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 C056D 33
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ECU Hardware Performance Special Memory Failure
- DTC C056D 34
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ECU Hardware Performance RAM Failure
- DTC C056D 35
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ECU Hardware Performance ROM Failure
- DTC C056D 36
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ECU Hardware Performance EEPROM Failure
- DTC C056D 39
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ECU Hardware Performance Internal Electronic Failure
- DTC C056E 41
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ECU Software Performance Operational Software/Calibration Set Not Programmed