lack of sound deadening

Duramax2021 · August 20, 2021

has any noticed that the roof on these trucks is tingy. i feel like there is zero deadening. anytime it rains its super loud in the cab. is there anything that can be done to deaden the sound besides turning up the radio haha

JimCost2014 · August 20, 2021

2 hours ago, Duramax2021 said:

turning up the radio haha

Welcome to the site.

You stole my answer

There is so much going on under the headliner in there trucks, makes you not want to take them down and experiment.

Are there any custom Hot Rod/Truck shops in your area? Maybe stop in an and get their two cents on how they make cars quiet with all of the electronics and ducting under the liners

EddDe · August 20, 2021

Sheet metal on cab roof is so thin it will actually wobble/bounce when you go thru air blower after car wash. Dealer service advisor told me to check with their body shop about it. Body shop said others with 2019-2020 Silverado have complained, but Chevy will not do anything about it.

AirForceAngler · August 20, 2021

If you're brave and have the time, you could remove the headliner and install some dynomat or similar product. They make it with an adhesive back that you could stick to the inside of the roof then reinstall the headliner.

eppieguy · August 20, 2021

16 minutes ago, AirForceAngler said:

If you're brave and have the time, you could remove the headliner and install some dynomat or similar product. They make it with an adhesive back that you could stick to the inside of the roof then reinstall the headliner.

And ^^^^ is about your only and best choice.

Buddy A · August 22, 2021

I installed Killmat in my Sierra. Nice improvement. While I was installing it I would tap on the panel to listen for a difference before and after. Worth the effort. I did not totally remove the head liner. Lot of extra work to totally take the headliner out of the truck. I lowered it and installed the sound deadener. Worth it to me.

RCF71 · September 2, 2021

Holy $hit batman, this thing (2021 GMC AT4) is LOUD in the rain! By far the loudest vehicle I’ve ridden in during a fairly hard rain with bigger drops!

I hate the idea of dropping the headliner but not sure I can live with how loud this is...

@Buddy A mind sharing any more details/pics on how you did that?

Edited September 2, 2021 by RCF71

Buddy A · September 5, 2021

On 9/1/2021 at 7:44 PM, RCF71 said:

Holy $hit batman, this thing (2021 GMC AT4) is LOUD in the rain! By far the loudest vehicle I’ve ridden in during a fairly hard rain with bigger drops!

I hate the idea of dropping the headliner but not sure I can live with how loud this is...

@Buddy A mind sharing any more details/pics on how you did that?

I did not take pics unfortunately. Removed a pillar covers, b pillar covers, and all attachments on the top. Then lowered each corner to fit my arm in to install the sound deadener and vibration damper. Pulled it down just enough to fit my arm in.

RCF71 · September 6, 2021

3 hours ago, Buddy A said:

I did not take pics unfortunately. Removed a pillar covers, b pillar covers, and all attachments on the top. Then lowered each corner to fit my arm in to install the sound deadener and vibration damper. Pulled it down just enough to fit my arm in.

Thanks! I may have to attempt this over the winter (once it’s below 80F that is)!

I did put Dynamat in a truck years ago, so pretty familiar with installing the stick on stuff. It’s dropping the headliner that’s a little unnerving!