- Buick Ownership
2017 Verano, 30K miles. The AC air is starting to smell badly. Worst when first starting AC. I took to dealer and was told the HVAC after blow just need to be activated. This feature will keep the blower on to dry out AC evaporator moisture while the car in off state. This problem is address per bulletin # 00-00-89-027J in SI regarding microbial growth causing odor.