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 MANUALSCHEVROLET2001CHEVY EXPRESS G2500, VAN CARGO EXTENDED, 5.7 R, L31/KL8REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 536 (ENGINE COOLING SYSTEM)
2001 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.7 R, L31/KL8
Section 536 (Engine Cooling System)
2001 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.7 R, L31/KL8SECTION Section 536 (Engine Cooling System)
WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. 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 Output Controls
- Scan Tool Data List
- Scan Tool Data Definitions
- Diagnostic Trouble Code (DTC) List
- DTC P0480, P0481, P0691, P0692, P0693, or P0694: Cooling Fan Relay
- DTC P1258: Engine Coolant Overtemperature - Protection Mode Active
- Symptoms - Engine Cooling
- Engine Coolant Temperature Indicator Always On
- Cooling Fan Always On
- Cooling Fan Inoperative
- 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
- Draining and Filling Cooling System
- Flushing
- Radiator Cleaning
- Coolant Recovery Reservoir Replacement
- Radiator Hose Replacement - Inlet (LA1)
- Radiator Hose Replacement - Inlet (LY7)
- Radiator Hose Replacement - Outlet (LA1)
- Radiator Hose Replacement - Outlet (LY7)
- Throttle Body Heater Hose Replacement - Inlet
- Throttle Body Heater Hose Replacement - Outlet
- Fan Replacement
- Cooling Fan Replacement - Electric (LA1)
- Cooling Fan Replacement - Electric (LY7)
- Cooling Fan Motor Replacement - Electric
- Thermostat Replacement (LA1)
- Thermostat Replacement (LY7)
- Water Outlet Housing Replacement (LA1)
- Water Outlet Housing Replacement (LY7)
- Coolant Pipe Replacement - Inlet
- Thermostat Bypass Pipes Replacement
- Water Pump Replacement (LA1)
- Water Pump Replacement (LY7)
- Fan Shroud Replacement (LA1)
- Fan Shroud Replacement (LY7)
- Radiator Replacement (LA1)
- Radiator Replacement (LY7)
- Radiator Air Baffle Assemblies and Deflectors
- Coolant Heater Replacement (LA1)
- Coolant Heater Replacement (LY7)
- Coolant Heater Cord Replacement (LA1)
- Coolant Heater Cord Replacement (LY7)
- 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.