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 MANUALSPONTIAC2004GTO STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE MECHANICALCOOLING SYSTEM (MECHANICAL)ENGINE COOLING SYSTEM
2004 Pontiac GTO Standard
Engine Cooling System
2004 Pontiac GTO StandardSECTION Engine Cooling System
- 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 P0481
- DTC P1258
- DTC U1067
- Symptoms - Engine Cooling
- Cooling Fan Always On (Low Speed)
- Cooling Fan Always On (High Speed)
- Cooling Fan Inoperative (Low Speed)
- Cooling Fan Inoperative (High Speed )
- Cooling Fan Inoperative (One Fan Only)
- Engine Overheating
- Loss of Coolant
- Thermostat Diagnosis
- Engine Fails To Reach Normal Operating Temperature
- Repair Instructions
- Draining and Filling Cooling System
- Surge Tank Replacement
- Surge Tank Hose/Pipe Replacement
- Radiator Hose Replacement - Inlet (Lower)
- Radiator Hose Replacement - Inlet (Upper)
- Radiator 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 Pipe Replacement - Inlet
- Water Pump Replacement
- Fan Shroud Replacement
- Radiator Replacement
- Radiator Air Baffle Assemblies and Deflectors
- Description and Operation
RENDER: 1.0x
NO RELATED
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Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.