I know there is a gov't mandated emission warranty period. Anyone know what that is for MY2001? I could call a dealership but I don't trust them, they may say I'm past it and hope I go away. On internet sites some say 50k, 88k, and 100k miles I keep getting code P0420. I think the cat is toast. ~ 86-88k miles on a 2001 GTP. I thought it was 100k but can't find a definitive source. Nothing on pontiac site.