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 640 (ENGINE COOLING SYSTEM)REPAIR INSTRUCTIONSWATER PUMP REPLACEMENT (3.8L)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 2002 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.

Install the water pump gasket.
Install the water pump.
NOTE: Refer to FASTENER NOTICE .
Install the water pump bolts.
Tighten
- Tighten the long water pump bolts to 34 N.m (25 Ib ft).
- Tighten the short water pump bolts to 22 N.m (16 Ib ft).
  
  Fig 1: Water Pump & Gasket
  Courtesy of GENERAL MOTORS CORP.
Install the water pump pulley.
Install the water pump pulley bolts.
Tighten

Tighten the water pump pulley bolts to 13 N.m (115 Ib in).
Install the power steering pump and the power steering bolts. Refer to POWER STEERING PUMP REPLACEMENT (3.8L) or POWER STEERING PUMP REPLACEMENT (3.1 L) .
Install the drive belt. Refer to DRIVE BELT REPLACEMENT (L36) or DRIVE BELT REPLACEMENT (L67) .
Fill the cooling system. Refer to Draining and Filling Cooling System .
Inspect for leaks.

Fig 2: Water Pump Pulley & Bolts
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.