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 MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1614 (HVAC SYSTEM - AUTOMATIC)DIAGNOSTIC INFORMATION AND PROCEDURESDIAGNOSTIC CODE INDEX
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6
Diagnostic Code Index
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Diagnostic Code Index
WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC CODE INDEX
| DTC | Description |
|---|---|
| DTC B0158, B0163, B0173, B0178, B0509, or B0514 | B0158 05: Outside Air Temperature Sensor Circuit Short to Battery or Open B0158 02: Outside Air Temperature Sensor Circuit Short to Ground B0163 05: Passenger Compartment Temp Sensor 1 Circuit Short to Battery or Open B0163 02: Passenger Compartment Temp Sensor 1 Circuit Short to Ground B0173 05: Output Air Temperature Sensor 1 Circuit Short to Battery or Open B0173 02: Output Air Temperature Sensor 1 Circuit Short to Ground B0178 05: Output Air Temperature Sensor 2 Circuit Short to Battery or Open B0178 02: Output Air Temperature Sensor 2 Circuit Short to Ground B0509 05: Output Air Temperature Sensor 3 Circuit Short to Battery or Open B0509 02: Output Air Temperature Sensor 3 Circuit Short to Ground B0514 05: Output Air Temperature Sensor 4 Circuit Short to Battery or Open B0514 02: Output Air Temperature Sensor 4 Circuit Short to Ground |
| DTC B0183 or B0188 | B0183 02: Solar Load Sensor 1 Circuit Short to Ground B0183 05: Solar Load Sensor 1 Circuit Short to Battery or Open B0188 02: Solar Load Sensor 2 Circuit Short to Ground B0188 05: Solar Load Sensor 2 Circuit Short to Battery or Open |
| DTC B0228, B0413, B0423, or B3779 | B0228 02: Recirculate Position Feedback Circuit Short to Ground B0228 05: Recirculate Position Feedback Circuit Short to Battery or Open B0228 61: Recirculate Position Circuit Actuator Stuck B0413 02: Temperature Control 1 Feedback Circuit Short to Ground B0413 05: Temperature Control 1 Feedback Circuit Short to Battery or Open B0413 61: Temperature Control 1 Feedback Circuit Actuator Stuck Open B0423 02: Temperature Control 2 Feedback Circuit Short to Ground B0423 05: Temperature Control 2 Feedback Circuit Short to Battery or Open B0423 61: Temperature Control 2 Circuit Actuator Stuck B3779 02: Air Flow Control 9 Feedback Circuit Short to Ground B3779 05: Air Flow Control 9 Feedback Circuit Short to Battery or Open B3779 61: Air Flow Control 9 Circuit Actuator Stuck |
| DTC B1023 | B1023 05: Integral Switch Performance Short to Ground B1023 06: Integral Switch Performance Short to Battery or Open B1023 61: Integral Switch Performance Signal Invalid |
| DTC P0532 or P0533 | P0532: Air Conditioning A/C Refrigerant Pressure Sensor Circuit Low Voltage P0533: Air Conditioning A/C Refrigerant Pressure Sensor Circuit High Voltage |
| DTC P0645 | P0645: A/C Clutch Relay Control Circuit |
| DTC P0646 or P0647 | P0646: Air Conditioning (A/C) Clutch Relay Control Circuit Low Voltage P0647: Air Conditioning (A/C) Clutch Relay Control Circuit High Voltage |
RENDER: 1.0x
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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.