Good morning everyone. I picked up my Yukon on Friday with bad news. After the last exhaust fix and engine mounts GM has no other fixes currently available. I will say my truck is somewhat better after everything they have done to it. (you can read my prior posts to see what they have done). I road with a GM field rep for 15 or so minutes and she heard the buffeting when speeds were maintained and the vehicle was in V4 mode.
However when they road in it again the same day with another field engineer and the PicoScope(measures sound) the PicoScope registered the vehicle within normal range.What I think happened during this test drive is the rep didn't maintain the speed long enough for the machine to register the sound for a long enough time for it to register. So basically they can't do anything else for me. They offered to make a car payment for me. While that is a nice gesture, it doesn't fix my Yukon.
******There is a workaround to prevent the noise from happening and it works 100% for the buffeting noise). The booming over bumps is something that won't change and I guess I will have to get used to.
Here is what you can do to band-aid the buffeting issue.........
When you turn your vehicle on. Shit from P or M ( This shifts to manual). Press the "+" button on the gear shift until the info screen reads "M5". If you are planning on going over 60 MPH, place it in "M6". And drive along your merry way(it will shift like normal in the manual mode). This prevents the vehicle from going into the dreaded V4 mode.
Yes I am loosing some MPG, but I have no more buffeting issue.
I am well aware that I should not have to go through all this trouble to drive my $65,000 vehicle, but I am willing to do it for now as I have too much going on in my life to take on the Lemon Law process. So I guess General Motors beat me down...they won.