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 1616 (DATA COMMUNICATION SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC U0073 OR U2100DTC DESCRIPTOR
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6
DTC Descriptor
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION DTC Descriptor
WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- DTC U0073 00
-
Control Module Communication Bus Off
- DTC U0073 71
-
ECU HS Bus Off
- DTC U0073 72
-
ECU LS Bus Off
- DTC U2100 00
-
Controller Area Network (CAN) Bus Communication
- DTC U2100 47
-
Controller Area Network (CAN) Bus Communication
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.