A blind spot detection system for a primary vehicle. The system includes rear primary vehicle sensors configured to be mounted at a rear of the primary vehicle to detect a secondary vehicle present in a blind spot of the primary vehicle. Side view mirror primary vehicle sensors are configured to be mounted to side view mirrors of the primary vehicle to detect a secondary vehicle present in the blind spot of the primary vehicle. A control module is configured to: detect a trailer connected to the primary vehicle; activate the rear primary vehicle sensors and not activate the side view mirror primary vehicle sensors when the trailer is not connected to the primary vehicle; and not activate the rear primary vehicle sensors and activate the side view mirror primary vehicle sensors when the trailer is connected to the primary vehicle.