I just stumbled across this but I live in Tell City IN, and everyone here goes to Bruce's Muffler in Lewisport KY. I have had zero problems with both of my previous trucks done there and no one in my personal family has had any issues either.
Its been 8 years since I had my old Silverado done there...but I will be taking my new AV there soon.
520 4th St, Lewisport, KY
(270) 295-3262
Hope this helps.