5 times in shop, keep mentioning my AC isn't working right and a smell and a film on my windows. The smell is making my passengers sick. They have deodorized, ionized, and changed cabin filters, and the smell comes back as soon as I turn on HVAC system. My antifreeze is also low. Instead of looking at the possibility of the antifreeze going into passenger compartments, the dealerships keep refilling AC and masking the smell. Public health, poison control seem to think my passengers and I are getting Ethenol glycol poisoning enough I can't drive the car for an hour without getting sick. Mention this to GM and they told me they aren't going to help me and to suck it up