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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 47 (Exhaust System) >> Repair Instructions >> Exhaust Rear Underbody Heat Shield Replacement (L3B) >> Installation Procedure

Installation Procedure

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  1. GM5394185Courtesy of GENERAL MOTORS COMPANY

    Exhaust Rear Underbody Heat Shield (2) - Install

  2. CAUTION:

    Refer to Fastener Caution .

  3. Exhaust Heat Shield Retainer (1) - Install and tighten - Fastener Specifications 
  4. GM5394175Courtesy of GENERAL MOTORS COMPANY

    Rear Bumper Fascia Bolt (2) - Install and tighten [7x] - Fastener Specifications

  5. Rear Wheelhouse Liner Bolt (1) - Install and tighten [2x] - Fastener Specifications
  6. GM5394598Courtesy of GENERAL MOTORS COMPANY

    Catalytic Converter Gasket (2) - Install NEW

  7. Exhaust Muffler (1) - Install
  8. GM5309211Courtesy of GENERAL MOTORS COMPANY

    Exhaust Muffler (1) @ Exhaust Rear Muffler Insulator-Right Side (3) - Install

  9. Exhaust Muffler (1) @ Exhaust Intermediate Pipe Insulator-Right Side (2) - Install
  10. GM5309202Courtesy of GENERAL MOTORS COMPANY

    Exhaust Muffler (1) @ Exhaust Rear Muffler Insulator-Left Side (3) - Install

  11. Exhaust Muffler (1) @ Exhaust Intermediate Pipe Insulator-Left Side (2) - Install
  12. GM5394596Courtesy of GENERAL MOTORS COMPANY

    Electrical Connector (1) @ Exhaust Control Valve Actuator - Connect [2x]

  13. GM5309188Courtesy of GENERAL MOTORS COMPANY

    Catalytic Converter Nut (1) - Install and tighten [2x] - Fastener Specifications 

  14. GM5400756Courtesy of GENERAL MOTORS COMPANY

    Floor Panel Reinforcement (2) - Install

  15. Floor Panel Number 4 Cross Bar Reinforcement Bolt (1) - Install and tighten [6x] - Fastener Specifications
  16. Lower the vehicle.
  17. Inspect the exhaust system for leaks.