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 946 (ENGINE COOLING SYSTEM)
2006 Pontiac G6 GTP, 2D Coupe, Standard
Section 946 (Engine Cooling System)
2006 Pontiac G6 GTP, 2D Coupe, StandardSECTION Section 946 (Engine Cooling System)
WARNING: This page is about a different car, the 2007 Buick Lucerne. 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 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 (Static Fill)
- Draining and Filling Cooling System (Vac-N-Fill)
- Flushing
- Radiator Cleaning
- Surge Tank Replacement (LD8)
- Coolant Recovery Reservoir Replacement
- Surge Tank Hose/Pipe Replacement - Inlet (LD8)
- Surge Tank Hose/Pipe Replacement - Outlet (LD8)
- Radiator Inlet Hose Replacement (L26)
- Radiator Inlet Hose Replacement (LD8)
- Radiator Outlet Hose Replacement (L26)
- Radiator Outlet Hose Replacement (LD8)
- Radiator Vent Inlet Hose Replacement
- Cooling Fan Replacement - Electric
- Cooling Fan Motor Replacement - Electric
- Thermostat Replacement (RPO L26)
- Thermostat Replacement (RPO LD8)
- Engine Coolant Crossover Pipe Replacement (RPO LD8)
- Thermostat Bypass Pipes Replacement (RPO L26)
- Water Pump Drive Belt Tensioner Shield Replacement (RPO LD8)
- Water Pump Pulley Replacement (RPO LD8)
- Water Pump Drive Belt Tensioner Replacement (RPO LD8)
- Water Pump Belt Replacement (RPO LD8)
- Water Pump Replacement (RPO L26)
- Water Pump Replacement (RPO LD8)
- Fan Shroud Replacement (L26)
- Fan Shroud Replacement (LD8)
- Radiator Replacement (L26)
- Radiator Replacement (LD8)
- Radiator Support Bracket Replacement
- Coolant Heater Replacement (RPO L26)
- Coolant Heater Replacement - Left Side (RPO LD8)
- Coolant Heater Replacement - Right Side (RPO LD8)
- Coolant Heater Cord Replacement (RPO LD8)
- Coolant Heater Cord Replacement (RPO L26)
- 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.