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Installation 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.
    Fig 1: Catalytic Converter, Gasket & Fasteners
    GM2805059Courtesy of GENERAL MOTORS COMPANY
  1. Install Catalytic Converter (3)
  2. Install a NEW gasket.(2)
  3. CAUTION:

    Refer to Fastener Caution .

  4. Install Catalytic Converter Nut (1) @Cylinder Head and tighten 46 N.m (34 lb ft)
  5. If equipped, install the catalytic converter brace bracket. Catalytic Converter Brace Bracket Replacement (LGX) 
  6. Fig 2: Exhaust Muffler, Catalytic Converter & Mounting Components
    GM2788821Courtesy of GENERAL MOTORS COMPANY
  7. Install a NEW gasket.(2)
  8. Connect Exhaust Muffler (4) @Catalytic Converter (3)
  9. Install Catalytic Converter Nut (1) and tighten 50 N.m (37 lb ft)
  10. Connect Heated Oxygen Sensor. Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 (LGX)
  11. Connect Heated Oxygen Sensor.Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 (LGX)
  12. Install Intake Manifold Cover. Intake Manifold Cover Replacement (LGX)
  13. Start the engine and check for exhaust leaks.