Rear Suspension problems of the 2005 Chevrolet Cobalt

12/26/05 at 3:30 p. M. On interstate I-495/wilmington, DE bypass. Road straight with no debris and dry. Heading southbound in the far left lane of a three lane divided road. Gaurdrails on both sides. Doing 65 mph/speed limit. Center lane was a walmart semi tractor trailer doing 62 mph. In front of my lane near the front of the truck were two cars about 5 car lengths ahead. My car jerked radically to the right and then back to the left twice in rapid succession. The car then jerked violently to the right and the left front of the car impacted the back bumper of the truck. The truck driver felt a bump and started to brake. My car rotated clockwise until I was going down the road backwards about 50-55 mph in the first lane alongside the stopping truck. The car pulled again to the right and the rear of my car impacted the guardrail. The rear window exploded and I felt cold air. The car rotated again, this time counter-clockwise until I was going down the road backwards again. Speed was about 30-35 mph at this time. The car again pulled to the right and there was no guardrail. My car came to a stop in the green strip in the center of the interstate at about a 45 degree angle facing southbound. The driver's side door was damaged and I had to force it open to exit the vehicle. It was then that I discovered the left rear tire had come off the vehicle and was about 50 feet away on the inside shoulder of the road. All four lug nuts were still on the tire and it was still inflated. The delaware state police responded and filed a report. The insurance adjuster took pictures of the car at the towing facility yard and the damage was noted. There was damage to the front side of the car and the rear. The right side of the car was basically intact. Left side of car was completely destroyed. The left rear wheel assembly was completely destroyed including the brake drum, shock, spring, axle, housing and all rods and connections. The car was a total loss.