5L40-E/5L50-E - Automatic Transmission

Transmission Control Module Replacement

Removal Procedure

1. Remove the right side hinge pillar trim from the vehicle. Refer to Body Hinge Pillar Trim Panel Replacement (Service and Repair) .
2. Remove the knee bolster assembly. Refer to Knee Bolster Replacement (Service and Repair) .




3. Unlock the transmission control module electrical connector by pulling the retainer (2) away from the electrical connector (1).

Important: Twisting or tilting of the transmission control module electrical connector while disconnecting may result in bent or misaligned electrical terminal pins.






4. Carefully disconnect the electrical connector (1) from the transmission control module.
5. Disconnect the electrical connectors (1) from right hand side junction box and position loom towards the cowl




6. Remove the transmission control module from the mounting bracket by pulling back on the retaining tabs (1) to release the control module .



Installation Procedure





1. Align the transmission control module with the locating pins (2) on the module mounting bracket.
2. Install the transmission control module by seating it fully into the bracket until all of the retaining tabs (1) have engaged the edge of the module edge.




3. Install connectors (1) into the right hand side junction box





Important: Twisting or tilting of the transmission control module electrical connector while connecting may result in bent or misaligned electrical terminal pins.


4. Carefully connect the transmission control module electrical connector (1) to the transmission control module.
5. Lock the transmission control module electrical connector securely to the transmission control module by pushing the retainer (2) toward the electrical connector (1) until fully seated.
6. Install the right side hinge pillar trim on the vehicle. Refer to Body Hinge Pillar Trim Panel Replacement (Service and Repair) .
7. Install the knee bolster assembly. Refer to Knee Bolster Replacement (Service and Repair) .
8. If re-programming is required. Refer to Control Module References (Programming and Relearning) .

Important: It is recommended that 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 or TCM will need to relearn TAP values. Transmission performance may be affected as new TAP values are learned.


9. Reset the TAP values. Refer to Transmission Adaptive Functions (Transmission Adaptive Functions) .