2015 sierra ; Rattles when i drive over dumps, Rattles bad on dirt roads.

[Dana Rolles]

Hey everyone, 
2015 GMC Sierra LD Crew, from Canada here.

Small cracks, bumps in the roads and potholes cause my truck to make this rattle/squeak .
But on dirt roads the rattle/squeak gets extremely bad. 
Any Ideas out there?,
Its not so much a dashboard rattle, but the sound of something loose/rubbing to create the rattle. 

Heres a link to a video of going from asphalt to dirt when the rattle gets bad

 

[Racindave]

Where does it sound like it’s coming from?

[Dana Rolles]

if sitting in the driver seat, right of the steering column, ish

[Dana Rolles]

10 minutes ago, Racindave said:

Where does it sound like it’s coming from?

if sitting in the driver seat, right of the steering column, ish

[RMR]

I am assuming you have nothing in the glovebox, center console or ashtray that is loose? Sometimes things can roll down the front of the dash as well. I had a 2001 Sierra that I was pulling .22 rounds out of the dash for years. Previous owner.

[Dana Rolles]

18 hours ago, RMR said:

I am assuming you have nothing in the glovebox, center console or ashtray that is loose? Sometimes things can roll down the front of the dash as well. I had a 2001 Sierra that I was pulling .22 rounds out of the dash for years. Previous owner.

Nope, nothing loose in the dash. 

 

[Dana Rolles]

-

[808]

When I swapped out my radio module behind the screen, I tightened up all the bolts holding everything down under the plastic trim.  Every one of them was loose to a certain degree and I had a few squeaks go away after doing that.  There are a host of things in the footwell area that can come loose and wiggle as well so have a look at anything that isnt mounted securely.

[royalkangaroo]

Three things Ive done to my 2015 Sierra which quieted 99% of the rattles/squeaks:

 

Footwell:

Pull off the cover below the steering wheel, tighten all visible screws.  I’ve done this twice now.

 

Center arm rest:

Foam tape on lid including between tabs on handle

https://www.silveradosierra.com/interior/2014-arm-rest-squeak-annoying-t313794-10.html

 

Dash:

 

 

Hope this helps