Dubspeed Driven has some great, undisguised photos of the upcoming Silverado.
Surprises include more differentiation from the Tahoe than expected and, at least in this Z71, somewhat ungainly styling. I, for one, will wait to see it in person to judge for sure.
Take a look at larger shots, etc at:
Dubspeed Driven - 2008 Chevy Silverado Uncovered