Conditions for Clearing the DTC

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

For DTC C0277 the ignition must be cycled before the code can be cleared.
A history DTC will clear once 50 malfunction-free ignition cycles have occurred.
A DTC will not clear the current status until the next ignition cycle.