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 1342 (POWER STEERING SYSTEM)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 2008 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC CODE INDEX
| DTC | Description |
|---|---|
| DTC C0176 | C0176 54: System Thermal Error Temperature High |
| DTC C0450 | C0450 00: Steering Assist Control Solenoid/Motor/Actuator Circuit |
| DTC C0475 | C0475 00: Electric Steering Motor Circuit C0475 08: Electric Steering Motor Circuit Signal Invalid |
| DTC C047A | C047A 08: Electric Steering Motor Position Sensor Circuit Signal Invalid |
| DTC C0561 | C0561 71: System Disabled Information Stored Invalid Serial Data Received |
| DTC C056D | C056D 39: ECU Hardware Performance Internal Electronic Failure |
| DTC C056E | C056E 4B: ECU Software Performance Calibration Not Learned |
| DTC C0800 | C0800 03: Device Power 1 Circuit Voltage Below Threshold C0800 07: Device Power 1 Circuit Voltage Above Threshold |
| DTC C0845 | C0845 03: Device Ignition 1 Circuit Voltage Below Threshold |
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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.