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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1261 (Engine Exhaust System) >> Repair Instructions >> Exhaust Manifold Pipe Replacement (6.0L, and 8.1L Engines) >> Removal Procedure

Removal Procedure

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    Fig 1: View of Oil Pan Skid Plate & Bolts
    GM339429Courtesy of GENERAL MOTORS CORP.
  1. Raise and suitably support the vehicle. Refer to LIFTING & JACKING THE VEHICLE .
  2. Remove the oil pan skid plate bolts and plate, if necessary.
    3. Fig 2: Identifying Transmission Mount Nuts
    GM647997Courtesy of GENERAL MOTORS CORP.
  3. Support the transmission with a transmission jack.
  4. Remove the transmission mount to transmission support nuts.
  5. Raise the transmission off of the transmission support.
    6. Fig 3: View of Transmission Support Crossmember Bolts
    GM788013Courtesy of GENERAL MOTORS CORP.
  6. Remove the transmission support crossmember bolts.
  7. Remove the transmission support crossmember.
    8. Fig 4: View Of O2 Sensor, Connector, Harness And Retainers
    GM664781Courtesy of GENERAL MOTORS CORP.
  8. Remove the exhaust muffler. Refer to Muffler Replacement (4.8L and 5.3L Engines)  or Muffler Replacement (6.0L and 8.1L Engines) .
  9. Remove the clip around the engine harness and the oxygen sensor pigtail.
  10. Disconnect the connector position assurance (CPA) retainer.
  11. Disconnect the oxygen sensor electrical connector.
  12. If replacing the exhaust manifold pipe, remove the oxygen sensor.
    13. Fig 5: View of Exhaust Manifold Pipe Nuts
    GM664826Courtesy of GENERAL MOTORS CORP.
  13. Remove the exhaust manifold pipe nuts.
    14. Fig 6: View of Exhaust Manifold Pipe
    GM344263Courtesy of GENERAL MOTORS CORP.
  14. Remove the exhaust manifold pipe.
  15. Slide the exhaust manifold pipe hanger out of the exhaust pipe hanger bracket.
  16. Discard the exhaust manifold pipe seal.
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