While installing a new Dynomax S/S cat back exhaust system on my 1999 Suburban K1500 I noticed that the big heat shield running from the muffler past the cats had rusted through in quite a few places. I was surprised to see that it seemed to be welded to the underbody and was not replaceable. Anyone have experience with this situation? If so, what was your remedy?

While installing a new Dynomax S/S cat back exhaust system on my 1999 Suburban K1500 I noticed that the big heat shield running from the muffler past the cats had rusted through in quite a few places. I was surprised to see that it seemed to be welded to the underbody and was not replaceable. Anyone have experience with this situation? If so, what was your remedy?

I would get a piece of heavy galvanized sheet metal and form into the same shape ,,then rivet the metal to carbody using 3/16in s/steel rivets...coat the rivets/underbody, with a mineral based undercoating..

I made one out of diamond plate but that was over kill...

this is not uncommon up in our rust belt after 10 years..

chinese stainless !


grind off old metal shield..