Transmission Control Module Replacement

Fig 1: Transmission Control Module

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
Fastener Tightening Specifications: Refer to Fastener Tightening Specifications . Preliminary Procedures 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/LZ9) . 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. 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.
1	Module, Transmission Control (TCM). Refer to Control Module References for programming and setup information. Tip: Disconnect the TCM electrical connector. 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 .

Callout

Component Name

Fastener Tightening Specifications: Refer to Fastener Tightening Specifications .

Preliminary Procedures

Module, Transmission Control (TCM).
Refer to Control Module References for programming and setup information.
Tip:

Disconnect the TCM electrical connector.
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 .