i have a 06 g6 gt, ive noticed lately when i pull into a drive way, or go over a speed bump that the front left side of the car makes a thumpping sound. i jacked up the car to inspect the shocks and sway bar but i have not noticed anything unusual. my next step is to lube the suspension and see if that helps. any ideas?? :confused:

Have you installed larger rims that could be bottoming out???