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 943 (ACTIVE NOISE CANCELLATION 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 does not describe the selected car, but rather 8 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC CODE INDEX
| DTC | Description |
|---|---|
| DTC B0560 | DTC B0560 08 Tachometer Circuit Signal Invalid |
| DTC B1277, B127C, or B127D | DTC B1277 01 Microphone 1 (LF) Input Signal Circuit Short to Battery DTC B1277 02 Microphone 1 (LF) Input Signal Circuit Short to Ground DTC B1277 04 Microphone 1 (LF) Input Signal Circuit Open DTC B1277 1A Microphone 1 (LF) Input Signal Circuit Bias Level Out of Range DTC B127C 01 Microphone 2 (RF) Input Signal Circuit Short to Battery DTC B127C 02 Microphone 2 (RF) Input Signal Circuit Short to Ground DTC B127C 04 Microphone 2 (RF) Input Signal Circuit Open DTC B127C 1A Microphone 2 (RF) Input Signal Circuit Bias Level Out of Range DTC B127D 01 Microphone 3 (RR) Input Signal Circuit Short to Battery DTC B127D 02 Microphone 3 (RR) Input Signal Circuit Short to Ground DTC B127D 04 Microphone 3 (RR) Input Signal Circuit Open DTC B127D 1A Microphone 3 (RR) Input Signal Circuit Bias Level Out of Range |
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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.