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 MANUALSCHEVROLET2006CHEVY EXPRESS G2500, VAN CARGO, 6.6 2REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 2 (ENGINE CONTROL SYSTEM - 4.3L - INTRODUCTION (2 OF 2))REPAIR INSTRUCTIONSFUEL PRESSURE REGULATOR REPLACEMENTINSTALLATION PROCEDURE

2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2

Installation Procedure

2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2SECTION Installation Procedure

WARNING: This page is about a different variant/trim than selected.

IMPORTANT: If the fuel pressure regulator is to be reinstalled, inspect the filter screen for contamination. If the filter screen is contaminated, replace the regulator.

Fig 1: Exploded View Of Fuel Injector Assembly

Courtesy of GENERAL MOTORS CORP.

Lubricate the new O-rings with clean engine oil.
Install the regulator seal backup ring (15).
Install the regulator seal upper O-ring (16).
Install the regulator assembly filter (17).
Install the regulator seal lower O-ring (18).
Assemble the regulator with the vacuum tube pointing down into the regulator retainer clip.
Install the fuel pressure regulator retainer clip (13).
Install the upper manifold assembly. Refer to Intake Manifold Replacement - Upper in Engine Mechanical-4.3L.
Tighten the fuel filler cap.
Connect the negative battery cable.
Inspect for leaks.
1. Turn ON the ignition for 2 seconds.
2. Turn OFF the ignition for 10 seconds.
3. Turn ON the ignition.
4. Inspect for fuel leaks.
Install the engine cover. Refer to Engine Cover Replacement in Interior Trim.

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.