Sound Deadening After Market

GN2018 · May 9, 2022

So my wife and I took a drive this weekend in our Equinox (2017). Overall it’s a nice vehicle, but it is nowhere near as quiet as my ‘21 Sierra Denali. I did some research and there seem to be a number of products out there for DIY to install to deaden sound, however, I’m no good at DIY. It looks like to add some sound deadening you end up taking the seats out and installing insulation under the carpet. It also seems to go into the doors behind the door panels. In the engine compartment and under the headliner were also mentioned.

My question is, what type of companies do this kind of work? I couldn’t even figure out who to call. The only company that came up was Ziebart and all they seemed to have is an undercarriage spray which I don’t think I’m really interested in. Any help to finding a company to do this work would be appreciated. Thanks.

CamGTP · May 9, 2022

Call a place that does audio equipment, very possible that they also do sound deadening when they put in big stereo equipment.

Donstar · May 10, 2022

I'd look for the source of the noise before attempting to cover it up. The first place would be the tires.

GN2018 · May 10, 2022

1 hour ago, Donstar said:

I'd look for the source of the noise before attempting to cover it up. The first place would be the tires.

I’m sure the tires could be improved, but comparing an Equinox to my full size truck just seems to point to there being little to no sound insulation in the Equinox. I think that’s one of the things they do to make Chevy’s cheaper. It’s one of the main reasons I traded my 2018 Silverado for my 2021 Sierra Denali. My Silverado only had 20K miles on it and I liked it a lot but I did not like the noise. My main car while working was a Buick LaCrosse. That was a very quiet smooth driving car. I guess I’m spoiled, but I gotta believe I can get the Equinox closer.

Tdola · May 12, 2022

Adding this in multiple posts due to upload limits…

Tdola · May 12, 2022

Well unfortunately I can’t upload the pics of the DynaMat Xtreme I added to my interior. But that’s what I did and it took the edge off. I covered the entire interior along with each door.

GN2018 · May 12, 2022

41 minutes ago, Tdola said:

Well unfortunately I can’t upload the pics of the DynaMat Xtreme I added to my interior. But that’s what I did and it took the edge off. I covered the entire interior along with each door.

That’s exactly what I want to do with mine. Let me know when you have time to do my Equinox.

Thanks for posting. So you say it took the edge off. I was hoping more for a miraculously quiet interior. Any better way to describe how much it dampened the noise? Me and DW can’t even really have a conversation on the highway. And, if I want to listen to music, it has to be turned up at least 10% higher just to hear it. And of course the noise still takes a lot away from the quality of the music.

Tdola · May 12, 2022

I don’t do it myself…I had it done by a local company. I have a 2020 Silverado High Country so it’s pretty quiet from the factory. So that’s why I say it took the edge off. It’s not a drastic change but it does make a little bit of a difference. I guess it would have been better if I did a before and after with a decibel meter. Hope this helps.

GN2018 · May 12, 2022

What type of company does this? Can you give me their name? Maybe they know someone local to me.

Also, do you mind sharing how much that cost? Seems like a pretty big bill for labor on a job like that.

Tdola · May 12, 2022

They are on Long Island in NY so it’s a small mom and pop Interior car and truck shop that I’m sure won’t know anyone from Michigan. The DynaMat Xtreme material cost about $400 for the floor and back wall and fire wall which you will need about one box of large sheets plus another 5 sheets from another box and the door panels (from Crutchfield) that were specific to my truck were about $300. Labor was $400. So $1,100 for the whole job. Took about 5 or so hours.