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 465 (ENGINE COOLING SYSTEM)REPAIR INSTRUCTIONSWATER PUMP REPLACEMENT (2.2L)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 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.

Install the water pump gasket to the engine.

Fig 1: Installing Water Pump Gasket To Engine
Courtesy of GENERAL MOTORS CORP.
Install the water pump to the engine.
Apply a sealer (GM P/N 12346004) to the bolt threads.
NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
Install the water pump mounting bolts.
Tighten

Tighten the water pump mounting bolts to 25 N.m (18 lb ft).

Fig 2: Installing Water Pump Mounting Bolts
Courtesy of GENERAL MOTORS CORP.
Install the water pump pulley.
Install the water pump pulley bolts.
Tighten

Tighten the water pump pulley bolts to 25 N.m (18 lb ft).

Fig 3: Installing Water Pump Pulley
Courtesy of GENERAL MOTORS CORP.
Install the radiator inlet hose to the water pump.
Install the radiator inlet hose clamp to the water pump.
Fill the cooling system. Refer to DRAINING AND FILLING COOLING SYSTEM .
Inspect the cooling system for leaks.

Fig 4: Installing Radiator Inlet Hose
Courtesy of GENERAL MOTORS CORP.

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.