Tire Rack has many rims and tires for trucks. Check out some of my favorite truck rims and tires to go with them.
Check out the MAMBA M4 rims on the white Chevy Silverado. This rim is a nice fit for the Silverado. They seem to shorten the look of the truck while making it appear to be taller as the fit is a little more aggressive than the stock fitment. Makes you want to look twice.
Some other favorites follow:
ATX Chamber DC-1 Granite Alloy GA9
A few truck tires I like:
A/T REVO 2 LTX A/T2 BFG T/A KO DuraTrac Crusher MT/R
See which ones fit your truck.