The major ones are the waterpump (WP) and the airbag. Also there is a recall on the rear end for the relief tube. Make sure the rear axle isn't leaking as they are very expensive to replace and very hard to find. The WP can be about $1000 to replace at the dealer. Does the car have a "tune"? If it has the GMPP tune, it will have different MAP sensors. Look at the driver's side IC piping. If the sensor in the tube has 1 screw/bolt, then it has the 3.0bar MAP sensor so you would have a tune. If it doesn't, it doesn't necessarily mean that you don't have a tune. A tune is the cheapest way to gain a bunch of extra HP in this car.
Solo Street Race exhaust
ASAP T2 stripes and badging
Windrestrictor V2 lighted in white
Windrestrictor lighted door sills lighted in white
DDM Works IC Piping
Undercar LEDs in white to match Windrestrictor
ZZPerformance dyno tuned - 286HP, 317ft/lbs of torque at 23psi of boost.