Removal Procedure

Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection (9C1/5W4) , or Battery Negative Cable Disconnection and Connection (KL9)
Remove the front tire and wheel assembly. Tire and Wheel Removal and Installation (Steel Wheel) , or Tire and Wheel Removal and Installation (Aluminum Wheel)
Courtesy of GENERAL MOTORS COMPANY

{If equipped} Front Tire Front Air Deflector Bolt (1) - Remove
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NOTE:
Quantity of fasteners may vary based on option content.

Front Wheelhouse Liner Bolt (1) - Remove [3x]
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NOTE:
Quantity of fasteners may vary based on option content.

Front Wheelhouse Liner Bolt (1) - Remove [3x]
Front Wheelhouse Liner Retainer (2) - Remove
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Front Wheelhouse Liner Bolt (1) - Remove [3x]
Reposition the front wheelhouse liner rearward.
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Disconnect the electrical connectors. (1)
Engine Wiring Harness Retainer (2) - Disengage [2x]
Engine Wiring Harness Channel Retainer (3) - Remove [2x]
Engine Wiring Harness (4) - Reposition
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Engine Control Module Bolt (1) - Remove [4x]
Engine Control Module (2) - Remove
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Engine Control Module Bracket Bolt (1) - Remove [3x]
Engine Control Module Bracket (2) - Reposition
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Engine Wiring Harness Retainer (1) - Disengage [2x]
Disconnect the electrical connector. (2)
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Use a suitable tool to release the locking tab and remove the transmission control module (1) by sliding it out from the engine control module bracket (2).