This disclosure generally relates to a vehicle blind spot detection system, method, and module for adjusting parameters of a vehicle blind spot detection algorithm based on a trailer being attached to the back of the vehicle. More specifically, based on a determination that a trailer is attached to the vehicle and the reception of trailer information corresponding to the attached trailer, an adjust to the parameters of a blind spot detection area is disclosed for ensuring the continued operation of the blind spot detection feature will take into account the attached trailer.