Rotors were badly rusted before car had 30000 miles on it causing poor braking and extreme vibration of car while driving. Needed to replace all rotors and brakes at 30000 mile check up. Learned that GM has had a problem with rusty rotors due to elimination of chromium in the iron alloys during manufacturing of rotors. Very costly 30000 mile check up and GM and dealer refuses to accept responsibility for problem rather they say its "environmental". did not have accident but did have problem braking a high speeds. Since this is original equipment I feel GM should take responsibility for defective substandard equipment.

- Minneapolis, MN, USA

Consumer states that brake rotors are wearing. When applying the brakes, the vehicle will have a heavy vibration and extended stopping distance. Dealer notified.

- Pittsburgh, PA, USA

Brake rotors are wearing out and when applied vehicle will have a heavy vibration and extended stopping distance. Dealer notified.

- Washington, DC, USA

The rear rotors were hanging up, make noise, pulsate, and the front end of the vehicle vibrates. The consumer states that the front end vibrates, the door assembly is misaligned, sticks out, and noisy, the tire was changed but failed balance and theres a vibration, the engine stumbles/stalls, the interior cloth by the top of the windshield is loose-3 times, can hear a moan coming from the windshield, the onstar antenna fell apart, the torsion rod vibrates, the steering shudders at slow speeds and on turns and the hose/bulletin # 99-02-32-007A, power steering, and hydraulics have been replaced-8 times, the A/C blows hot air/bulletin #990139-004A, and the vehicle pops/bangs when going over bumps and making turns, theres a rattle noise from under vehicle/possible exhaust or air pump-cause: Intermediate exhaust pipe rattling (internal) front exhaust manifold to oxidation catalytic converter-replaced, wheel alignment (pulls to the left), there was a rattle noise from the left side of the pillar molding/removed the A-pillar trim and insulated/align/against upper dash, and getting poor fuel economy/idle air control-reppaced.

- Sun City, AZ, USA