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Home >> Chevrolet >> 2011 >> Chevy Express G2500, Van Cargo Extended, 6.6 L >> Repair and Diagnosis >> Engine Mechanical >> Engine Exhaust System >> Repair Instructions >> Catalytic Converter Replacement (LGH) >> Installation Procedure

Installation Procedure

  1. If replacing the catalytic converter, apply water based lubricant to the catalytic converter hanger bracket and slide the exhaust pipe hanger bracket into the catalytic converter hanger.
  2. Fig 1: View Of Catalytic Converter Hanger-To-Transmission Bolts
    GM2369497Courtesy of GENERAL MOTORS CORP.
  3. Install a NEW catalytic converter to diesel particulate filter gasket.
  4. Position the catalytic converter to the diesel particulate filter, turbocharger exhaust pipe and the hanger bracket to transmission.
  5. CAUTION:

    Refer to Fastener Caution .

  6. Install the catalytic converter hanger to transmission bolts (1) and tighten to 58 N.m (43 lb ft).
  7. Fig 2: Identifying catalytic converter to particulate filter nuts
    GM1862863Courtesy of GENERAL MOTORS CORP.
  8. Install the catalytic converter to particulate filter nuts (3) until snug.
  9. Fig 3: View Of exhaust pipe clamp
    GM1862851Courtesy of GENERAL MOTORS CORP.
    NOTE:

    Ensure that the manifold pipe is square to the exhaust pipe adapter.

  10. Slide the exhaust pipe clamp (1) down and around the pipe connection.
  11. Tighten the exhaust pipe clamp and catalytic converter nuts.
    • Tighten the clamp to 15 N.m (11 lb ft).
    • Tighten the nuts to 34 N.m (25 lb ft).
  12. Fig 4: Identifying Exhaust Temperature Sensor 2 Position Connector
    GM2369496Courtesy of GENERAL MOTORS CORP.
  13. Connect the exhaust temperature sensor-position 2 connector (1), to the catalytic converter.
  14. Fig 5: Identifying Engine Harness Connector And Emission Reduction Fluid Injector Connector
    GM2369500Courtesy of GENERAL MOTORS CORP.
  15. Connect the emission reduction fluid injector connector (2) and the engine harness connector (1).
  16. Lower the vehicle.