problems problems and more problems

my aunt bought a 2002 supersport, its got 31,000+
miles on it. everytime she starts it it puffs blue
smoke. then it wouldnt pull steep grades over 35mph
when i used to 65-70 mph. come to find out the
cat was clogged up. its had 6 sets of front rotors.
the monsoon amp started smoking. and she was riding
down the road and the passenger side seat started
going back and forth, like some one was pushing the
button to move the seat up and back. she is scared
to drive it any more and the dealer is trying to
say she's been in to many times with the car
to fix it under warranty. has any one else
experianced these issues, let me know.

Unless she has exceeded the factory warranty, or is causing these issues (which it sounds like she isn't) the dealer must honor the warranty. You can take it to any other Gm dealer to have it fixed if you don't feel like dealing with those idiots. Dealers don't like to do warranty work because Gm gives them less money for it. Sorry to hear your aunt seems to have caught a lemon.