Saw this ads recently, http://www.autosite.com/Previews/2005-pontiac-g6.asp
Where does GrandPrix fit with this G6? GM refined 3.8L to 3.9L engine?
2005 G6 2+2 coupe with available including a 2.4-liter DOHC Ecotec
four-cylinder engine producing 170 horsepower ; 3.5L OHV V6 making 200
horsepower and featuring electronic throttle control and last with a
high-output, 3.9-liter V6 making 240 horsepower through variable valve
timing 245 lb.-ft. of torque at 3,200 rpm.