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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 228 (Exhaust System) >> Repair Instructions >> Catalytic Converter Replacement (LTG) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2017 Cadillac ATS. 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. Remove Turbocharger Heat Shield - Turbocharger Heat Shield Replacement
  2. Remove Exhaust Muffler - Exhaust Muffler Replacement (LTG) 
  3. Fig 1: Heated Oxygen Sensor Electrical Connector
    GM4406263Courtesy of GENERAL MOTORS COMPANY
  4. Remove Heated Oxygen Sensor Electrical Connector (1)
  5. Fig 2: Catalytic Converter Brace Bracket-Lower And Bolts
    GM4620829Courtesy of GENERAL MOTORS COMPANY
  6. Remove Catalytic Converter Brace Bracket Bolt (1)
  7. Remove Catalytic Converter Brace Bracket Bolt (2)
  8. Remove Catalytic Converter Brace Bracket-Lower (3)
  9. Lower the vehicle. Lifting and Jacking the Vehicle (ATS)Lifting and Jacking the Vehicle (ATS-V)
  10. Fig 3: Catalytic Converter Seal
    GM4406530Courtesy of GENERAL MOTORS COMPANY
  11. Remove Catalytic Converter Nut (1)
  12. Raise and support the vehicle. Lifting and Jacking the Vehicle (ATS)Lifting and Jacking the Vehicle (ATS-V)
  13. Fig 4: Catalytic Converter Brace Bracket
    GM4406306Courtesy of GENERAL MOTORS COMPANY
  14. Remove Catalytic Converter Brace Bracket Bolt (1)
  15. Remove Catalytic Converter Brace Bracket-Upper (1)
  16. Fig 5: Catalytic Converter Seal
    GM4406530Courtesy of GENERAL MOTORS COMPANY
  17. Remove Warm Up Three-Way Catalytic Converter (2)
  18. Remove Catalytic Converter Seal (3) and DISCARD