Thanks!! Already been through the ringer on this truck, it is 17 year old kids truck and just trying to help him out. Just had it's ignition module replaced, do to not starting, now this, which looks like over $300 just for the cats now. Hope that this is something I can do myself, rather than paying a shop, but I guess that depends on if it is welded on or bolted.
Time to crawl under this thing and see.