GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2009 🢒 Malibu 🢒 Preface 🢒 Dangers, Warnings, and Cautions 🢒 Catalytic Converter Replacement

Catalytic Converter Replacement LE5 With MH8

Removal Procedure
  1. Raise and suppore the vehicle. Refer to Lifting and Jacking the Vehicle
  2. Remove the heated oxygen sensor. Refer to Heated Oxygen Sensor Replacement - Sensor 2.

    3. Object Number: 2081577 Size: SH
  3. Remove the catalytic converter to muffler nuts (1).
  4. Separate the exhaust pipe (2) from the catalytic converter studs.
  5. Position and support the exhaust pipe (2) out of the way.

    6. Object Number: 2081582 Size: SH
  6. Remove the converter to bracket bolt (1).
  7. Remove the catalytic converter to exhaust manifold nuts (3).
  8. Remove the catalytic converter (2) and gasket. Discard the Catalytic converter gaskets.

Installation Procedure

    Object Number: 2081582 Size: SH
  1. Install a NEW gasket to the catalytic converter.
  2. Position the catalytic converter (2) to the exhaust manifold and converter bracket.
  3. Loosley install the converter to manifold nuts (3) and converter bracket bolt (1).

    4. Caution: Refer to Fastener Caution in the Preface section.

  4. Tighten the converter to manifold nuts to 25 N·m (18 lb ft).
  5. Tighten the Converter to bracket bolt to 30 N·m (22 lb ft).

    6. Object Number: 2081577 Size: SH
  6. Install a NEW gasket between the converter and exhaust pipe (2).
  7. Connect the exhaust pipe to the converter and tighten the nuts (1) to 25 N·m (18 lb ft).
  8. Install the heated oxygen sensor. Refer to Heated Oxygen Sensor Replacement - Sensor 2.
  9. Lower the vehicle

Catalytic Converter Replacement LAT or LE5

Removal Procedure

    Object Number: 2017967 Size: SH
  1. Remove the heated oxygen sensor. Refer to Heated Oxygen Sensor 2 Replacement.
  2. Remove the catalytic converter to exhaust manifold nuts (1).

    3. Object Number: 2018062 Size: SH
  3. Remove the catalytic converter to muffler nuts (1).
  4. Separate the exhaust pipe from the catalytic converter studs.
  5. Position and support the exhaust pipe out of the way.
  6. Remove the catalytic converter (2) and gasket.

Installation Procedure

    Object Number: 2018062 Size: SH
  1. Install the catalytic converter (2) along with a NEW gasket to the exhaust manifold.
  2. Position and join the exhaust pipe to the catalytic converter studs.

    3. Caution: Refer to Fastener Caution in the Preface section.

  3. Install the catalytic converter to muffler nuts and tighten to 17 N·m (13 lb ft).

    4. Object Number: 2017967 Size: SH
  4. Install the catalytic converter to exhaust manifold nuts (1) and tighten to 50 N·m (37 lb ft).
  5. Install the heated oxygen sensor. Refer to Heated Oxygen Sensor 2 Replacement.