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Home >> Cadillac >> 2007 >> CTS V >> Repair and Diagnosis >> Engine Mechanical >> Engine Exhaust System >> Repair Instructions >> Exhaust System Replacement (LP1) >> Installation Procedure

Installation Procedure

  1. Install the HO2S to the exhaust system. Refer to Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 and Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 .
    2. Fig 1: View Of Exhaust System Components
    GM786659Courtesy of GENERAL MOTORS CORP.
  2. Install the muffler rear hangers (2) to the muffler(s).
    3. Fig 2: View Of Exhaust System
    GM772373Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Exhaust System Inspection Notice .
    NOTE: Refer to Flex Decoupler Notice .
  3. With the aid of an assistant, raise the exhaust system into position.
  4. Install the exhaust system (muffler) nuts.
    5. Fig 3: View Of Muffler To Muffler Rear Hangers
    GM1559372Courtesy of GENERAL MOTORS CORP.
  5. Install the muffler to the muffler rear hangers.
    6. Fig 4: View Of Muffler Front Hanger & Frame Hanger Rod
    GM1559373Courtesy of GENERAL MOTORS CORP.
  6. Install the muffler rear hanger to the hanger rod.
    7. NOTE: Refer to Fastener Notice .
    Fig 5: Identifying Exhaust Pipe Nuts
    GM1224063Courtesy of GENERAL MOTORS CORP.
  7. Install the exhaust pipe nuts.

    Tighten:  Tighten the nuts to 22 N.m (16 lb ft).

    8. Fig 6: Identifying Floor Panel Tunnel Brace
    GM772383Courtesy of GENERAL MOTORS CORP.
  8. Install the floor panel tunnel brace to the floor panel.
  9. Install the floor panel tunnel brace bolts.

    Tighten:  Tighten the floor panel tunnel brace bolts to 25 N.m (18 lb ft).

    10. Fig 7: View Of HO2S Electrical Connector, Sensor 2 (Bank 1 Shown, Bank 2 Similar)
    GM1201222Courtesy of GENERAL MOTORS CORP.
  10. Connect the left and right bank 2 HO2S electrical connectors (bank 1 shown, bank 2 similar).
  11. Install the HO2S wiring harnesses to the transmission case.
  12. Lower the vehicle.
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