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 MANUALSBUICK2006TERRAZA CXL, 3.5 L, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 48 (ENGINE COOLING SYSTEM)
2006 Buick Terraza CXL, 3.5 L, AWD
Section 48 (Engine Cooling System)
2006 Buick Terraza CXL, 3.5 L, AWDSECTION Section 48 (Engine Cooling System)
WARNING: This page is about a different car, the 2005 Buick LaCrosse and 2005 Buick Allure. 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 P0480, P0481, P0691, P0692, P0693, or P0694
- DTC P1258
- Symptoms - Engine Cooling
- Engine Coolant Temperature Indicator Always On
- Cooling Fan Always On
- Cooling Fan Inoperative
- Engine Overheating (LY7)
- Loss of Coolant
- Thermostat Diagnosis (LY7)
- Coolant Heater Inoperative
- Engine Fails To Reach Normal Operating Temperature (LY7)
- Pressure Cap Testing
- Coolant Leak Testing
- Repair Instructions
- Draining and Filling Cooling System (LY7)
- Draining and Filling Cooling System (L26)
- Flushing
- Radiator Cleaning
- Coolant Recovery Reservoir Replacement
- Radiator Hose Replacement - Inlet (3.8L)
- Radiator Hose Replacement - Inlet (3.6L)
- Radiator Hose Replacement - Outlet (3.8L)
- Radiator Hose Replacement - Outlet (3.6L)
- Throttle Body Heater Hose/Pipe Replacement - Inlet (LY7)
- Cooling Fan Motor Replacement - Electric (L26)
- Cooling Fan Motor Replacement - Electric (LY7)
- Thermostat Housing Replacement (RPOs L26/L32)
- Thermostat Housing Replacement (LY7)
- Thermostat Replacement (RPOs L26/L32)
- Radiator Pipe Replacement - Outlet
- Water Pump Replacement (LY7)
- Water Pump Replacement (RPOs L26/L32)
- Drain Cock Replacement
- Fan Shroud Replacement (LY7)
- Fan Shroud Replacement (L26)
- Radiator Replacement
- Radiator Air Baffle and Deflector Replacement - Lower
- Radiator Air Baffle and Deflector Replacement - Side
- Radiator Air Baffle and Deflector Replacement - Upper
- Coolant Heater Replacement (LY7)
- Coolant Heater Replacement (3.8L)
- Coolant Heater Cord Replacement (3.8L)
- 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.