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 1450 (ENGINE COOLING SYSTEM)REPAIR INSTRUCTIONSWATER PUMP REPLACEMENT (LY7, LLT)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 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: View Of Water Pump

Courtesy of GENERAL MOTORS CORP.

Install a NEW water pump seal.
Install the water pump.

NOTE: Refer to Fastener Notice .

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 and the water pump pulley bolts.

Fig 3: Securing Water Pump Pulley With EN 46104

Courtesy of GENERAL MOTORS CORP.

Use the EN 46104 (1) in order to retain the water pump pulley. See Special Tools .
Install the water pump pulley bolts.
Tighten: Tighten the water pump pulley bolts to 12 N.m (106 lb in).
Install the generator drive belt. Refer to Water Pump and Generator Belt Replacement .
Fill the cooling system. Refer to Cooling System Draining and Filling (GE 47716) or Cooling System Draining and Filling (Static Fill) .

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.