Just to let everyone know, I have a 2005 Cobalt LS with the sports apper. package, 16 in' rims Michelin Energy Tires. My car was pulling to the left at 100-120km and often at 60km aswell. I went in to the dealer and they said the alignment was fine. Turned out I had a defecive front left tire. I only have 10k on my car. They replaced the tire but i'm not happy that they only replace only one and not two tires. Now I have one tire with zero km and 3 with 10000k. GM fucked me on this...