Just got back from a test drive of a '15 Yukon Denali. Overall, very nice and polished truck. However, I noticed a fair amount of wind noise on the highway. Road noise was well-suppressed, but the wind noise was quite a bit louder than the high end crossovers that I have been in (from the Merc GL, to the Audi Q7 to even the Infiniti QX60). Is this normal or was there something wrong with the example I drove? I do not have a ton of experience with truck-based SUVs.