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 912 (ENGINE COOLING SYSTEM)REPAIR INSTRUCTIONSTHERMOSTAT REPLACEMENT (4.3L)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 Savana Special, 2007 GMC Savana Camper Special, 2007 GMC Savana, and 2007 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Refer to COOLANT ADDITION NOTICE .

Fig 1: Expanded View Of Thermostat Components

Courtesy of GENERAL MOTORS CORP.

Install the thermostat.
Install the thermostat housing to the intake manifold.

NOTE: Refer to FASTENER NOTICE .

Install the bolts to the housing.
Tighten: Tighten the bolts to 25 N.m (18 lb ft).

Fig 2: View Of Radiator Hose At Thermostat Housing

Courtesy of GENERAL MOTORS CORP.

Connect the radiator hose to the thermostat housing.
Install the coolant recovery reservoir. Refer to Coolant Recovery Reservoir Replacement .
Install the air cleaner and the duct. Refer to Air Cleaner Outlet Resonator Replacement .
Refill the cooling system. Refer to Draining and Filling Cooling System (Static Fill) or Draining and Filling Cooling System (Vac N Fill) .
Bleed the air from the cooling system.
Inspect the thermostat housing and the gasket for coolant leaks.

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.