Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 573 (AUTOMATIC TRANSMISSION - 4L60-E/4L65-E (INTRODUCTION, SERVICE & REPLACEMENT))REPAIR INSTRUCTIONSPRESSURE REGULATOR REPLACEMENTINSTALLATION PROCEDURE

2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6

Installation Procedure

2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Installation Procedure

WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: View Of Reverse Boost Valve, Pressure Regulator Valve & Components

Courtesy of GENERAL MOTORS CORP.

Install the pressure regulator valve (1).
Install the pressure regulator isolator spring (3) and the pressure regulator valve spring (2).
Install the reverse boost valve (4) in the reverse boost valve sleeve (5).
Install the reverse boost valve (4) and sleeve (5) in the oil pump cover.

Fig 2: Locating Reverse Boost Valve

Courtesy of GENERAL MOTORS CORP.

Compress the reverse boost valve sleeve into the bore of the oil pump to expose the retaining ring slot.
Install the reverse boost valve retaining ring, then slowly release tension on the reverse boost valve sleeve.
Install the transmission oil filter and pan. Refer to Automatic Transmission Fluid/Filter Replacement .
Lower the vehicle.
Fill the transmission to the proper level with DEXRON® III transmission fluid. Refer to Transmission Fluid Checking Procedure .

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.