GM Service Manual Online
For 1990-2009 cars only

Oil Pressure Relief Valve Replacement Primary

Removal Procedure

  1. Remove the oil pan. Refer to Oil Pan Replacement.

  2. Object Number: 2049577  Size: SH
  3. Remove the oil pressure relief valve plug (3).
  4. Remove the valve spring (2).
  5. Remove the valve piston (1).

Installation Procedure


    Object Number: 2049577  Size: SH
  1. Clean the plug thread, spring and piston (1).
  2. Install the valve piston (2).
  3. Install the valve spring (3).
  4. Caution: Refer to Fastener Caution in the Preface section.

  5. Install the oil pressure relief valve plug.
  6. Tighten
    Tighten the oil pressure relief valve plug to 21 N·m (15.5 lb ft).

  7. Install the oil pan. Refer to Oil Pan Replacement.

Oil Pressure Relief Valve Replacement Secondary

Removal Procedure

  1. Remove the oil pan. Refer to Oil Pan Replacement.

  2. Object Number: 2049579  Size: SH
  3. Remove the oil overpressure relief valve plug (3).
  4. Remove the valve spring (2).
  5. Remove the valve piston (1).

Installation Procedure


    Object Number: 2049579  Size: SH
  1. Clean the plug thread, spring and piston (1).
  2. Install the valve piston (2).
  3. Install the valve spring (3).
  4. Caution: Refer to Fastener Caution in the Preface section.

  5. Install the oil overpressure relief valve plug.
  6. Tighten
    Tighten the oil pressure relief valve plug to 10 N·m (88.5 lb in).

  7. Install the oil pan. Refer to Oil Pan Replacement.