Removal Procedure

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
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Disconnect the transmission control module electrical connector (1).
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Disengage the retaining tab then remove the transmission control module (1).
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Transmission Control Module Bracket Bolt (1) - Remove
Rotate the transmission control module bracket (2) forward a quarter of turn and remove the transmission control module bracket.