Hey Scotty, long time fan here, have few questions.
My 2001 Cadillac Catera has 80,000 miles on it.
Having heat problem, my vents blow out cold air, brought it to a mechanic, couldn't fix it. Took it to another mechanic, couldn't fix, said he cant find the problem. Otherwise, car runs perfectly fine.
Antifreeze full, radiator good, hoses run hot. I'm thinking its either electronic or blocked vent.
Also noticed wet passenger side carpet recently.