We bought our 1st Grand Prix back in 2007. Its an 04 GT with the 3.8,leather heated seats,sunroof and most of the other bells and whistles. Its dark green with just under 101,000 miles. The only things we have done besides normal stuff like tires and battery are replace the right rear hub, i new window motor and new coolant bypass tubes on the engine. Also did the water pump( although it was not leaking)and temp. sensor.
Hopefully i can be of some help on here and learn more about our car too. We are new owners of an 09 G6 and previously owned a 98 Grand Am GT.