Good luck hunting. I didn't know Buick made TT and SC GN's!?!
1/4 mi. drag strips don't have any turns...who needs good cornering abilities!
All jokes aside, they're probably not the best car cornering. There are a good amount of aftermarket suspension upgrades that would help out though. I've owned both a GN and TTA, and the GN wasn't nearly as good with suspension/cornering, etc.. as my TTA.