Mystery noise from back end on new 21 Sierra 1500 SLT

[intimidator01238]

On 5/5/2021 at 3:49 PM, Dogdad said:

Check out my last post. Installed the Spring thing kit. No more clunking sounds finally!! 

Thanks for the info! Roughly how thick is that rubber? I’ve got a piece of rubber I’m thinking to cut like this.

[Dogdad]

21 hours ago, intimidator01238 said:

Thanks for the info! Roughly how thick is that rubber? I’ve got a piece of rubber I’m thinking to cut like this.

It’s 1/4” thick. You can buy a 1/4” 12 x12 sheet on Amazon for $21 also 

[GeorgiaRST]

On 5/5/2021 at 3:49 PM, Dogdad said:

Check out my last post. Installed the Spring thing kit. No more clunking sounds finally!! 

I put them on last week and the sound is completely gone as well.  I let the customer care rep at the dealership know and they just stopped responding to me at all. I did report the issue to Chevrolet and GM. I can’t fathom why they wouldn’t want to fix this especially since it’s so easy to remedy. 

[Dogdad]

1 hour ago, GeorgiaRST said:

I put them on last week and the sound is completely gone as well.  I let the customer care rep at the dealership know and they just stopped responding to me at all. I did report the issue to Chevrolet and GM. I can’t fathom why they wouldn’t want to fix this especially since it’s so easy to remedy. 

Great to hear! How do you report it to GM?

[Tnordi]

I just bought a 2018 62k Sierra and sure enough, the same sound. It’s crazy because I also, really only notice it backing into my driveway. It seems to be a common theme.