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 MANUALSPONTIAC2008GRAND PRIX BASEREPAIR AND DIAGNOSISHEATING, VENTILATION & A/C (HVAC)HVAC CONTROL SYSTEMSHVAC SYSTEM - AUTOMATIC
2008 Pontiac Grand Prix Base
HVAC System - Automatic
2008 Pontiac Grand Prix BaseSECTION HVAC System - Automatic
- Specifications
- Schematic and Routing Diagrams
- Diagnostic Information and Procedures
- Diagnostic Code Index
- DTC B0160 or B0161
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Component Testing
- Repair Procedures
- DTC B0164, B0174, B0179, B0510, or B0515
- DTC B0184 or B0189
- DTC B0248, B0249, B0268, B0269, B0408, B0409, B0414, B0418, B0419, B0424, B3748 or B3749
- DTC P0530, P0532, or P0533
- Diagnostic Instructions
- DTC Descriptor
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Component Testing
- Repair Procedures
- DTC P0645, P0646, or P0647 (RPO L26/L32)
- Diagnostic Instructions
- DTC Descriptor
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Diagnostic Aids
- Reference Information
- Circuit/System Testing
- Component Testing
- Repair Procedures
- DTC P0645, P0646, or P0647 (RPO LS4)
- Symptoms - HVAC Systems - Automatic
- Air Conditioning Compressor Malfunction (RPO L26/L32)
- Air Conditioning Compressor Malfunction (RPO LS4)
- Blower Motor Malfunction
- Actuator Recalibration
- Repair Instructions
- HVAC Control Module Replacement
- Recirculation Actuator Replacement
- Mode Actuator Replacement
- Air Temperature Actuator Replacement - Right Side
- Air Temperature Actuator Replacement - Left Side
- Air Temperature Sensor Replacement - Upper Right Side
- Air Temperature Sensor Replacement - Upper Left Side
- Air Temperature Sensor Replacement - Lower Left Side
- Air Temperature Sensor Replacement - Lower Right Side
- Ambient Air Temperature Sensor Replacement
- Inside Air Temperature Sensor Replacement
- Sun Load Sensor Replacement
- Description and Operation
- Special Tools and Equipment
RENDER: 1.0x
NO RELATED
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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.