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 MANUALSCHEVROLET2006CHEVY EXPRESS G2500, VAN CARGO, 6.6 2REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1094 (ENGINE COOLING SYSTEM)REPAIR INSTRUCTIONSWATER PUMP REPLACEMENT (LMM)INSTALLATION PROCEDURE

2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2

Installation Procedure

2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2SECTION Installation Procedure

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Water Pump Outlet Pipe Gasket, Water Pump, O-Ring, Nut And Bolts

Courtesy of GENERAL MOTORS CORP.

Lubricate the water pump O-ring with engine oil.
Install the water pump outlet pipe gasket (4) and the lubricated water pump O-ring (3).
NOTE: Refer to Fastener Notice .
Install the water pump nut (1) and bolts (2). Ensure the correct length bolt is used in the proper location and tighten to 25 N.m (18 lb ft)

Fig 2: Identifying Water Pump Outlet Pipe Nuts & Studs
Courtesy of GENERAL MOTORS CORP.
Install the engine wiring harness retainer on the water pump outlet pipe inner stud.
Install the water pump bolts. Ensure the correct length bolt is used in the proper location.Install the water pump to water pump outlet pipe nuts (2) to the studs (1) and tighten to 25 N.m (18 lb ft).
Install the crankshaft balancer. Refer to Crankshaft Balancer Replacement .
Install the thermostat bypass pipe. Refer to Thermostat Bypass Pipe Replacement Diesel .
Install the radiator outlet hose. Refer to Radiator Outlet Hose Replacement
Install the left wheelhouse inner panel. Refer to Front Wheelhouse Liner Replacement - Left Side (Chevrolet) or Front Wheelhouse Liner Replacement - Left Side (GMC) .

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.