GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 1248378  Size: SH
  1. Remove the instrument panel lower cover.

  2. Object Number: 1252101  Size: SH
  3. Disconnect the electrical connector from the immobilizer control unit.

  4. Object Number: 1252102  Size: SH
  5. Remove the immobilizer control unit.

Installation Procedure


    Object Number: 1252101  Size: SH
  1. Install the immobilizer control unit.
  2. Connect the electrical connector to the immobilizer control unit.

  3. Object Number: 1248378  Size: SH

    Important: After replacing the immobilizer, the keys must be re-authorized using the key coding procedure. Refer to Programming Additional Keys .

  4. Install the instrument panel lower cover
  5. Refer to Control Module References for programming and setup information.