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.

Oil Filler Cap - Remove
Courtesy of GENERAL MOTORS COMPANY

Intake Manifold Cover Bolt (1) - Remove
Intake Manifold Cover (2) - Remove
Install the oil filler cap after removal of the intake manifold cover to prevent debris from falling into the engine.
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Evaporative Emission Canister Purge Tube (1) @ Evaporative Emission Pipe (2) - Disconnect - Plastic Collar Quick Connect Fitting Service
Evaporative Emission Pipe (2) @ Retainer (3) - Disengage
Raise and support the vehicle. Lifting and Jacking the Vehicle
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Rear Tire Front Air Deflector Bolt- Left Side and Right Side (1) - Remove [4x]
Rear Tire Front Air Deflector- Left Side and Right Side (2) - Remove [2x]
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Rear Wheelhouse Liner Bolt- Left Side (1) - Remove
Underbody Rear Air Deflector Nut- Left Side (2) - Remove [3x]
Underbody Rear Air Deflector Bolt- Left Side (3) - Remove [3x]
Underbody Rear Air Deflector Nut- Left Side (4) - Remove [2x]
Underbody Rear Air Deflector- Left Side (5) - Remove
Courtesy of GENERAL MOTORS COMPANY

Rear Wheelhouse Liner Bolt- Right Side (1) - Remove
Underbody Rear Air Deflector Bolt- Right Side (2) - Remove [3x]
Underbody Rear Air Deflector Nut- Right Side (3) - Remove [3x]
Underbody Rear Air Deflector Nut- Right Side (4) - Remove [2x]
Underbody Rear Air Deflector- Right Side (5) - Remove
Courtesy of GENERAL MOTORS COMPANY

Underbody Front Air Deflector Bolt- Right Side (1) - Remove [6x]
Underbody Rear Air Deflector Nut- Right Side (2) - Remove [5x]
Transmission Fluid Cooler Pipe Bracket Bolt- Right Side (3) - Remove [2x]
Underbody Rear Air Deflector- Right Side (5) - Remove
Courtesy of GENERAL MOTORS COMPANY

Underbody Front Air Deflector Bolt- Left Side (1) - Remove [6x]
Underbody Rear Air Deflector Nut- Left Side (2) - Remove [5x]
Transmission Fluid Cooler Pipe Bracket Bolt- Left Side (3) - Remove [2x]
Underbody Rear Air Deflector- Left Side (5) - Remove
Courtesy of GENERAL MOTORS COMPANY

Floor Panel Number 4 Cross Bar Reinforcement Bolt (1) - Remove [6x]
Floor Panel Reinforcement (2) - Remove
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Catalytic Converter Nut (1) - Remove [2x]
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Exhaust Pipe Clamp (1) - Loosen [2x]
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Exhaust Muffler (1) @ Exhaust Intermediate Pipe Insulator-Left Side (2) - Separate [2x]
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Exhaust Muffler (1) @ Exhaust Intermediate Pipe Insulator-Right Side (2) - Separate [2x]
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Electrical Connector (1) - Disconnect
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Electrical Connector (1) - Disconnect
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NOTE:
The rear bumper fascia is removed for illustration purposes only.

Exhaust Muffler Hanger Bracket Nut (1) - Remove [4x]
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With the aid of an assistant, remove the exhaust muffler (1).
Catalytic Converter Gasket (2) - Remove and DISCARD
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Exhaust Heat Shield Nut- Right Side (1) - Remove [3x]
Transmission Fluid Cooler Pipe Clamp Bolt- Right Side (2) - Remove
Exhaust Heat Shield Bolt- Right Side (3) - Remove
Exhaust Front Underbody Heat Shield- Right Side (4) - Remove
Courtesy of GENERAL MOTORS COMPANY

Evaporative Emission Pipe (1) @ Retainer (2) - Disengage
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Evaporative Emission Pipe (1) @ Retainer (2) - Disengage [6x]
Courtesy of GENERAL MOTORS COMPANY

Fuel Tank Vent Valve Hose (1) @ Evaporative Emission Pipe (2) - Disconnect - Plastic Collar Quick Connect Fitting Service
Evaporative Emission Pipe (2) @ Retainer (3) - Disengage [2x]
Evaporative Emission Pipe (2) - Remove