Cabin Noise

KLee · October 25, 2015

This is my first time on this forum so I hope I am doing this correctly. I have a 2015 Tahoe with 10,500 miles, it's 14 months old. In the past four or five months there has developed an annoying noise in the cabin, almost sounds like road or tire noise when you are riding on a concrete road with seams in the concrete. That when every time you cross over a seam you hear the noise. The noise is very random and not consistent with equal spaces that would typically be in a concrete road. However I live in Florida with asphalt paved roads with no seams. It is a very deep bass sound, not very loud but enough to be disturbing. You can hear this from 20-25 MPH and higher. My local dealer says the exhaust is causing it and it's louder when it's running on 4 cylinders as opposed to 8 cylinders. It is slightly louder on 4 cylinders but minimum. They keep telling me GM is aware of this and is working on a solution but no results. The local dealer also said Chevy had a similar problem with I believe the Equinox and the solution was to attach weights to the exhaust. I was told by the dealer's top mechanic this did not really solve the problem. Has or does anyone have a similar experience? Any answers?

Tattooo · October 25, 2015

Mine doesn't do that at all....bring it to the dealer, its not normal.....maybe a seal broke

The Zip · October 25, 2015

My local dealer says the exhaust is causing it and it's louder when it's running on 4 cylinders as opposed to 8 cylinders. It is slightly louder on 4 cylinders but minimum. They keep telling me GM is aware of this and is working on a solution but no results.

I don't have an answer for you but neither does your dealer, they don't know what they are talking about. I've owned my Tahoe for 20 months and no noise, V8 to V4 transition is so seamless that I have to look at my display to see when the switch occurred. No difference in sound in my truck during the transition.

BlackZ71Silverado · October 28, 2015

So which is it, road noise, tire wine, or exhaust drone?

If it does actually get louder and becomes more noticeable while in V4 mode, it definitely sounds like you have an exhaust drone problem. Exhaust drone has been an issue in the past with AFM and with aftermarket exhaust systems.

Many have and still do experience this drone when AFM kicks in. The new pickups had an exhaust change, GM added some sort of valve but I don't know if the SUV's received the same design change.

Do you have an aftermarket exhaust installed?

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DMOGIRL · November 20, 2015

my 2015 suburban does the same thing they are talking about. it happens at 1200 rpm which is normally around 43 mph. makes me have to drive faster to get past that noise. it seriously does vibrate and give you that base noise. its terrible....