GM Service Manual Online
For 1990-2009 cars only

Exhaust Manifold Heat Shield Replacement - Left Side LY7

Removal Procedure

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

Caution: Refer to Protective Goggles and Glove Caution 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. Notice: Refer to Fastener Notice in the Preface section.

  3. Install the exhaust manifold heat shield bolts.
  4. Tighten
    Tighten the bolts to 10 N·m (89 lb in).

  5. 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

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

Caution: Refer to Protective Goggles and Glove Caution 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. Notice: Refer to Fastener Notice in the Preface section.

  3. Install the exhaust manifold heat shield bolts.
  4. Tighten
    Tighten the bolts to 10 N·m (89 lb in).

  5. Install the bank 2 sensor 1 HO2S. Refer to Heated Oxygen Sensor Replacement - Bank 2 Sensor 1.