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 MANUALSCHEVROLET2009TAHOE BASE, 4.8 CREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 152 (HVAC SYSTEM - AUTOMATIC)
2009 Chevrolet Tahoe Base, 4.8 C
Section 152 (HVAC System - Automatic)
2009 Chevrolet Tahoe Base, 4.8 CSECTION Section 152 (HVAC System - Automatic)
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Schematic and Routing Diagrams
- Diagnostic Information and Procedures
- Diagnostic Code Index
- DTC B0158, B0163, B0168, B0173, B0178, B0509, B0514, B3578 or B3583
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Diagnostic Aids
- 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 B0183 or B0188
- DTC B0228, B0413, B0423, B0433, B3779, or B3782
- 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
- Repair Procedures
- DTC B101D
- DTC B1023
- DTC B3844
- DTC P0532 or P0533
- 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
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Procedures
- DTC P0645
- Diagnostic Instructions
- DTC Descriptor
- Diagnostic Fault Information
- Circuit System Description
- Conditions for Running the DTC
- Conditions for Setting the DTCs
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Component Testing
- Repair Procedures
- DTC P2518
- 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
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Procedures
- Symptoms - HVAC Systems - Automatic
- Air Conditioning Compressor Malfunction
- Blower Motor Malfunction
- Auxiliary Blower Motor Malfunction
- Air Temperature Malfunction
- Afterblow Enabling
- Actuator Recalibration
- Repair Instructions
- HVAC Control Module Replacement
- Auxiliary Heater and Air Conditioning Control Module Replacement
- Recirculation Actuator Replacement
- Mode Actuator Replacement
- Temperature Valve Actuator Replacement
- Temperature Valve Actuator Replacement - Right Side
- Temperature Valve Actuator Replacement - Left Side
- Auxiliary Temperature Valve Actuator Replacement (Behr)
- Auxiliary Temperature Valve Actuator Replacement (Delphi)
- Auxiliary Mode Valve Actuator Replacement (Behr)
- Auxiliary Mode Valve Actuator Replacement (Delphi)
- Air Temperature Sensor Replacement - Upper Auxiliary (Behr)
- Duct Air Temperature Sensor Replacement - Upper Right Side
- Duct Air Temperature Sensor Replacement - Upper Left Side
- Air Temperature Sensor Replacement - Lower Auxiliary (Delphi)
- Duct Air Temperature Sensor Replacement - Lower Left Side
- Duct Air Temperature Sensor Replacement - Lower Right Side
- Ambient Air Temperature Sensor Replacement
- Inside Air Temperature Sensor Replacement
- Auxiliary Inside Air Temperature Sensor Assembly Replacement
- Sun Load Sensor Replacement
- Description and Operation
- Air Delivery Description and Operation
- Notes
- HVAC Control Components
- HVAC Control Module
- Auxiliary HVAC Control Module (without RSA)
- Auxiliary HVAC Control Module (with RSA)
- Auxiliary HVAC Control Functions
- Mode Actuator
- Auxiliary Mode Actuator
- Blower Motor Control Processor
- Auxiliary Blower Motor Control Processor
- Air Speed - Front Control
- Air Speed - Auxiliary
- Air Distribution
- Front Defrost
- Air Distribution - Auxiliary Control
- Recirculation Operation
- Automatic Operation
- Remote Start
- Heater Core Coolant Pump
- Air Temperature Description and Operation
- Air Delivery 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.