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 MANUALSCHEVROLET2006CHEVY EXPRESS G2500, VAN CARGO, 6.6 2REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1370 (HVAC SYSTEM - AUTOMATIC)DIAGNOSTIC INFORMATION AND PROCEDURESDIAGNOSTIC CODE INDEX
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2
Diagnostic Code Index
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2SECTION Diagnostic Code Index
WARNING: This page is about a different car, the 2008 Cadillac CTS. 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 Thershold B0158 07: Outside Air Temperature Sensor Voltage Above Thershold 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, B3761, or B3773 | 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 06: Temperature Control 1 Feedback Circuit Short to Ground or Open B0418 61: Temperature Control 2 Circuit Actuator Stuck B0423 06: Temperature Control 2 Feedback Circuit Short to Ground or Open B3761 06: Air Flow Control 3 Feedback Circuit Short to Ground or Open B3773 06: Air Flow Control 7 Feedback Circuit Short to Ground or Open |
| DTC B3933 | B3933 06: Evaporator Air Temperature Sensor short to ground or open |
| DTC P0532 or P0533 | P0532: Air Conditioning (A/C) Refrigerant Pressure Sensor Circuit P0533: Air Conditioning (A/C) Refrigerant Pressure Sensor Circuit Low 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 |
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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.