Removal Procedure

WARNING: This page is about a different car, the 2017 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection (Without KL9)Battery Negative Cable Disconnection and Connection (With KL9) .
Drain the transmission. Refer to Transmission Fluid Drain and Fill

Fig 1: Oil Cooler Hose Retainer And TCM Electrical Connector

Courtesy of GENERAL MOTORS COMPANY

Remove the oil cooler hose from the retainer (1) on the control valve body cover.
Disconnect the control valve body transmission control module (TCM) electrical connector (2), then the wiring harness from the cover.

Fig 2: Control Valve Body Cover Components

Courtesy of GENERAL MOTORS COMPANY

Remove the control valve body cover bolts (1).
Remove the control valve body cover (2).
Remove the control valve body cover gasket (3).

CAUTION:

Support the control solenoid valve assembly around the connector when removing the seal. Excessive pulling force can damage the internal electrical connections.

Remove the control valve body cover wiring connector hole seal (4).
Remove all traces of the old gasket material. Clean the transmission case and control valve body cover gasket surfaces.