Humming noise when tightly turning steering wheel, only during cold start and go?

[eric22tahoe]

Roger that.

its not coming from the motor, remote start hasnt helped me

 

[AJMBLAZER]

It's the rear axle. Draining and refilling ours last weeks seems to have made the noise go away completely.

Can you park the truck outside the dealership over night? I had to do that to get it fixed this last time. Also parked it so they had to do at least one big turn to get it into the bay. Requested that a tech drive it when it was cold. Sure enough they found it. Also give them the TSB number referenced earlier in this thread.

 

[mikepankau]

Ditto on the TSB. Had mine drained and refilled and the problem cleared up. Dealer said they've seen it take 2 or 3 flushes to fully clear up and if it happens again to come back.

 

[fondupot]

my 22 tahoe also doing it, remote start doesnt seem to make a diffence on days where outside temp is below 30 the noise is constant. on days where its slightly warmer out the noise only occurs when we first start driving. 30k miles... npise began at 29,000 miles.. when i get to dealer..20 miles away I cant replicate it.. very frustrating---

Ditto on the TSB. Had mine drained and refilled and the problem cleared up. Dealer said they've seen it take 2 or 3 flushes to fully clear up and if it happens again to come back.

Try this