Transmission Control Module Replacement for Chevrolet Optra 2008

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




1. Disconnect the negative battery cable.
2. Disconnect the transmission control module (TCM) electrical connector.



3. Remove the TCM retaining bolts.
4. Remove the TCM.

Important: After replacing the TCM, refer to Transmission Control Module Programming and Setup to ensure the module has the latest calibrations.




1. Connect the negative battery cable.

Notice: Refer to Fastener Notice in the Preface section.

2. Install the TCM and retaining bolts.

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




3. Connect the TCM electrical connector.
4. Connect the negative battery cable.
5. Refer to Control Module References for programming and setup information.