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 MANUALSCHEVROLET2008CHEVY EXPRESS G3500, VAN PASSENGER EXTENDEDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 897 (ENGINE COOLING SYSTEM)
2008 Chevrolet Chevy Express G3500, Van Passenger Extended
Section 897 (Engine Cooling System)
2008 Chevrolet Chevy Express G3500, Van Passenger ExtendedSECTION Section 897 (Engine Cooling System)
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Schematic Wiring Diagrams
- Diagnostic Information and Procedures
- Diagnostic Code Index
- DTC P0480 or P0481 (without HP2)
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Typical Scan Tool Data
- 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
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Component Testing
- Repair Instructions
- DTC P0480, P0481, or P0482 (with HP2)
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Typical Scan Tool Data
- 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
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Component Testing
- Repair Instructions
- DTC P1258
- Symptoms - Engine Cooling
- Cooling Fan Always On (without HP2)
- Cooling Fan Always On (with HP2)
- Cooling Fan Inoperative (without HP2)
- Cooling Fan Inoperative (with HP2)
- 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 (HP2)
- Radiator Surge Tank Outlet Hose/Pipe Replacement (4.8L, 5.3L, and 6.0L Engines)
- 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 Connector Replacement (Radiator)
- Engine Oil Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection
- Engine Oil Cooler Hose/Pipe Replacement
- Fan Replacement (Mechanical)
- Engine Coolant Fan Replacement (Non-HP2)
- Engine Coolant Fan Replacement (HP2)
- Engine Coolant Fan Motor Replacement (Non-HP2)
- Engine Coolant Fan Motor Replacement (HP2)
- Cooling Fan and Shroud Replacement (HP2)
- Cooling Fan and Shroud Replacement (Non-HP2)
- Engine Coolant Fan Resistor Replacement (Right HP2)
- Engine Coolant Fan Resistor Replacement (Left HP2)
- Engine Coolant Thermostat Housing Replacement (LFA, LH6, LMG, LY2, LY5, LY6)
- Engine Coolant Thermostat Replacement (Gas)
- Engine Coolant Air Bleed Pipe Replacement (without AFM)
- Engine Coolant Air Bleed Pipe Replacement (with AFM)
- Engine Coolant Air Bleed Hose Replacement
- Water Pump Replacement
- Engine Coolant Fan Upper Shroud Replacement (Mechanical)
- Engine Coolant Fan Lower Shroud Replacement (Mechanical)
- Radiator Replacement (HP2)
- Radiator Replacement (Non HP2)
- Radiator Air Upper Baffle and Deflector Replacement (Cadillac)
- Radiator Air Upper Baffle and Deflector Replacement (Yukon)
- Coolant Heater Replacement (With LC9, L76, or L92)
- Coolant Heater Replacement (With LY2, LMG, LY5, LY6 or LFA)
- Coolant Heater Cord Replacement (With LY2, LY5 or LMG)
- Coolant Heater Cord Replacement (With LC9, LY6, L92 or LFA)
- Coolant Heater Cord Replacement (With 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.