Would I need to change my rim/tire size with a 2.5" leveling kit?
No, you can keep the size you have, a leveling kit is just that, your leveling out your rig, nothing more. Most people put larger tire and rims on cause they want too but it is not required.
if nothing is worn out...
Search Chevrolet Silverado 1500 Questions
Chevrolet Silverado 1500 Experts
Related Models For Sale
Used Cars For Sale