metal sound at 30-32 mph only

[700]

First time on this great site.

 

metal/moaning sound at 30-32 mph only

 

I have a 2015 Gmc 2500HD with  73000km's / 45620 miles  with 17" duratracs - (at 30-32 miles per hour only) in 2wd /4wd, in neutral or in gear & speeding up or slowing down I hear this slight metal moan coming from the front drivers side and only at this speed. Tires have less than 7500 miles on them and the noise only started about 3500 miles ago even tried rotating them . brought it to a GM shop and the shop foreman and I went on a test drive and he said he never heard this before and had no clue what it is.

I have put the truck up on a hoist a couple of times in the last few months and had my tech's inspect the front end and bearings and all is good. 

 

Hopefully someone can help me out? 

 

Thanks

 

[Jsdirt]

Just a WAG (wild assed guess) over the internet. Without actually hearing it and the direction it's coming from in person that'll be next to impossible to diagnose. Even video can't really help sometimes.

 

Could be any or all of the following: Front driveshaft (if it was left in Auto 4x4), CV axles, hub bearing(s), brake shims, or a rotted or bent dust shield contacting the rotor lightly.

 

I wouldn't trust a dealership to find this issue. The incentive there is to upsell, not spend hours diagnosing problems. It's the way GM set up the pay structure there. Techs can't work for free. You'd be much better served at a small, local mom & pop garage.

Edited March 17, 2021 by Jsdirt