Transmission Control Module Replacement

Preliminary Procedures

1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection (RPO LS4) or Battery Negative Cable Disconnection and Connection (RPOs LZE/LZ4/LZ8) .
2. Remove the air cleaner housing. Refer to Air Cleaner Assembly Replacement for the 3.5L engine, Air Cleaner Assembly Replacement for the 3.9L engine, Air Cleaner Assembly Replacement for the 5.3L engine.
3. Position the engine control module out of the way. Refer to Engine Control Module Replacement for the 3.5L engine, Engine Control Module Replacement for the 3.9L engine, Engine Control Module Replacement for the 5.3L engine.

• It is recommended that the transmission adaptive pressure (TAP) information be reset.
• Resetting the TAP values using a scan tool will erase all learned values in all cells. As a result, the ECM, PCM or TCM will need to relearn TAP values. Transmission performance may be affected as new TAP values are learned. Reset the TAP values. Refer to Transmission Adaptive Functions .
• Refer to Control Module References for programming and setup information.