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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 (LSY) >> 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 .

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

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

  4. Rear Wheelhouse Liner Bolt (1) - Install and tighten [2x] - Fastener Specifications
  5. GM5309214Courtesy of GENERAL MOTORS COMPANY

    Catalytic Converter Gasket (2) - Install NEW

  6. With the aid of an assistant, install the exhaust muffler (1).
  7. GM5309211Courtesy of GENERAL MOTORS COMPANY

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

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

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

  10. Exhaust Muffler (1) @ Exhaust Intermediate Pipe Insulator-Left Side (2) - Install
  11. GM5309188Courtesy of GENERAL MOTORS COMPANY

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

  12. GM5400756Courtesy of GENERAL MOTORS COMPANY

    Floor Panel Reinforcement (2) - Install

  13. Floor Panel Number 4 Cross Bar Reinforcement Bolt (1) - Install and tighten [6x] - Fastener Specifications
  14. GM5400642Courtesy of GENERAL MOTORS COMPANY

    Underbody Rear Air Deflector-Right Side (5) - Install

  15. Underbody Rear Air Deflector Plastic Nut (3) - Install and tighten [3x] - Fastener Specifications
  16. Underbody Rear Air Deflector Bolt (2) - Install and tighten [3x] - Fastener Specifications
  17. Underbody Rear Air Deflector Nut (4) - Install and tighten [2x] - Fastener Specifications
  18. Rear Wheelhouse Liner Screw (1) - Install and tighten - Fastener Specifications
  19. GM5395705Courtesy of GENERAL MOTORS COMPANY

    Rear Tire Front Air Deflector-Right Side (2) - Install

  20. Rear Tire Front Air Deflector Bolt (1) - Install and tighten [2x] - Fastener Specifications
  21. GM5400553Courtesy of GENERAL MOTORS COMPANY

    Underbody Rear Air Deflector-Left Side (5) - Install

  22. Underbody Rear Air Deflector Plastic Nut (2) - Install and tighten [3x] - Fastener Specifications
  23. Underbody Rear Air Deflector Bolt (3) - Install and tighten [3x] - Fastener Specifications
  24. Underbody Rear Air Deflector Nut (4) - Install and tighten [2x] - Fastener Specifications
  25. Rear Wheelhouse Liner Screw (1) - Install and tighten - Fastener Specifications
  26. GM5395705Courtesy of GENERAL MOTORS COMPANY

    Rear Tire Front Air Deflector-Left Side (2) - Install

  27. Rear Tire Front Air Deflector Bolt (1) - Install and tighten [2x] - Fastener Specifications
  28. Lower the vehicle.
  29. Inspect the exhaust system for leaks.
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