GM has filed a trademark application for Cheyenne.
There are two recent instances where GM has used it. Its the model name of the upper trim Silverado in Mexico, and a performance oriented Silverado concept from a few years back.
The concept was a regular cab short bed with the 6.2, carbon ceramic brakes from the Z/28, and several other performance upgrades. Wonder if we'll see something similar (and probably toned down) for production?