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 negative battery cable. Battery Negative Cable Disconnection and Connection
Drain the cooling system. Cooling System Draining and Filling (LSY GE 47716) , or Cooling System Draining and Filling (LSY Static Fill) , or Cooling System Draining and Filling (LSY with V03 Static Fill) , or Cooling System Draining and Filling (L3B Static Fill) , or Cooling System Draining and Filling (L3B GE 47716) , or Cooling System Draining and Filling (LSY with V03 GE 47716) , or Cooling System Draining and Filling (LF4 Static Fill) , or Cooling System Draining and Filling (LF4 GE 47716)
Oil Filler Cap - Remove
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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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CAUTION:
The Positive Crankcase Ventilation (PCV) line is tamper resistant and must always be replaced once it is removed. The fittings connected to the PCV line must also be replaced if they are damaged when the PCV line is removed. To reduce the risk of damage to the fittings, use a suitable cutting tool and carefully cut the connections away.

Using a suitable cutting tool, carefully cut the 2 positive crankcase ventilation tube connectors (1).
Positive Crankcase Ventilation Fresh Air Tube (2) - Remove and DISCARD
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Turbocharger Wastegate Actuator Vacuum Tank Solenoid Valve Tube (1) - Disconnect and reposition - Plastic Collar Quick Connect Fitting Service
Air Cleaner Outlet Duct Clamp (2) - Loosen
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Charge Air Bypass Valve Hose Clamp (1) - Loosen
Charge Air Bypass Valve Hose (2) - Reposition
Retainer Spring (3) - Disengage
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Auxiliary Air Cleaner Outlet Duct (1) - Remove
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Charge Air Bypass Valve Hose Clamp (1) - Loosen [2x]
Charge Air Bypass Valve Hose (2) - Remove
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Retaining Clip (1) - Remove
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Turbocharger Coolant Feed and Return Pipe Bolt (1) - Remove
Turbocharger Coolant Feed and Return Pipe Gasket (2) - Remove and DISCARD [2x]
Turbocharger Coolant Return Pipe (3) - Remove
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Turbocharger Heat Shield Bolt (1) - Remove [2x]
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).

Using a suitable tool, remove the heated oxygen sensor (1).
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Disconnect the heated oxygen sensor electrical connector.
Using a suitable tool, remove the heated oxygen sensor (1).
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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
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Turbocharger Heat Shield Bolt (1) - Remove
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Turbocharger Heat Shield (1) - Remove
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Turbocharger Wastegate Actuator Vacuum Tank Solenoid Valve Tube (1) @ Turbocharger Wastegate Actuator - Disconnect - Plastic Collar Quick Connect Fitting Service
Turbocharger Wastegate Actuator Arm Retainer (2) - Remove
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Turbocharger Wastegate Actuator Bolt (1) - Remove
Turbocharger Wastegate Actuator (2) - Remove