Thread: Unresponsive 3.8 Liter Acceleration and Strange Sound at 4500RPM

I'm not extremely mechanically inclined, but I don't mind getting my hands dirty for
DIY kinds of repairs. I was wondering if I bought a new cat, would I be able to unbolt
it from the bottom of the car, and replace it, or is there flamework/cutting/soldering
involved? Thanks

I would also say clogged cat. My car is also a 02 gt and had very similar problems. Once I replaced the cat, all problems went away and the car ran like new.
MY suggestion to you is to buy this MagnaFlow 23405 - Direct Fit Catalytic Converter | O'Reilly Auto Parts

I believe advanced auto sells them too, not positive though.
Not only are you replacing the bad cat but your replacing it with a higher flowing cat, AND deleting the U-bend (the most restrictive part of the exhaust on these cars). All for about 200 bucks. No welding involved simply soak the sh*t outta the old exhaust bolts with PB blaster and remove the bolts and replace with new cat.

PS. The cat's on these cars are so notorious for going bad GM actually recalled the cat's on them. Mine was within the VIN range but was over 120k miles or 10years, whichever comes first. Mine took a crap at 126k (go figure). Personally though, instead of trying to d*ck around with the dealership, go the magnaflow route. Your car will sound a little better, run ALOT better and even get a few ponies outta it.

Hope this helps.....