GM Service Manual Online
For 1990-2009 cars only

Exhaust Manifold Heat Shield Replacement - Left 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: 1840643  Size: SH
  1. Remove the bank 2 sensor 1 heated oxygen sensor (HO2S). Refer to Heated Oxygen Sensor Replacement - Bank 2 Sensor 1.
  2. Remove the exhaust manifold heat shield bolts.
  3. Remove the exhaust manifold heat shield.

Installation Procedure


    Object Number: 1840643  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 2 sensor 1 HO2S. Refer to Heated Oxygen Sensor Replacement - Bank 2 Sensor 1.

Exhaust Manifold Heat Shield Replacement - Left 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: 1585276  Size: SH
  1. Remove the bank 2 sensor 1 heated oxygen sensor (HO2S). Refer to Heated Oxygen Sensor Replacement - Bank 2 Sensor 1.
  2. Remove the exhaust manifold heat shield bolts.
  3. Remove the exhaust manifold heat shield.

Installation Procedure


    Object Number: 1585276  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 2 sensor 1 HO2S. Refer to Heated Oxygen Sensor Replacement - Bank 2 Sensor 1.