I just read the thread and I have the same situation; my 98 GC's muffler is starting to sound loud. I was going to ask who does one turn to if not the chain stores? Walking in the front door, I have no clue as to the quality of the shop-chain or private. Looking at the pipe going into the muffler, it darn well looks lie a weldment. And it is the muffler that is going at the rear seam. I know that yeas ago, I took my 89 Caravan to the big M-chain and those guys were below he term grease monkey so I am leery everytime I need work and have been going to the dealership for everything from oil changes on up.