Hi everyone, I am carz24,
I wish I would have done some google searches before I ordered my new Denali. I specifically waited because i wanted the 8 speed transmission and some of the new toys that came with the mid-year update.
Here was my first post on another thread before I was directed here.
I just picked up a 2015.5 Denali XL and as soon as I drove it home I noticed a resonance noise that drives my ears crazy. Its a low frequency "drumming" noise that is there at most speeds but gets really noticeable around the 68-75 mph. At its worst it can almost feel to my ears like the buffeting when a rear window is left open. I took it to the dealer and they agree its not like it should be but have no idea what it could be, so they are going to contact GM to see if they know. I test drove a 2015 Yukon XL SLE to see how that one sounds and it was every bit as bad. So I am curious if anyone else is experiencing the same thing?
Here are some of my observations; my Yukon Denali XL has the 22's and I thought maybe its the big tires, maybe its the V4 mode, maybe its active noise cancellation.
1. Its not the V4 mode because if I drive it in manual mode and don't let it go past 7th gear it stays in V8 mode and sounds every bit as bad as in V4 mode.
2. I test drove the Yukon XL SLE model with 18" tires and NO active noise cancellation and NO magnetic ride shocks and it was even worse than mine and the sales person commented that he could actually feel the "drumming" in his chest. So I felt like that took away some of the questions in my mind concerning wheel size, active noise cancellation and the magnetic ride option.
3. I also notice the same pressure feeling in my ears when I hit bumps.
4. I notice it at most speeds, but it continues to build pressure in my head and seems to peak from about 68-75 mph. It may be present above that but I did not drive it faster to test it.
5. I notice a slight vibration with the vehicle as well but it is so hard to tell if its road conditions or if its the vehicle.
6. My hunch is that they have a resonance issue with the frame, suspension and or body vibrating at different frequencies that drives the buffeting or resonance issue. Just my guess,
How GM missed or ignored this buffeting noise is beyond me....it hurts my head when I drive it!!