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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 603 (Engine Exhaust System) >> Repair Instructions >> Catalytic Converter Replacement (4.3L) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, and 2002 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
  1. Raise the vehicle.
  2. Disconnect the heated oxygen sensor (HO2S) electrical connections from catalytic converter pipe.
  3. Remove the transmission support. Refer to TRANSMISSION SUPPORT .
    Fig 1: Disconnecting Heated Oxygen Sensor Electrical Connections
    G01699393Courtesy of GENERAL MOTORS CORP.
    WARNING: In order to avoid being burned, do not service the exhaust system while it is still hot. Service the system when it is cool.
    WARNING: Always wear protective goggles and gloves when removing exhaust parts as falling rust and sharp edges from worn exhaust components could result in serious personal injury.
  4. Remove the nuts and the seals retaining the catalytic converter pipe to the exhaust manifolds.
    Fig 2: Removing Nuts & Seals Retaining Catalytic Converter Pipe
    G01699394Courtesy of GENERAL MOTORS CORP.
  5. Remove the flange nuts from the catalytic pipe to the muffler.
    Fig 3: Removing Flange Nuts From Catalytic Pipe
    G01699395Courtesy of GENERAL MOTORS CORP.
  6. Remove the catalytic converter from the vehicle.
  7. Remove the oxygen sensors as necessary. Refer to OXYGEN SENSOR .
    Fig 4: Identifying Exhaust Hanger
    G01699396Courtesy of GENERAL MOTORS CORP.
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