So I'm not sure if this is something I'll have to ask the dealer I bought my truck from, but I have my eyes on the Rough Country 2.5 inch leveling kit for my 2013 Silverado 2WD extended cab. Will me installing this myself void any warranty I have? I bought the truck used last week and it still has the factory warranty on the truck. Also, is there a major difference or benefit/disadvantage between the Rough Country 2 inch and 2.5 inch leveling kits other than tire size? Thanks!