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Tahoe & SuburbanThe power, space, and brutal towing ability make the Tahoe and its longer sibling, the Suburban, arguably the best full size SUV's on the market today.
Glad I found this post, I thought I was going crazy and the last dealer didn’t hear it. I am bring it in Monday as temps are getting colder in TN and it is driving me crazy that it is making the noise. I have the document on the service bulletin someone sent that I will bring with to the dealer but if anyone else has more details of what they need to do to get this fixed, I would appreciate a reply back.
Last edited by sdwyer0428@hotmail.com; Nov 21, 2024 at 12:03 PM.
I purchased my 2021 last year in July. After a month, I started to hear the noise when turning. It’s like a humming noise. Worse when it’s cold. Took it back to dealer and they couldn’t hear it since the car was already warmed up. Just dropped off today at a different Chevy dealer. Let’s see what the outcome is. This is annoying and a 4 year old car should not be making this noise.
Here is the solution to this common problem i fixed my 2021 suburban with the following 3 products and saved thousands because after dealing with this problem for over a year i was going to buy a new differential but before I pulled the trigger I decided to give this cheap solution a try and it worked 100% i have zero noise or vibrations it drives perfect I love my car again. Make sure you get 2 bottles of the ACDelco 10-4091 because the differential fluid capacity is almost 2 quarts.
easy DIY project just need a little hand pump to put in the new fluid after draining the old fluid. drain plug is located at the bottom and fill up plug is at the back of the differential.
Dealerships are going to hate me for this tip Thank me later
So just for reference, you put the 2 bottles of 4091 and 1 bottle of each of the other 2 and that did the trick? Not sure why Chevy doesn’t know this. Seems a lot of people are having the same problem and shouldn’t Chevy be looking into this more for a defect. I know they don’t want to due to cost, but this sucks to pay 70k for a truck with bs like this causing issues.
So just for reference, you put the 2 bottles of 4091 and 1 bottle of each of the other 2 and that did the trick? Not sure why Chevy doesn’t know this. Seems a lot of people are having the same problem and shouldn’t Chevy be looking into this more for a defect. I know they don’t want to due to cost, but this sucks to pay 70k for a truck with bs like this causing issues.
Did you ever figure out if 2 bottles of 4091 and 1 bottle of each of the other 2 is the correct formula?
Just curious, I haven’t brought to dealer and I have never changed the rear differential fluid before. Question though, I have a 4wd so anyone with 4wd have you done the fix suggested with the 3 bottles and if so, anything else I should know to fix the issue?
If anyone is in need of the products that were talked about to fix the issue, I have them and I no longer have my Tahoe and I can’t return them, so let me know and I can give a good discount on all 4 bottles.
thanks
sean sdwyer0428@hotmail.com
has anyone had an update with the rubbing/grinding noise? now that it's for damp in am and colder the noise is worse. brought it to deal once and they replaced brakes a rotors all around ( ridiculous i know). would appreciate any help.
Glad I found this...going to pick up mine today after my 2nd attempt to explain this rubbing noise when turning, Dealer cannot replicate even after leaving overnight. I printed service bulletin and will show advisor when picking up.
QUESTION: my noise seems to come from the front wheels when turning from a cold start. The service bulletin states complaints coming from rear of vehicle; wondering if this is a separate issue?
Will keep you update if i hear anything different.
So the dealership called me back last Thursday morning (sometime after I made the post above). Service advisor was happy to tell me that he discussed the issue with the warranty department again, and they decided to cover it under the powertrain warranty. They knocked it out that day, and I was able to pick it up Friday. The sound is gone, and I hope it stays that way.
The moan/groan sound is back. The sound is only present during cold, low speed / idling turns. Once the oil in the diff warms up, the sound goes away.
I am going to order the oil, and do the service myself. I live too far from the dealership to jack around with them again.
I will post my update once complete.
The moan/groan sound is back. The sound is only present during cold, low speed / idling turns. Once the oil in the diff warms up, the sound goes away.
I am going to order the oil, and do the service myself. I live too far from the dealership to jack around with them again.
I will post my update once complete.
Did the service myself. All good now!
BTW. The Yukon additive stinks........don't get none on ya! LOL
2021 Z71- rubbing sound
I love my car again. Make sure you get 2 bottles of the ACDelco 10-4091 because the differential fluid capacity is almost 2 quarts.
