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 MANUALSPONTIAC2006G6 GTP, 2D COUPE, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 988 (ENGINE COOLING SYSTEM)
2006 Pontiac G6 GTP, 2D Coupe, Standard
Section 988 (Engine Cooling System)
2006 Pontiac G6 GTP, 2D Coupe, StandardSECTION Section 988 (Engine Cooling System)
WARNING: This page is about a different car, the 2007 Pontiac Montana SV6, 2007 Chevrolet Uplander, and 2007 Buick Terraza. 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 Code Index
- Diagnostic Starting Point - Engine Cooling
- Scan Tool Output Controls
- Scan Tool Data List
- Scan Tool Data Definitions
- DTC P0480 or P0481
- DTC P1258
- Symptoms - Engine Cooling
- Engine Coolant Temperature Indicator Diagnosis
- 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 (Static Fill LZ9)
- Draining and Filling Cooling System (Vac-N-Fill)
- Flushing
- Radiator Cleaning
- Coolant Recovery Reservoir Replacement
- Radiator Inlet Hose Replacement (LZ9)
- Radiator Outlet Hose Replacement (LZ9)
- Cooling Fan and Shroud Replacement (LZ9)
- Engine Coolant Thermostat Housing Replacement
- Thermostat Replacement
- Engine Coolant Crossover Pipe Replacement
- Water Pump Replacement
- Radiator Replacement
- Radiator Air Baffle Assemblies and Deflectors
- Coolant Heater Replacement
- Coolant Heater Cord Replacement
- Description and Operation
- Special Tools and Equipment
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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:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.