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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 261 (Engine Exhaust System) >> Repair Instructions >> Exhaust Seal Replacement (2500 ) >> Installation Procedure

Installation Procedure

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    Fig 1: View Of Exhaust Seals & Exhaust Manifold Nuts
    GM1708627Courtesy of GENERAL MOTORS CORP.
  1. Install the NEW exhaust seal(s) (1) as required.
  2. Raise the catalytic converter assemblies into place using the adjustable jacks.
  3. Install the catalytic converter assemblies to the exhaust manifolds.
    4. NOTE: Refer to Fastener Notice .
  4. Install the catalytic converter to exhaust manifold nuts (2).

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

    5. Fig 2: View Of Exhaust Pipe Hanger Bracket & Bolts
    GM1708691Courtesy of GENERAL MOTORS CORP.
  5. Position the exhaust pipe hanger bracket to the transmission.
  6. Install the exhaust pipe hanger bracket bolts.

    Tighten:  Tighten the bolts to 25 N.m (18 lb ft).

  7. Remove the supports from the catalytic converter assemblies.
    8. Fig 3: View Of Left Front CPA Retainer & Engine Wiring Harness Electrical Connector
    GM1704010Courtesy of GENERAL MOTORS CORP.
  8. Connect the left front HO2S electrical connector (2) to the engine wiring harness electrical connector (3).
  9. Install the left front CPA retainer (2).
    10. Fig 4: View Of Left Rear CPA Retainer & Engine Wiring Harness Electrical Connector
    GM1704005Courtesy of GENERAL MOTORS CORP.
  10. Connect the left rear HO2S electrical connector to the engine wiring harness electrical connector (3).
  11. Install the left rear CPA retainer (1).
    12. Fig 5: View Of Engine Wiring Harness Electrical Connectors, (CPA) Retainers & Engine Harness Clip
    GM1704011Courtesy of GENERAL MOTORS CORP.
  12. Install the right rear HO2S electrical connector clip to the engine harness clip (4).
  13. Connect the engine wiring harness electrical connector (2) to the right rear HO2S electrical connector.
  14. Install the right rear CPA retainer (3).
  15. Connect the right front HO2S electrical connector to the engine wiring harness electrical connector (1).
  16. Install the right front CPA retainer (5).
    17. Fig 6: View Of Oil Pan Skid Plate & Bolts
    GM1698083Courtesy of GENERAL MOTORS CORP.
  17. Position the oil pan skid plate and tighten until snug the 2 rear oil pan skid plate bolts, install the 2 front oil pan skid plate bolts, if equipped.

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

  18. Lower the vehicle.
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