2017 Yukon Denali with Magnetic Ride. The driver's front suspension is making a noise that sounds like an owl hooting or a pigeon cooing. The noise stops when it is really cold outside. The dealer said it is coming from the bumpstop / jounce stop, but they want $1,100 to replace both front bump stops and won't guarantee that will stop the noise. The noise occurs with even the slightest movement of the suspension. Does anyone have any idea if the bumpstop could be causing such a sound, or any other ideas what it may be? Thanks.