Removal Procedure

WARNING: This page is about a different car, the 2018 Chevrolet Suburban 3500 HD. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Engine Harness Electrical Connectors, Negative Battery Cable And Engine Harness Ground

Courtesy of GENERAL MOTORS COMPANY

Remove the intake manifold. Refer to Intake Manifold Replacement .
Disconnect the engine harness electrical connector (1) from the oil pressure sensor.

Fig 2: Valve Lifter Oil Manifold Handling Precaution

Courtesy of GENERAL MOTORS COMPANY

DO NOT lift the valve lifter oil manifold by the electrical lead frame.

Fig 3: Valve Lifter Oil Manifold And Bolts

Courtesy of GENERAL MOTORS COMPANY

Remove the valve lifter oil manifold bolts (2).
Remove the valve lifter oil manifold (1).

Fig 4: Gasket Retaining Strap Locations

Courtesy of GENERAL MOTORS COMPANY

NOTE:

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.

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

Fig 5: Cutting Gasket Retaining Straps

Courtesy of GENERAL MOTORS COMPANY

Using a cutter type tool, cut the 8 retaining straps.

Fig 6: Valve Lifter Oil Manifold Outer Gasket

Courtesy of GENERAL MOTORS COMPANY

Remove the outer gasket (1) from the valve lifter oil manifold.