No surprise here: Professional racer and retired GM engineer, John Heinricy posted the day's fastest lap at 2:46:560.

This knowledge is useful mostly for getting an intent of how fast a CTS-V is capable of running here at Monticello. Do not, however, compare that lap time (nor that of the other GM ringer), to the laps posted by the privately owned BMWs, Jag and Audi. Those were more-or-less average guys that happen to own fast cars, not professional drivers.