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 MANUALSCHEVROLET2001CHEVY EXPRESS G3500, VAN PASSENGER EXTENDED, 6.5 FREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 536 (ENGINE COOLING SYSTEM)REPAIR INSTRUCTIONSWATER PUMP REPLACEMENT (LY7)INSTALLATION PROCEDURE

2001 Chevrolet Chevy Express G3500, Van Passenger Extended, 6.5 F

Installation Procedure

2001 Chevrolet Chevy Express G3500, Van Passenger Extended, 6.5 FSECTION Installation Procedure

WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Water Pump Components

Courtesy of GENERAL MOTORS CORP.

Install the NEW water pump gasket.
Install the water pump.

NOTE: Refer to Fastener Notice in Cautions and Notices.

Install the water pump bolts.
Tighten: Tighten the water pump bolts to 10 N.m (89 lb in).

Fig 2: View Of Water Pump Pulley

Courtesy of GENERAL MOTORS CORP.

Install the water pump pulley.

Fig 3: Securing Water Pump Pulley With EN 46104

Courtesy of GENERAL MOTORS CORP.

Use the EN 46104 in order to retain the water pump pulley.
Install the water pump pulley bolts.
Tighten: Tighten the water pump pulley bolts to 12 N.m (106 lb in).
Install the accessory drive belt. Refer to Drive Belt Replacement in Engine Mechanical - 3.6L (LY7).
Fill the cooling system. Refer to Draining and Filling Cooling System .

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.