New Rear Suspension Rods
My '08 SS (36,000 miles) had sloppy rear suspension (bad handling) & severe rear tire wear. I complained to the selling dealer & they replaced the rear suspension rods, tires, and did an alignment all under warranty (I had to pay for 1 tire as part of a "good will" deal) & now the car drives great. I have read that the rear suspension is weak on these cars. If your car is under warranty, complain to the dealer & get it fixed. If your car is out of warranty, check out
http://www.bmrfabrication.com/W-Body.htm They sell heavy duty rear suspension that is far superior to stock. I attached a scan of my receipt. Print it and take it to the dealer in case they give you any BS.
Go to my garage & save the image of the warranty repair receipt & print it out.