GM Service Manual Online
For 1990-2009 cars only

Exhaust Manifold Heat Shield Replacement - Right Side LY7

Removal Procedure

    Warning: Refer to Exhaust Service Warning in the Preface section.

    Warning: Refer to Protective Goggles and Glove Warning in the Preface section.


    Object Number: 1840646  Size: SH
  1. Remove the bank 1 sensor 1 heated oxygen sensor (HO2S). Refer to Heated Oxygen Sensor Replacement - Bank 1 Sensor 1.
  2. Raise the vehicle to an appropriate height to reach the heat shield bolts. Refer to Lifting and Jacking the Vehicle.
  3. Remove the exhaust manifold heat shield bolts.
  4. Note: It may be necessary to gently pull down on the catalytic converter in order to remove the heat shield.

  5. Remove the exhaust manifold heat shield.

Installation Procedure


    Object Number: 1840646  Size: SH

    Note: It may be necessary to gently pull down on the catalytic converter in order to install the heat shield.

  1. Install and position the exhaust manifold heat shield onto the exhaust manifold.
  2. Caution: Refer to Fastener Caution in the Preface section.

  3. Install the exhaust manifold heat shield bolts and tighten to 10 N·m (89 lb in).
  4. Install the bank 1 sensor 1 HO2S. Refer to Heated Oxygen Sensor Replacement - Bank 1 Sensor 1.

Exhaust Manifold Heat Shield Replacement - Right Side LZ4

Removal Procedure

Warning: Refer to Exhaust Service Warning in the Preface section.

Warning: Refer to Protective Goggles and Glove Warning in the Preface section.


    Object Number: 1585295  Size: SH
  1. Remove the bank 1 sensor 1 heated oxygen sensor (HO2S). Refer to Heated Oxygen Sensor Replacement - Bank 1 Sensor 1.
  2. Remove the exhaust manifold heat shield bolts.
  3. Remove the exhaust manifold heat shield.

Installation Procedure


    Object Number: 1585295  Size: SH
  1. Install the exhaust manifold heat shield.
  2. Caution: Refer to Fastener Caution in the Preface section.

  3. Install the exhaust manifold heat shield bolts and tighten to 10 N·m (89 lb in).
  4. Install the bank 1 sensor 1 HO2S. Refer to Heated Oxygen Sensor Replacement - Bank 1 Sensor 1.