Vsa Warning Light On problems of the 2005 Buick Terraza

Bought a 2005 Buick terreza in sept. 2009 39,500 mi. Approximately 31 days after purchase stability control sensor on drivers side front went bad. Making the whole front end lock up. Galpin Ford who we bought Buick from paid for lamb Chevrolet to fix the sensor Buick had 42,000. On it when went out. 30 days later same incident happened my front end locked up and on dash said stability control active stabilize stability system took back to lamb Chevrolet and at that time they said wiring was faulty making sensor go out again so they rewired the Buick this time plus replaced sensor for 2nd time. 7 months later once again front end locksup and same msg. Stability system active take back to lamb Chevrolet and same sensor for 3rd time has went bad they cant figure out why. This is a major safety issue and even if I was to pay to get fixed again its quite obvious it will go out again. It just a matter of when will it go out. While im driving down road going 65 with my 4 children thinking vehicle is repaired again and all sudden front end locks this vehicle will eventually end up killing myself or a passenger or innocent bystander. I have receipts for all repairs maintenance done on 1st complaint found online: I have had for the past seven months far outweigh the good. Neither Buick nor the dealer will do anything to compensate me for my loss of security in this vehicle. It the last and biggest problem was while driving on a major highway on a crowded Saturday afternoon, the steering completely locked up, the traction control light and service stability system lights came on, I had no ability to steer, use the gas or brake, the van kept swerving from side to side 2nd complaint: is it ok to drive our 2005 Buick Terraza with the service stability system, abs and traction control light on? we are planning to drive ~ 1600miles on vacation. Is it safe to drive the van with the service stability system, abs brakes and traction control system message on computer?.