2021 Tahoe whining sound?

[Gritty B]

Here is the whining noise on my 2021 tahoe with 40K miles. Started when accelerating and now is consistent while in park.

any thoughts here?

 

[StephenPT]

That sounds awful - as bad as it is, it should be pretty easy to diagnose by taking off the serpentine belt and rotating by hand all the pulleys in the accessory drive loop. You should find one of them that feels rough when rotating.

 

[WalleyeMikeIII]

Here is the whining noise on my 2021 tahoe with 40K miles. Started when accelerating and now is consistent while in park.

any thoughts here?

Possibly this:

https://static.nhtsa.gov/odi/tsbs/2023/MC-10240363-0001.pdf

 

[Gritty B]

Thanks for all the help here. It was covered under the powertrain warranty.

 

[BlaineBug]

I had the same issue with my 2021 Z71... I replaced the alternator and the water pump before taking it to another dealership to only be told it was the transmission. YES the transmission at 61,000 miles. The positive is GM handled 75% of the cost.. if thats a positive ??? The negative...It took 9 weeks, more back and forth then I care to admit and zero reimbursement for a rental car. In all fairness, I'm now thinking its the truck. Since that visit to the dealership, the truck has been back twice for not starting. Both times the truck was towed to the dealership, both times I was charged for a diagnoses and both times the answer was " we don't know" This is my 17th GM vehicle. Never had any issues like this in the past.

They are charging you for "ineffective diagnosis" because you're 1,000 miles out of warranty, is that right?

 

[B-train]

I can't believe how the build quality of basic components has gone to shit. Those are items you shouldn't need to touch for at least 100k, if not longer (belt and pulley). As far as other posts about the transmission, I share a similar opinion.

For a comparison, when people say Japanese quality, it's real. I looked at a Mazda 6 for a commuter awhile back and was totally impressed with the build quality, fit and finish, and overall common sense ideas. It shares the platform of the Ford Fusion my daughter has, but you can tell between the 2 which one was designed and assembled by people who care and have a societal sense of purpose. Sorry for the soap box, but it just grinds my gears that people keep spending huge $$ for a quality that doesn't match lately. IMO

 

[bradac]

Here is the whining noise on my 2021 tahoe with 40K miles. Started when accelerating and now is consistent while in park.

any thoughts here?

That is 1000% idler pully, super cheap to fix, considered a wear item, happened to me around the same miles. Ignore all the nonsense everyone else is stating. idler pulley, thats it. Make sure to get the belt replaced with the idler pulley itself. should be about $100 is parts between the two if buying from the dealer.