Removal Procedure

CAUTION: Refer to Protective Goggles and Gloves Caution in Cautions and Notices.

NOTE: Refer to General Vehicle Lifting and Jacking Notice in Cautions and Notices.

NOTE: Refer to OEM Standard Notice in Cautions and Notices.

Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
Remove the transmission support. Refer to Transmission Support Replacement (RWD) or Transmission Support Replacement (4WD, ZR2) in Frame and Underbody.

Fig 1: View Of Pre-Converter Heated Oxygen Sensor Electrical Connection

GM543864

Courtesy of GENERAL MOTORS CORP.

Disconnect the LH pre-converter heated oxygen sensor (HO2S) electrical connection.

Fig 2: View Of Right Pre-Converter Heated Oxygen Sensor Electrical Connection

GM543854

Courtesy of GENERAL MOTORS CORP.

Disconnect the RH pre-converter heated oxygen sensor (HO2S) electrical connection.

Fig 3: View Of Post-Converter Heated Oxygen Sensor Electrical Connection

GM543858

Courtesy of GENERAL MOTORS CORP.

Disconnect the post-converter heated oxygen sensor (HO2S) electrical connection.

Fig 4: View Of Muffler To Catalytic Converter

GM535780

Courtesy of GENERAL MOTORS CORP.

Remove the muffler to the catalytic converter flange nuts.
Remove the muffler from the catalytic converter.

Fig 5: View Of Catalytic Converter To Exhaust Manifold

GM42940

Courtesy of GENERAL MOTORS CORP.

Remove the catalytic converter to exhaust manifold flange nuts.

Fig 6: Locating Rubber Catalytic Converter Hanger

GM609785

Courtesy of GENERAL MOTORS CORP.

Remove the catalytic converter from the rubber catalytic converter hangers.
Remove the catalytic converter and gasket from the vehicle.
Remove the heated oxygen sensors (HO2S) as necessary.