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 642 (POWER STEERING SYSTEM)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 2010 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 01: Steering Assist Control Solenoid Circuit Short to Battery C0450 02: Steering Assist Control Solenoid Circuit Short to Ground C0450 04: Steering Assist Control Solenoid Circuit Open Circuit C0450 0B: Steering Assist Control Solenoid Circuit Current Above Threshold C0450 54: Steering Assist Control Solenoid Circuit Temperature High |
| 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 |
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.