GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 1403316  Size: SH
  1. Remove the intake manifold. Refer to Intake Manifold Replacement .
  2. Remove the engine valley cover bolts (506).
  3. Remove the engine valley cover (555), gasket (556), and the O-rings (537) from the cover.
  4. Remove the oil pressure sensor and washer as required.
  5. Discard the old gaskets and O-rings. DO NOT reuse. Use NEW gaskets and O-rings ONLY.

Installation Procedure


    Object Number: 1403316  Size: SH

    Important: All gasket surfaces should be free of oil and other foreign material during assembly.

  1. Lubricate the O-ring seals with clean engine oil.
  2. Install the O-rings (537) to the cover (555).
  3. Notice: Refer to Fastener Notice in the Preface section.

  4. Install the cover (555), gaskets (556), and bolts (506).
  5. Tighten
    Tighten the cover bolts to 25 N·m (18 lb ft).

  6. Apply sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the threads of the sensor.
  7. Install the oil pressure sensor and sealing washer.
  8. Tighten
    Tighten the sensor to 20 N·m (15 lb ft).

  9. Install the intake manifold. Refer to Intake Manifold Replacement .