I bought my 07 g6 2 weeks ago. I went to leave my friends bands' show and the ignition won't turn. the steering wheel moves but the gear shift is stuck too. a mechanic said the new keys make the tumbler stripped and it stops working. I literally just had it towed- and it better be covered under warranty b/c it is no faulty b/c of me I am very agitated at this.
If that's all you ever have to worry about with this car (pain in the rear, though it may be...) I would say that's pretty minor. This "mechanic's" definition sounds a little dicey to me. You sure nobody's tried to start it with a butterknife, etc.?? ;-)