Clicking/rattle noise under/behind steering column 2022 Silverado 2500HD

[BasikLiberty]

Hey guys - I've followed some of the other threads on noises around the steering column... related to that intermediate shaft - but I don't think mine is the same. Theirs seem to be more clunks when turning etc - mine is more of a rattle sound.

This happens:

• from 30-60mph or so
• even when going dead straight (unaffected by turning)
• Isn't HVAC - as if i turn off the fans it doesn't stop.
• Isn't affected by moving the steering wheel position up/down, in/out.
• I don't see anything loose underneath.
• It happens when I'm on or off the gas as well, and doesn't change dramatically in frequency based on speed. 

 

The dealer just had it for a day and had part of the dash opened up and couldn't find the culprit. They expect to see me bring it back but I thought I'd check if anyone else has seen/heard of this... I swear i found someone in the other thread that had a loose bolt/nut on something deep in the dash for a vent or something?

 

Any ideas guys?

 

(Video below)

 

 

[Epsilon Plus]

Check the nut on the coolant reservoir hold down under the hood toward the driver fender.

[BasikLiberty]

You mean the bolt that holds the overflow reservoir? (The one in the back right of this photo below)
I did take a quick look and the 10mm bolt was loose, took it for a drive - same noise. It sounds like it's more in the dash than the engine compartment.
 

[BasikLiberty]

Update: Had someone put their head closer while I was driving and they think it's actually coming from below my feet. Going to look for something under the truck now... I read someone once saying there was something hitting the transmission bell housing? I'll see what I can find.

[BasikLiberty]

Update: Figured it out... kinda... It could be one of the two things I did. Either way, the noise is gone.

 

This truck originally had a BOSS plow mount on it. When I removed it, it made use of the tow hook locations. But they were longer to compensate - so when I took the plow mount off the bolt ran out of thread before it was tight and rattled. Somehow that resonates up into the cab.

 

That said - I also did look around the transmission for anything that could rattle and found only some of those heat shields that were a bit flappy, i bent them slightly to stiffen them up.

 

Needless to say - one or both of these led to the rattle going away. I doubt very much anyone else would have this situation but hey you never know.

Edited May 11, 2025 by BasikLiberty