 Cautions and Notices 🢒 Ignition Lock Cylinder Replacement

Removal Procedure

    Object Number: 415299 Size: SH

    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 battery negative cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.

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

  2. Disable the SIR system. Refer to SIR Disabling and Enabling in SIR.
  3. Position the steering wheel half way between the upper and lower tilt stops.
  4. Remove the lower steering column trim cover. Refer to Steering Column Trim Covers Replacement .
  5. Remove the upper steering column trim cover (2) mounting screws (1).
  6. Lift the upper steering column trim cover to gain access to the lock cylinder access hole.

    7. Object Number: 375310 Size: SH
  7. Using a bent tip awl, insert the tip into the ignition lock cylinder access hole.

    8. Object Number: 375316 Size: SH
  8. Turn the ignition lock cylinder to the START position.
  9. Using the bent tip awl, push down on the ignition lock cylinder retaining pin.
  10. Release the ignition lock cylinder to the RUN position.

    11. Object Number: 375305 Size: SH
  11. Remove the ignition lock cylinder from the ignition lock cylinder case by pulling the ignition lock cylinder away from the steering column.

Installation Procedure

    Object Number: 375309 Size: SH
  1. Insert the ignition lock cylinder through the upper shroud.
  2. Install the ignition lock cylinder to the ignition lock cylinder case by performing the following procedure:
    3. 2.1. Align the slots on the ignition lock cylinder case assembly to the tabs on the ignition lock cylinder.
    2.2. Push the ignition lock cylinder into the ignition lock cylinder case assembly until the locking tab locks against the ignition lock cylinder case.

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 415299 Size: SH
  3. Install the mounting screws to the upper steering column trim cover.

    4. Tighten
    Tighten the screws to 1.5 N·m (13 lb in).

  4. Install the lower steering column trim cover. Refer to Steering Column Trim Covers Replacement .
  5. Enable the SIR system. Refer to SIR Disabling and Enabling in SIR.
  6. Connect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  7. Perform the Passlock learn procedure. Refer to Programming Theft Deterrent System Components in Theft Deterrent.