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 620 (ENGINE COOLING SYSTEM)REPAIR INSTRUCTIONSWATER PUMP REPLACEMENT (8.1L ENGINE)INSTALLATION 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 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Place NEW water pump gaskets into place.
Install the water pump.
NOTE: Refer to FASTENER NOTICE .
Install the water pump bolts.
Tighten

Tighten the bolts to 50 N.m (37 lb ft).

Fig 1: Install Water Pump, Gasket & Bolts
Courtesy of GENERAL MOTORS CORP.
Install the bypass hose.
Position the bypass hose clamps at the water pump and water crossover.

Fig 2: Install Bypass Hose
Courtesy of GENERAL MOTORS CORP.
Install the outlet hose to the water pump.
Position the outlet hose clamp at the water pump.
Install the fan clutch. Refer to Fan Clutch Replacement .
Install the drive belt.
Fill the cooling system. Refer to Draining and Filling Cooling System .

Fig 3: Install Outlet Hose
Courtesy of GENERAL MOTORS CORP.

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.