SWR and antenna questions.

So I posted just a few short days ago about my wife getting me a new radio for my birthday. Hooked it up in the truck and started going through the motions to get it ready to use and my built in SWR meter is showing 6.0-6.3 and to my super inexperienced self, that seems pretty high. Is this something I can tune out with a better antenna? My current antenna is a factory one from freightliner and does not have a tuneable tip.