Side/window Air Bag problems of the 1997 Chevrolet Venture

My 19 yr old son lost ablity to steer the van after leaving the parking lot, after a soccer game. The car would not steer left and was hard to maintain driving straight with any type of control. The van was taken to the dealers the next day. The dealer test drove the van and confimn the lost of steering. I am under the impression from the dealer that all the steering unit need to be replaced . Also the dealer reported that the driver side air bag coil broke when the steering went out and could have caused unexpected deployment of the driver side air bag. Steering was repaired under extented warrenty. Repair to driver side air bag coil was not under warrenty and paid for by customer. All repair have been completed.