That sounds like warped rotors. Google it you will see it common on these cars.
I have a 2007 LT, 3.9v6. It was sold as certified and had 26,000 miles when I noticed the brakes pulsating downhill. Also does it when stabbing them sharply from a high speed (ie emergency braking on highway, scary how bad it shakes!)
Customer care said to downgear instead! Dealer refuses to fix, says it's maintenance item and they never have seen another impala with the problem.
26,000 miles is way too early to need brake rotors replaced.
Please call Chevrolet customer care and log a complaint. 1-800-222-1020.
They dont seem to do anything, but the more public we make this, the sooner they fess up to shotty parts!
Thursday, October 2nd, 2008 AT 11:00 PM