Steering Column problems of the 2016 Ford F-250

Has a hissing sound under the passenger side ,has been giving us upset stomachs and sometimes head aches,just plain sick feeling, when the ac and defrost are on. Also from end abs seems to engage when going around a bend and then supposedly the auto correct kicks in and tries to correct the truck pulling steering wheel. Was told they tested one truck and it did it one time,this is after they put in countless hrs on labor plus a $1000 into a new steering column and determined that it is normal operating condition. Didn't buy it for this god for sake noise . As for the hissing,told me to detail the truck and that they were not going to do anymore for this. This has been going on since the first week of buying this truck. Over and over to the dealership,they keep putting new parts on. If this is normal operating conditions,than why don't they know what to replace and keep putting more test and parts. No answer on the hissing sound and very very rude managers at dealership.