Automatic Stability Control (asc) problems of the 2006 Chevrolet Uplander

Our 2006 chevy Uplander first starting having problems at about 20,000 miles when our tires (continental brand that came installed on brand new vehicle from dealer) needed to be replaced due to severe cupping on all 4 tires. We were told it was an alignment issue, so we had the tires replaced and had a 4 wheel alignment. Tires needed to be replaced again at 45,000 miles due to same cupping issue. Again, another 4 wheel alignment was performed. Fuel sensor was reading empty on a full tank of gas and the float was replaced at 16,000 miles. Now at 50,000 miles, sensor reads consistently empty again on a full tank of gas. Severe rattling/vibration from under the vehicle at highway speeds that resonates from between the front driver and passenger seats. (possibly e-brake cable or heat shield?) both front and rear shocks and struts needed to be replaced at 54,000 miles. There is a severe issue concerning the steering. When turning either left or right steering has some slop. The rack and pinion need to be replaced. The electronic stability control sensor, abs sensor, and traction control sensor all illuminate at random times while normal driving is occurring.