its not ''gm cars'' its ''fbodies specific'' only other vehicles allowed would be a 5th gen camaro and a ''co-ordinator'' driven chase/multimedia vehicle.
that doesnt mean bring out the Grand Prix or the Caprice or Monte Carlo....it means Camaro/Firebird/Tojan.
still waiting on field ops to find the corvette paperwork....got hooked up with them through dave of kerbeck corvette. awesome people.