Brake rotor failure after a little over 40,000 miles my brakes started pulsating and I had, at best, 60% of the normal braking power. Braking is so poor that ABS won't activate even with full braking action. I removed the pads and rotors only to find that the rotors were disintegrating. Apparently, on many models including the 2000 Bravada such as mine, GM is using a bi-metal rotor. After 30,000 miles of braking the heat will eventually cause separation of the two metals and flaking of the surface of the rotor along with abnormal rusting and pitting on the rotor surface. I have read several reviews posted on edmunds.com stating the same problem. GM customer service denies any problem as well as any other complaints and is unwilling to fix it.

- Sunbury, OH, USA

Vehicle had bad pulsation in brake pedal and whole vehicle vibrated when braking, dealer said front rotors were warped, replaced front rotors w/ 46,900 mi, still had small vibration and w/in 2 weeks pulsation started again and continued to get worse, took to another mechanic who said front rotors were warped again, back rotors are literally disintegrating. I have 132,000mi on my Nissan and have never had warped rotors or had rotors replaced so I know it's not my driving.

- Omaha, NE, USA

Front right tire separated from the vehicle while in motion. Two weeks ago brakes and rotors were changed. Mechanic stated there was a defect with the lugs: Nuts.

- Oakhurst, NJ, USA