I could be wrong but I thought another member posted a tsb about this same issue being the front diff, maybe it is the rear though.
there is another thread about noise when cold and turning.
Humming noise when tightly turning steering wheel, only during cold start and go?
- Thread starter treatyoselfnc
- Start date
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there is another thread about noise when cold and turning.
I had the fluid changed a few weeks ago and they said to drive the truck for 200 miles. If the noise comes back then they said they will put a brand new differential… well I am scheduled to bring the truck next Monday for a new differential…
PS - I own a 2021 Tahoe LS… 25k miles.
PS - I own a 2021 Tahoe LS… 25k miles.
VAguy68
Member
- Joined
- Jan 1, 2021
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I was having this issue, I took my 21 Z71 in for various maintenance items (90K miles). They changed the fluid with additive and the issue has been resolved.
So we just had our 2021 Suburban "fixed" with the TSB about the rear differential fluid. Picked the car up yesterday after they had it for nearly a week AND I STILL HAVE THE MOANING sound when turning! What did you do to get rid of the sound?!
We had ours "fixed" with the service bulletin (https://static.nhtsa.gov/odi/tsbs/2023/MC-10230610-0001.pdf). We picked it up yesterday after they had it for nearly a week and we still have the moaning sound.
WalleyeMikeIII
Full Access Member
Right, but they have to try the fluid first, I bet.
Correct.
