Removal Procedure

Raise and support the vehicle. Lifting and Jacking the Vehicle (Standard Service) , or Lifting and Jacking the Vehicle (Mobile Service)
Courtesy of GENERAL MOTORS COMPANY

Underbody Rear Air Rear Deflector Bolt (1) - Remove [14x]
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Underbody Rear Air Rear Deflector Bolt (1) - Remove [4x]
Underbody Rear Air Deflector Retainer (2) - Remove [2x]
Courtesy of GENERAL MOTORS COMPANY

NOTE:
The proper position of the underbody rear air rear deflector - rear (1) is above the left and right side rear wheelhouse liners.

Underbody Rear Air Rear Deflector - Rear (1) - Remove
Courtesy of GENERAL MOTORS COMPANY

Disconnect the electrical connector.
Release the retaining tabs.
UHF Low Energy Remote Control Access Sensor Transceiver (1) - Remove