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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 47 (Exhaust System) >> Repair Instructions >> Exhaust Intermediate Underbody Heat Shield Replacement (LSY) >> Removal Procedure

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.

  1. Raise and support the vehicle. Lifting and Jacking the Vehicle
  2. GM5395705Courtesy of GENERAL MOTORS COMPANY

    Rear Tire Front Air Deflector Bolt (1) - Remove [2x]

  3. Rear Tire Front Air Deflector-Left Side (2) - Remove
  4. GM5400553Courtesy of GENERAL MOTORS COMPANY

    Rear Wheelhouse Liner Screw (1) - Remove

  5. Underbody Rear Air Deflector Plastic Nut (2) - Remove [3x]
  6. Underbody Rear Air Deflector Bolt (3) - Remove [3x]
  7. Underbody Rear Air Deflector Nut (4) - Remove [2x]
  8. Underbody Rear Air Deflector-Left Side (5) - Remove
  9. GM5395705Courtesy of GENERAL MOTORS COMPANY

    Rear Tire Front Air Deflector Bolt (1) - Remove [2x]

  10. Rear Tire Front Air Deflector-Right Side (2) - Remove
  11. GM5400642Courtesy of GENERAL MOTORS COMPANY

    Rear Wheelhouse Liner Screw (1) - Remove

  12. Underbody Rear Air Deflector Bolt (2) - Remove [3x]
  13. Underbody Rear Air Deflector Plastic Nut (3) - Remove [3x]
  14. Underbody Rear Air Deflector Nut (4) - Remove [2x]
  15. Underbody Rear Air Deflector-Right Side (5) - Remove
  16. GM5400756Courtesy of GENERAL MOTORS COMPANY

    Floor Panel Number 4 Cross Bar Reinforcement Bolt (1) - Remove [6x]

  17. Floor Panel Reinforcement (2) - Remove
  18. GM5309188Courtesy of GENERAL MOTORS COMPANY

    Catalytic Converter Nut (1) - Remove [2x]

  19. GM5309214Courtesy of GENERAL MOTORS COMPANY

    Separate the exhaust muffler (1) from the warm up three-way catalytic converter.

  20. Catalytic Converter Gasket (2) - Remove and DISCARD
  21. GM5441362Courtesy of GENERAL MOTORS COMPANY

    Exhaust Heat Shield Bolt (1) - Remove [6x]

  22. Exhaust Intermediate Underbody Heat Shield (2) - Remove