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.

WARNING:

In order to avoid being burned, do not service the exhaust system while it is still hot. Service the system when it is cool.

WARNING:

Avoid contact with HOT components. Wear safety glasses and protective gloves to avoid personal injury.

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
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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
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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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Catalytic Converter Brace Bracket Nut (1) - Remove [5x]
Catalytic Converter Brace (2) - Remove
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Disconnect the heated oxygen sensor electrical connector.

CAUTION:

Refer to Heated Oxygen and Oxygen Sensor Caution .

NOTE:

The heated oxygen sensor MAY be difficult to remove when the engine temperature is less than 48°C (120°F).

Remove the heated oxygen sensor (1) using a suitable tool.
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Disconnect the heated oxygen sensor electrical connector.
Remove the heated oxygen sensor (1) using a suitable tool.
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Catalytic Converter Nut (1) - Remove [4x]
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Warm Up Three-Way Catalytic Converter (1) - Remove
Turbocharger Exhaust Pipe Gasket (2) - Remove and DISCARD