The wheel/tire combo makes a statement, both about the owner and what he thinks/wants the truck to come off as.
15" wheels & 33" tires with a 4" lift has a very classic/beefy look IMO.
Anything past that and your getting into either bling or redneck territory.
Chevyman63, what'd ya mean "if"?
Yeah, GM deffinetly needs to jump in on this road trip!