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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 151 (Engine Exhaust System) >> Repair Instructions >> Exhaust Seal Replacement (1500 Series) >> Installation Procedure

Installation Procedure

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Catalytic Converter To Exhaust Manifold Nuts & Exhaust Seals
    GM1708626Courtesy of GENERAL MOTORS CORP.
  1. Install the NEW exhaust seal (2 or 3) as required.
  2. Raise the catalytic converter assembly into place using the adjustable jack.
  3. Install the catalytic converter assembly to the exhaust manifolds.
    4. NOTE: Refer to Fastener Notice .
  4. Install the catalytic converter to exhaust manifold nuts (1).

    Tighten:  Tighten the nuts to 50 N.m (37 lb ft).

  5. Remove the adjustable jack from the catalytic converter assembly.
  6. Install the HO2S. Refer to Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 (1500 Series) or Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 (2500 Series) .
    7. Fig 2: View Of Left Front HO2S Electrical Connector Clip & Engine Wiring Harness Electrical Connector
    GM1704004Courtesy of GENERAL MOTORS CORP.
  7. For vehicles equipped with a 4L60-E/4L70-E automatic transmission perform the following steps, for vehicles equipped with a 6L80-E automatic transmission proceed to step 10.
  8. Install the HO2S electrical connector clip (1) to the fuel line clip.
  9. Connect the engine wiring harness electrical connector (2) to the HO2S.
  10. Install the CPA retainer.
    11. Fig 3: View Of Engine Wiring Harness Electrical Connector Clip & Electrical Connector
    GM1704002Courtesy of GENERAL MOTORS CORP.
  11. Connect the engine wiring harness electrical connector (3) to the HO2S.
  12. Install the engine wiring harness electrical connector clip (1) to the fuel line clip.
  13. Install the CPA retainer (2).
    14. Fig 4: View Of Left Rear CPA Retainer & Engine Wiring Harness Electrical Connector
    GM1704005Courtesy of GENERAL MOTORS CORP.
  14. Connect the left rear HO2S electrical connector to the engine wiring harness electrical connector (3).
  15. Install the left rear CPA retainer (1).
    16. Fig 5: View Of Engine Wiring Harness Electrical Connectors, (CPA) Retainers & Engine Harness Clips
    GM1704006Courtesy of GENERAL MOTORS CORP.
  16. Install the right rear HO2S electrical connector clip to the engine harness clip (5).
  17. Connect the engine wiring harness electrical connector (3) to the right rear HO2S electrical connector.
  18. Install the right rear CPA retainer (4).
  19. Connect the right front HO2S electrical connector to the engine wiring harness electrical connector (1).
  20. Install the right front CPA retainer (2).
    21. Fig 6: View Of Oil Pan Skid Plate & Bolts
    GM1698082Courtesy of GENERAL MOTORS CORP.
  21. Position the oil pan skid plate and install the oil pan skid plate bolts, if equipped.

    Tighten:  Tighten the bolts to 28 N.m (21 lb ft).

  22. Lower the vehicle.
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