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 1426 (ENGINE COOLING SYSTEM)
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2
Section 1426 (Engine Cooling System)
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2SECTION Section 1426 (Engine Cooling System)
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Schematic and Routing Diagrams
- Diagnostic Information and Procedures
- Diagnostic Code Index
- Diagnostic Starting Point - Engine Cooling
- DTC P0480 or P0481
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the MIL/DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Procedures
- DTC P0480, P0481, or P0482 (Hybrid)
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the MIL/DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Procedures
- DTC P1258 (LFA)
- DTC P1258 (w/o LFA)
- Symptoms - Engine Cooling
- Cooling Fan Always On (w/LFA)
- Cooling Fan Always On (w/o LFA)
- Cooling Fan Inoperative (w/o LFA)
- Cooling Fan Inoperative (w/ LFA)
- Engine Overheating
- Loss of Coolant
- Thermostat Diagnosis
- Coolant Heater Inoperative
- Engine Fails To Reach Normal Operating Temperature
- Pressure Cap Testing
- Coolant Leak Testing
- Repair Instructions
- Cooling System Draining and Filling (Static Fill)
- Flushing
- Radiator Cleaning
- Radiator Surge Tank Replacement (Non-HP2)
- Radiator Surge Tank Replacement (HP2)
- Radiator Surge Tank Inlet Hose/Pipe Replacement (Non-HP2)
- Radiator Surge Tank Inlet Hose/Pipe Replacement (HP2)
- Radiator Surge Tank Outlet Hose/Pipe Replacement (4.8L, 5.3L, and 6.0L Engines)
- Radiator Surge Tank Outlet Hose/Pipe Replacement (HP2)
- Radiator Inlet Hose Replacement (Non-HP2)
- Radiator Inlet Hose Replacement (HP2)
- Radiator Outlet Hose Replacement (Non-HP2)
- Radiator Outlet Hose Replacement (HP2)
- Radiator Vent Inlet Hose Replacement (Non-HP2)
- Radiator Vent Inlet Hose Replacement (HP2)
- Engine Oil Cooler Pipe/Hose Quick Connect Fitting
- Engine Oil Cooler Hose/Pipe Replacement
- Fan Replacement (Mechanical)
- Engine Cooling Fan Replacement (Non-HP2)
- Engine Cooling Fan Replacement (HP2)
- Engine Coolant Fan Motor Replacement (Non-HP2)
- Engine Coolant Fan Motor Replacement (HP2)
- Cooling Fan and Shroud Replacement (Non-HP2)
- Cooling Fan and Shroud Replacement (HP2)
- Engine Coolant Fan Resistor Replacement (Left-HP2)
- Engine Coolant Fan Resistor Replacement (Right-HP2)
- Engine Coolant Thermostat Housing Replacement (LY2, LH6, LY5, LMG, LY6)
- Engine Coolant Thermostat Replacement
- Coolant Air Bleed Pipe Assembly Replacement (RPOs LY2/LY6)
- Coolant Air Bleed Pipe Assembly Replacement (RPOs LC9/LY5/LMG/L76/L92/LFA)
- Engine Coolant Air Bleed Hose Replacement
- Water Pump Replacement (RPOs LY2/LC9/LY5/LMG/LFA)
- Water Pump Replacement (RPOs LY6/L76/L92)
- Engine Coolant Fan Upper Shroud Replacement (Mechanical)
- Engine Coolant Fan Lower Shroud Replacement (Mechanical)
- Radiator Replacement (Non-HP2)
- Radiator Replacement (HP2)
- Radiator Air Upper Baffle and Deflector Replacement (Cadillac)
- Radiator Air Upper Baffle and Deflector Replacement (Yukon)
- Coolant Heater Replacement (RPOs LY2/LMG/LY5/LY6)
- Coolant Heater Replacement (RPOs LC9/L76/L92)
- Coolant Heater Cord Replacement (RPOs LC9/L76/L92/LFA)
- Coolant Heater Cord Replacement (RPOs LY2/LY5/LMG)
- Coolant Heater Cord Replacement (RPO LY6)
- 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.