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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 809 (Engine Exhaust System) >> Repair Instructions >> Catalytic Converter Replacement (4.8L and 5.3L 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
    G02119430Courtesy of GENERAL MOTORS CORP.
  4. Raise the transmission off of the transmission support.
  5. Remove the transmission support crossmember bolts and nuts.
    6. Fig 2: Removing Transmission Support Crossmember Bolts And Nuts
    G02119431Courtesy of GENERAL MOTORS CORP.
  6. Remove the transmission support crossmember.
  7. Remove the clip from around the engine harness and the oxygen sensor pigtail.
    8. Fig 3: Removing Clip From Around Engine Harness And Oxygen Sensor Pigtail
    G02119432Courtesy of GENERAL MOTORS CORP.
  8. Disconnect the connector position assurance (CPA) retainers.
  9. Disconnect the oxygen sensor electrical connectors.
  10. Unclip the oxygen sensor electrical connectors from the following:
    • Hose clip
    • Transmission crossmember
  11. Disconnect the CPA retainers.
  12. Disconnect the oxygen sensor electrical connectors (1, 2).
    13. Fig 4: Removing Oxygen Sensor Electrical Connectors
    G02119433Courtesy of GENERAL MOTORS CORP.
  13. Remove the left exhaust manifold pipe nuts.
    14. Fig 5: Removing Left Exhaust Manifold Pipe Nuts
    G02119434Courtesy of GENERAL MOTORS CORP.
  14. Remove the right exhaust manifold pipe nuts.
    15. Fig 6: Removing Right Exhaust Manifold Pipe Nuts
    G02119435Courtesy of GENERAL MOTORS CORP.
  15. Remove the exhaust muffler nuts.
    16. Fig 7: Removing Exhaust Muffler Nuts
    G02119436Courtesy of GENERAL MOTORS CORP.
  16. Remove the catalytic converter.
  17. Remove the oxygen sensors if the catalytic converter is to be replaced.
    18. Fig 8: Removing Catalytic Converter Oxygen Sensors
    G02119437Courtesy of GENERAL MOTORS CORP.
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