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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 788 (Engine Exhaust System) >> Repair Instructions >> Exhaust Manifold Pipe Replacement (6.0L and 8.1L Engines) >> Installation Procedure

Installation Procedure

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  1. Install a NEW exhaust manifold pipe seal to the exhaust manifold pipe.
  2. Install the exhaust manifold pipe.
    3. Fig 1: Installing Exhaust Manifold Pipe
    G02119419Courtesy of GENERAL MOTORS CORP.
  3. Using the transmission jack, raise the transmission.
  4. Install the exhaust manifold pipe nuts.
    NOTE: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

    Tighten 

    Tighten the nuts to 50 N.m (39 lb ft).

    5. Fig 2: Installing Exhaust Manifold Pipe Nuts
    G02119420Courtesy of GENERAL MOTORS CORP.
  5. If the old oxygen sensor is being reused, apply anti-seize compound GM P/N 12377953 or equivalent to the threads.
  6. Install the oxygen sensor.

    Tighten 

    Tighten the sensor to 42 N.m (31 lb ft).

  7. Connect the oxygen sensor electrical connector.
  8. Connect the CPA retainer.
  9. Install the clip around the engine harness and the oxygen sensor pigtail.
    10. Fig 3: Installing Clip Around Engine Harness And Oxygen Sensor Pigtail
    G02119421Courtesy of GENERAL MOTORS CORP.
  10. Install the exhaust muffler. Refer to MUFFLER REPLACEMENT (4.8L AND 5.3L ENGINES)  or MUFFLER REPLACEMENT (6.0L AND 8.1L ENGINES)  .
  11. Install the transmission support crossmember.
    12. Fig 4: Installing Transmission Support Crossmember
    G02119422Courtesy of GENERAL MOTORS CORP.
  12. Install the transmission support crossmember bolts.

    Tighten 

    Tighten the bolts to 95 N.m (70 lb ft).

  13. Lower the transmission onto the transmission support.
    14. Fig 5: Installing Transmission Onto Transmission Support
    G02119423Courtesy of GENERAL MOTORS CORP.
  14. Install the transmission mount to transmission support nuts.

    Tighten 

    Tighten the nuts to 40 N.m (30 lb ft).

  15. Remove the transmission jack.
  16. Lower the vehicle.
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