I'm about to bring mine in for the same issues. Was your noise a clunk from the front drivers side when going over bumps and stuff? I figured it was a loose sway bar end link or tie-rod end, it started once I put about 3K miles on the car and has only gotten worse.
The dealer is gonna hate me this next trip, I need the charge pipe mount, the sway bar link, my rear rotors and pads re-done AGAIN (that will make twice in 5K miles) and my passenger side window is rattling like ******* crazy in any position on the track. Not to mention my two oil leaks. Boo.
2009 Sport Red SS
It's just a Cobalt.