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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) >> Removal Procedure

Removal Procedure

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  1. Raise and suitably support the vehicle. Refer to LIFTING AND JACKING THE VEHICLE in General Information.
  2. Support the transmission with a suitable transmission jack.
  3. Remove the transmission mount to transmission support nuts.
    4. Fig 1: Removing Transmission Mount To Transmission Support Nuts
    G02119414Courtesy of GENERAL MOTORS CORP.
  4. Raise the transmission off of the transmission support.
  5. Remove the transmission support crossmember bolts.
    6. Fig 2: Removing Transmission Support Crossmember
    G02119415Courtesy of GENERAL MOTORS CORP.
  6. Remove the transmission support crossmember.
  7. Remove the exhaust muffler. Refer to MUFFLER REPLACEMENT (4.8L AND 5.3L ENGINES)  or MUFFLER REPLACEMENT (6.0L AND 8.1L ENGINES)  .
  8. Remove the clip around the engine harness and the oxygen sensor pigtail.
    9. Fig 3: Removing Clip Around Engine Harness And Oxygen Sensor Pigtail
    G02119416Courtesy of GENERAL MOTORS CORP.
  9. Disconnect the connector position assurance (CPA) retainer.
  10. Disconnect the oxygen sensor electrical connector.
  11. Remove the oxygen sensor.
  12. Remove the exhaust manifold pipe nuts.
    13. Fig 4: Removing Exhaust Manifold Pipe Nuts
    G02119417Courtesy of GENERAL MOTORS CORP.
  13. Using the transmission jack, lower the transmission slightly.
  14. Remove the exhaust manifold pipe.
    15. Fig 5: Removing Exhaust Manifold Pipe
    G02119418Courtesy of GENERAL MOTORS CORP.
  15. Discard the exhaust manifold pipe seal.
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