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)
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2
Section 912 (Engine Cooling System)
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2SECTION Section 912 (Engine Cooling System)
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.
- Specifications
- Schematic and Routing Diagrams
- Component Locator
- Diagnostic Information and Procedures
- Diagnostic Starting Point - Engine Cooling
- Scan Tool Output Controls
- Scan Tool Data List
- Scan Tool Data Definitions
- DTC P1258
- Symptoms - Engine Cooling
- Low Engine Coolant Indicator Always On
- Engine Overheating
- Loss of Coolant
- Thermostat Diagnosis
- Coolant Heater Inoperative (Diesel)
- Coolant Heater Inoperative (Gasoline)
- Engine Fails To Reach Normal Operating Temperature
- Pressure Cap Testing
- Coolant Leak Testing
- Fan Clutch Diagnosis
- Repair Instructions
- Draining and Filling Cooling System (Static Fill)
- Draining and Filling Cooling System (Vac N Fill)
- Flushing
- Radiator Cleaning
- Cooling Layer Removal
- Cooling Layer Installation
- Surge Tank Replacement
- Coolant Recovery Reservoir Replacement
- Radiator Surge Tank Inlet Hose/Pipe Replacement
- Radiator Inlet Hose Replacement (LLY)
- Radiator Inlet Hose Replacement (LU3, LR4, LM7, LQ4)
- Radiator Outlet Hose Replacement (LLY)
- Radiator Outlet Hose Replacement (LR4, LM7, LQ4)
- Radiator Outlet Hose Replacement (LU3)
- Radiator Hose Quick Connect Fitting
- Radiator Vent Inlet Hose Replacement
- Engine Oil Cooler Pipe/Hose Quick Connect Fitting
- Engine Oil Cooler Hose/Pipe Replacement
- Auxiliary Engine Oil Cooler Replacement
- Fan Replacement
- Fan Clutch Replacement
- Turbocharger Coolant Bypass Valve Replacement
- Turbocharger Coolant Hoses/Pipes Replacement (Inlet - LLY, LBZ)
- Turbocharger Coolant Hoses/Pipes Replacement (Outlet - LLY, LBZ)
- Turbocharger Coolant Hoses/Pipes Replacement (Outlet - LMM)
- Turbocharger Coolant Hoses/Pipes Replacement (Inlet - LMM)
- Exhaust Gas Recirculation Coolant Hoses/Pipes Replacement (LLY, LBZ)
- Exhaust Gas Recirculation Coolant Hoses/Pipes Replacement (LMM)
- Exhaust Gas Recirculation Cooling Pipe Replacement - Lower
- Exhaust Gas Recirculation Cooling Pipe Replacement - Upper
- Engine Coolant Thermostat Housing Replacement
- Thermostat Replacement (4.3L)
- Thermostat Replacement (6.6L (LLY, LBZ))
- Thermostat Replacement (6.6L (LMM))
- Thermostat Housing Crossover Replacement (LLY, LBZ)
- Thermostat Housing Crossover Replacement (LMM)
- Coolant Air Bleed Pipe Assembly Replacement (4.8L, 5.3L, and 6.0L Engines)
- Coolant Air Bleed Hose Replacement (4.8L, 5.3L, and 6.0L Engines)
- Thermostat Bypass Pipes Replacement
- Water Pump Replacement (4.3L Engine)
- Water Pump Replacement (4.8L, 5.3L and 6.0L Engine)
- Water Pump Replacement (6.6L Engine)
- Water Pump Outlet Pipe Replacement
- Engine Coolant Fan Upper Shroud Replacement (4.3L, 4.8L, 5.3L, 6.0L)
- Engine Coolant Fan Upper Shroud Replacement (6.6L)
- Engine Coolant Fan Lower Shroud Replacement (4.3L, 4.8L, 5.3L, 6.0L)
- Engine Coolant Fan Lower Shroud Replacement (6.6L)
- Radiator Replacement (Diesel)
- Radiator Replacement (Gas)
- Coolant Heater Replacement (4.3L)
- Coolant Heater Replacement (4.8L, 5.3L (except RPO L33), 6.0L)
- Coolant Heater Replacement (6.6L)
- Coolant Heater Cord Replacement (4.3L Engine)
- Coolant Heater Cord Replacement (4.8L, 5.3L And 6.0L Engine)
- Coolant Heater Cord Replacement (6.6L Engine)
- 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.