Transmission Control Module Replacement

Fig 1: Transmission Control Module

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
CAUTION: Refer to Fastener Caution . Preliminary Procedures Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection (L26) or Battery Negative Cable Disconnection and Connection (LS4) . Remove the air cleaner housing. Refer to Air Cleaner Assembly Replacement . Position the powertrain control module (PCM) out of the way. Refer to Powertrain Control Module Replacement .
1	Transmission Control Module (TCM) Tip: Disconnect the TCM electrical connector. New TCM must be programmed. Refer to Control Module References for programming and setup information.. 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 engine control module (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

CAUTION: Refer to Fastener Caution .

Preliminary Procedures

Transmission Control Module (TCM)
Tip:

Disconnect the TCM electrical connector.
New TCM must be programmed. Refer to Control Module References for programming and setup information..
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 engine control module (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 .