have a 2017 silverado 1500 and after a snowstorm here and having to put the truck into 4wd a few times i noticed a slight whine (like when a vehicle is low on power steering fluid) when the wheel is straight and you turn slighty to the right. Was wondering if anyone ever experienced this and could share any thoughts on the issue. Truck has an electric steering pump....no other problems or lights at all truck drives fine just notice the whine when pulling in to park the truck, thanks.