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 G3500, VAN PASSENGER EXTENDEDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 442 (ENGINE CONTROLS AND FUEL - 3.6L - INTRODUCTION)REPAIR INSTRUCTIONSFUEL PUMP REPLACEMENT (LLT)REMOVAL PROCEDURE

2008 Chevrolet Chevy Express G3500, Van Passenger Extended

Removal Procedure

2008 Chevrolet Chevy Express G3500, Van Passenger ExtendedSECTION Removal Procedure

WARNING: This page is about a different car, the 2009 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.

Relieve the low and high side fuel system pressure. Refer to Fuel Pressure Relief (With High Pressure Pump - LLT) .
Remove the cross vehicle brace. Refer to Cross Vehicle Brace Replacement .
Remove the high pressure fuel pump shield. Refer to Fuel Pipe Shield Replacement (LLT) .
Remove the intake manifold. Refer to Intake Manifold Replacement .
Remove the wiper module. Refer to Windshield Wiper Motor Replacement .

Fig 1: Identifying Engine Wiring Harness Electrical Connector

Courtesy of GENERAL MOTORS CORP.

Disconnect the engine wiring harness electrical connector from the high pressure fuel pump.
Remove the radiator surge tank outlet pipe.
Remove the low pressure feed pipe. Refer to Fuel Feed Pipe Replacement (LLT) .
Remove the high pressure pipe. Refer to Fuel Feed Intermediate Pipe Replacement (LLT) . Discard this pipe.
Remove and discard the high pressure fuel pump bolts (4).
Remove the high pressure fuel pump (3).
Remove and discard the high pressure fuel pump gasket (2).
Remove and discard the high pressure fuel pump O-ring.
Remove the high pressure fuel pump roller lifter.

RENDER: 1.0x

NO RELATED

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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.