GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2005 🢒 Grand Am 🢒 Body 🢒 Instrument Panel, Gages, and Console 🢒 Ignition Switch Lock Cylinder Replacement

Removal Procedure

    Object Number: 737491 Size: SH

    Important: Perform the body control module (BCM) theft deterrent relearn procedure whenever you replace the ignition switch lock cylinder.

  1. Disconnect negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  2. Remove instrument panel (I/P) accessory trim plate. Refer to Instrument Panel Accessory Trim Plate Replacement .
  3. Insert the key to the ignition lock cylinder.
  4. Remove the ignition lock cylinder from the switch:
    5. 4.1. Using a small curved tool or an L-shaped hex wrench, depress and hold the detent on the ignition lock cylinder. If you cannot locate the detent with the tool, remove the radio. View the detent through the radio opening. Refer to Radio Replacement in Entertainment.
    4.2. Turn the key to the ON/RUN position.
    4.3. Pull the ignition lock cylinder out with the key.
  5. Remove the key from the lock cylinder.
  6. If the cylinder does not rotate or is seized, follow the procedure in the ignition switch replacement. Refer to Ignition and Start Switch Replacement .

Installation Procedure

    Object Number: 1055856 Size: SH
  1. Code the ignition switch lock cylinder, if necessary. Refer to Key and Lock Cylinder Coding .
  2. Insert the key and turn the lock cylinder to the ON/RUN position.
  3. Install the lock cylinder to the ignition switch. If you turned the key slightly while removing the lock cylinder, you may have to align the white colored ignition switch rotor (1) with the lock cylinder (2). You can rotate the ignition switch rotor (1) with your finger.
  4. Turn the key to the OFF position and remove the key.
  5. If necessary, install the radio. Refer to Radio Replacement in Entertainment.
  6. Install the I/P accessory trim plate. Refer to Instrument Panel Accessory Trim Plate Replacement .
  7. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  8. If a new lock cylinder was installed, perform the BCM theft deterrent relearn procedure. Refer to Body Control Module (BCM) Programming/RPO Configuration in Computer/Integrating Systems.