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 G3500, VAN PASSENGER EXTENDEDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 182 (HVAC SYSTEM - AUTOMATIC)DIAGNOSTIC INFORMATION AND PROCEDURESDIAGNOSTIC CODE INDEX
2008 Chevrolet Chevy Express G3500, Van Passenger Extended
Diagnostic Code Index
2008 Chevrolet Chevy Express G3500, Van Passenger ExtendedSECTION Diagnostic Code Index
WARNING: This page is about a different car, the 2008 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC CODE INDEX
| DTC | Description |
|---|---|
| DTC B0158 or B0163 | B0158 03: Outside Air Temperature Sensor Voltage Below Threshold B0158 07: Outside Air Temperature Sensor Voltage Above Threshold B0163 06: Passenger Compartment Temp Sensor Circuit Short to Ground or Open |
| DTC B0183 or B0188 | B0183 06: Solar Load Sensor 1 Circuit Short to Ground or Open B0188 06: Solar Load Sensor 2 Circuit Short to Ground or Open |
| DTC B0248, B0268, B0408, B0413, B0418, B0423, B0428, B0433, B3531, B3761, B3773, or B3782 | B0248 61: Air Flow Control 3 Circuit Actuator Stuck B0268 61: Air Flow Control 7 Circuit Actuator Stuck B0408 61: Temperature Control 1 Circuit Actuator Stuck B0413 00: Temperature Control 1 Feedback Circuit B0418 61: Temperature Control 2 Circuit Actuator Stuck B0428 61: Temperature Control 3 Circuit Actuator Stuck B0423 06: Temperature Control 2 Feedback Circuit B0433 00: Temperature Control 3 Feedback Circuit B3531 61: Air Flow Control 10 Circuit Actuator Stuck B3761 00: Air Flow Control 3 Feedback Circuit B3773 00: Air Flow Control 7 Feedback Circuit B3781 00: Air Flow Control 10 Feedback Circuit |
| DTC B2496 or B3843 | B3843 02: Outside Air Quality Sensor 2 Circuit Short to Ground B2496 02: Outside Air Quality Sensor 1 Circuit Short to Ground |
| DTC B3933 | B3933 06: Evaporator Air Temperature Sensor short to ground or open |
| DTC P0531, P0532, or P0533 | P0531: Air Conditioning (A/C) Refrigerant Pressure Sensor Circuit P0532: Air Conditioning (A/C) Refrigerant Pressure Sensor Circuit Low Voltage P0533: Air Conditioning (A/C) Refrigerant Pressure Sensor Circuit High Voltage |
| DTC P0645, P0646, or P0647 | P0645: Air Conditioning (A/C) Clutch Relay Control Circuit 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
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.