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 504 (ENGINE COOLING SYSTEM)
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2
Section 504 (Engine Cooling System)
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2SECTION Section 504 (Engine Cooling System)
WARNING: This page is about a different car, the 2003 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Schematic and Routing Diagrams
- Component Locator
- Diagnostic Information and Procedures
- Diagnostic Starting Point - Engine Cooling
- Diagnostic System Check - Engine Cooling
- Scan Tool Data List
- Scan Tool Data Definitions
- DTC P0480: Improper Voltage Level On Low Speed Cooling Fan Relay Control Circuit
- DTC P0481: Improper Voltage Level On High Speed Cooling Fan Relay Control Circuit
- DTC P1258: Engine Over Temperature Condition
- Symptoms - Engine Cooling
- Thermostat Diagnosis
- Pressure Cap Testing
- Coolant Leak Testing
- Repair Instructions
- Draining and Filling Cooling System
- Flushing
- Surge Tank Replacement
- Radiator Hose Replacement - Inlet
- Radiator Hose Replacement - Outlet
- Throttle Body Heater Hose Replacement - Outlet
- Cooling Fan Replacement - Electric
- Cooling Fan Motor Replacement - Electric
- Cooling Fan Relay Replacement
- Thermostat Replacement
- Coolant Air Bleed Pipe Assembly Replacement
- Coolant Air Bleed Hose Replacement
- Water Pump Replacement
- Drain Cock Replacement
- Fan Shroud Replacement
- Radiator Replacement
- Radiator Support Replacement
- Radiator Air Baffle Assemblies and Deflectors
- Coolant Heater Replacement
- Coolant Heater Cord Replacement
- Description and Operation
- Special Tools and Equipment
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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.