Both trailing arms in the rear suspension have failed to due to rust. The failure of at least one of the two trailing arms occurred when traveling across a bump in the road at low speed while on a long distance trip. The 2007 Buick Rainier had a history of being in Pennsylvania. The use of salt during the winter months was the likely cause of the failures. The failing of the trailing arms resulted in considerable vibrations at low speeds up to ~40 mph. The failing of the trailing arms could have resulted in the lost of replacement springs if a significant bump had been hit while driving. Note: Replacement springs are often necessary after the failure of the air bag springs, as was the case for this vehicle. Fortunitly, the vehicle was repaired before any accident occurred.

- Manakin Sabot, VA, USA

Around January 2016, the rear end was basically sitting almost on the rear tires--the air bags would not pump the rear end up. After a couple of days, it was fine. Then around March 2016, same thing happened. In June 2016, same thing happened but only down for about a day. The fourth time this happened was the other day, August 18, 2016--today is August 21, 2106 but they have not corrected. I have read over 100 threads of people having this issue and cannot understand why this problem has not been recalled--it seems to affect the Rainier and Envoy and trailblazers, among the ones I've read. Why shouldn't GM have to fix this issue? I understand there is a conversion you can do, but that will cost about $400+ to do that--right now we don't know if it's the bags or the pump, but the pump seems to work, just nothing happens. We noticed this when the vehicle was stationary, but it stayed the same in motion--very dangerous--the top of the body started scraping the wheel today while driving and it really has scared me.

- Delco, NC, USA

The contact owns a 2007 Buick Rainier. The contact stated while driving approximately 30 mph, the wheels suddenly locked with the 'stability control" warning light illuminated. The failure would recur multiple times. The vehicle was taken to the dealer for diagnosis where they stated that a switch of some type that was under the driver's seat had become damaged. The vehicle was repaired but the failure persisted. The vehicle was taken back to the dealer for diagnosis where they stated that the sensor on the front axles caused the failure. The vehicle was not repaired. The manufacturer was notified of the failure and the approximate failure mileage was 127,000.

- Greer, SC, USA