Hi All. Been a while since I checked in. Did anyone ever get any relief from the booming/pressure/buffeting by installing the Borla exhaust? Back in the day, probably 2 years ago now when this thread was on fire, adding/replacing exhaust was being experimented with before focusing on the tires. Just curious...
I didn't get the Borla, but my 'booming' over bumps was eliminated by clamping weights/dampers on the exhaust. I included pictures further back in this thread if anyone is interested in quantity and placement.
The buffeting was a result of tires. It took 6 Continental replacements to get them quiet [under 10lbs] and I had them re-road force balanced when I putting them back on for the summer. The Continentals have a tendency to flat spot which temporarily re-introduces buffeting. I'm going to put up with them a little while longer and replace them with some Michelins for summer duty. My BFG KO2s are awesome and don't introduce any buffeting. That's probably why I left them on until August! If it wasn't for the fuel economy penalty [they are 14lbs heavier per tire!], I'd leave them on year round.
The vibrating was fixed by replace the rear end.
I've been enjoying my Yukon ever since and only experienced a failed wheel bearing since. While the root cause of the issue may never be fixed or identified on these models, I'm OK knowing that I can control the inputs [shitty or out of balance tires].