2021 Tahoe z71 rear end going out

[Larrysmith1017]

I have a 2021 Z71 Tahoe the rear end making a running noise at low speed turns. We have don’t the gear flush per service bulletin it only made it louder. Any ideas before I have to get Chevy to order a rearend that they claim none instock

 

[WalleyeMikeIII]

Well, if still under 60K, I would let them replace it...its warranty.

 

[Larrysmith1017]

Well, if still under 60K, I would let them replace it...its warranty.

82500 miles. They quoted $2700 to replace. I just spent $1000 last week for water pump and belts.

 

[WalleyeMikeIII]

Oof

 

[tom3]

That sounds more like a rear wheel bearing than a differential problem.

 

[Cjamaco79]

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

 

[GSantana]

Did you add both additives or just one? And have you had any issues after doing the change?