So I have owned this great CTS-V since January and it's been a lot of fun. But like most of us have discovered. The way we drive these cars sometimes has it's consequences. Mine are not that bad because so far it has all been covered under warranty. After 3 months of some spirited driving, my water pump started to fail and needed to be replaced. NOW.. after a lot more of that uber spirited driving , my radiator is leaking. Nice of GM to say they cover it. Sorry for the ranting.. Just needed to vent. Have not had any of the famous diff issues. "knock on wood".