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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 374 (Engine Exhaust System) >> Repair Instructions >> Exhaust Seal Replacement (L96) >> Removal Procedure

Removal Procedure

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:

Refer to Protective Goggles and Glove Warning .

WARNING:

Refer to Exhaust Service Warning .

  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Remove the oil pan skid plate, if equipped. Refer to Oil Pan Skid Plate Replacement (1500 with RPO NZZ) , Oil Pan Skid Plate Replacement (2500/3500 with RPO NZZ) .
    3. Fig 1: Catalytic Converter Assembly HO2S's
    GM1704008Courtesy of GENERAL MOTORS CORP.
  3. Disconnect the heated oxygen (HO2S) sensors harness connectors. Refer to Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 ,, Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 ,, Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 , and Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 .
    4. Fig 2: Catalytic Converter To Exhaust Manifold Nuts And Exhaust Seals
    GM1708626Courtesy of GENERAL MOTORS CORP.
  4. Remove the catalytic converter pipe to the exhaust manifold nuts (1).
  5. Remove the exhaust seals (2 and 3) and discard.
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