Purchased new 2020 gmc acadia denali in dec 2019. vehicle was equipped with several dealer accessories include roof rail cross-beams. these were not in stock at time of purchase and returned after 1 week to install. after picking up the vehicle on my drive home, i heard a whistling/humming noise coming from the exterior at about 30 mph. as i entered the highway and traveling at 65 mph, the noise was deafening and the vehicle did not handle very well, vibration in the steering. i immediately returned to the dealer and determined the noise was from the roof rail cross-beams. service team that there could be some noise but it would not affect the vehicle handling. i had them removed and the drive home had no issues. buyer beware if you are only getting the cross-beams as an added accessory and will not utilize to carry any items, ie; kayak, bikes, etc.