GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2004 🢒 Optra 🢒 Transmission/Transaxle 🢒 Automatic Transmission - Aisin (81-40LE) 🢒 Transmission Control Module Replacement

Removal Procedure

    Caution: Refer to Battery Disconnect Caution in the Preface section.


    Object Number: 1376107 Size: SH
  1. Disconnect the negative battery cable.
  2. Disconnect the transmission control module (TCM) electrical connector.

    3. Object Number: 1376108 Size: SH
  3. Remove the TCM retaining bolts.
  4. Remove the TCM.

Installation Procedure

    Important: After replacing the TCM, refer to Service Programming System (SPS) to ensure the module has the latest calibrations.


    Object Number: 1376108 Size: SH
  1. Connect the negative battery cable.

    2. Notice: Refer to Fastener Notice in the Preface section.

  2. Install the TCM and retaining bolts.

    3. Tighten
    Tighten the TCM retaining bolts to 5 N·m (44 lb in).


    Object Number: 1376107 Size: SH
  3. Connect the TCM electrical connector.
  4. Connect the negative battery cable.