GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 1697098  Size: SH
  1. Remove the intake manifold. Refer to Intake Manifold Replacement .
  2. Disconnect the engine harness electrical connector (1) from the oil pressure sensor.

  3. Object Number: 1536553  Size: SH
  4. DO NOT lift the valve lifter oil manifold by the electrical lead frame.

  5. Object Number: 1509591  Size: SH
  6. Remove the valve lifter oil manifold bolts (2).
  7. Remove the valve lifter oil manifold (1).

  8. Object Number: 1402024  Size: SH

    Important: Remove only the outer gasket from the manifold. Do not disassemble any of the internal components of the manifold in an attempt to remove the 8 inner sealing gaskets. If the inner gaskets are cut or damaged, replace the manifold as an assembly. Only use a wire-cutter type tool in order to minimize the amount of debris. Do not use a rotary-type cutting tool on the retaining straps.

  9. Identify the 8 gasket retaining strap locations (1-8).

  10. Object Number: 1402010  Size: SH
  11. Using a cutter type tool, cut the 8 retaining straps.

  12. Object Number: 1509593  Size: SH
  13. Remove the outer gasket (1) from the valve lifter oil manifold.

Installation Procedure

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


    Object Number: 1509593  Size: SH
  1. Place the service gasket (1) onto the valve lifter oil manifold.

  2. Object Number: 1509591  Size: SH
  3. Install the valve lifter oil manifold (1) to the engine.
  4. Notice: Refer to Fastener Notice in the Preface section.

  5. Install the valve lifter oil manifold bolts (2).
  6. Tighten
    Tighten the bolts to 25 N·m (18 lb ft).


    Object Number: 1697098  Size: SH
  7. Connect the engine harness electrical connector (1) to the oil pressure sensor.
  8. Install the intake manifold. Refer to Intake Manifold Replacement .