Conditions for Clearing the DTC

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. 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.