'22 6.2L Can't Stop Whining

Anthony Bessel · December 20, 2022

I've been pulling my hair out trying to figure this out. My '22 6.2L has a very loud but very specific whining sound.

What I know about the sound so far:

Only occurs at 1600-1900RPM
The sound cannot be heard when outside the above RPM range
100% dependent on engine speed
0% dependent on wheel speed
Higher throttle angle makes the sound louder but the pitch remains the same
The sound does not occur in Park
The sound does not occur at speed, within the RPM range above, but with the transmission in neutral
4WD mode has no effect on the sound

The sound itself is what I would expect to hear with a bad alternator or a worn ring/pinion. I've seen the bulletins on the 10L80/10R80 and I do understand that some whining noise is expected but my specific example is loud enough to overpower the radio, road noise, and Max Defrost with the windows up. It's slowly driving me insane. Enough so that I've started thinking about looking for something else.

My dealer said it's a normal sound for the 6.2L but unfortunately I can't test that theory because 6.2L trucks are impossible to find on the lot without a name attached to them. I'm hoping someone here can chime in with their experience.

GMCustomerService · December 23, 2022

On 12/20/2022 at 9:54 AM, Anthony Bessel said:

I've been pulling my hair out trying to figure this out. My '22 6.2L has a very loud but very specific whining sound.

What I know about the sound so far:

Only occurs at 1600-1900RPM

The sound cannot be heard when outside the above RPM range

100% dependent on engine speed

0% dependent on wheel speed

Higher throttle angle makes the sound louder but the pitch remains the same

The sound does not occur in Park

The sound does not occur at speed, within the RPM range above, but with the transmission in neutral

4WD mode has no effect on the sound

The sound itself is what I would expect to hear with a bad alternator or a worn ring/pinion. I've seen the bulletins on the 10L80/10R80 and I do understand that some whining noise is expected but my specific example is loud enough to overpower the radio, road noise, and Max Defrost with the windows up. It's slowly driving me insane. Enough so that I've started thinking about looking for something else.

My dealer said it's a normal sound for the 6.2L but unfortunately I can't test that theory because 6.2L trucks are impossible to find on the lot without a name attached to them. I'm hoping someone here can chime in with their experience.

This is certainly not what we like to hear, Anthony Bessel. Please know, customer satisfaction is extremely important to us. Our team would be more than happy to take a closer look into the concerns with your truck. To do so, please send an email to [email protected] with ATTN: Anthony Bessel/GM Trucks in the subject line.

Please include your contact information, VIN, a brief description of your concern, and the name of your preferred dealership. We look forward to hearing from you. To learn more about GM’s Privacy Policy, please visit https://www.gm.com/privacy-statement.html. The information you provide may be monitored and recorded and is subject to the GM Privacy Statement.

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Transient · December 24, 2022

Iirc, the 6.2 is known for a squeaky belt. Has the dealer tried to address that issue?

L87Powered · December 27, 2022

Agree with Transient squeaky belt. Haven't experienced with current truck but have encountered this in the past with others.

Anthony Bessel · December 28, 2022

I found a Youtube video that demonstrates the sound. The link should take you to the 7:10 mark. As he pulls out you can see the tach. As the needle sweeps past 1500 to 2000 you can hear precisely what I'm talking about:

The difference is he only briefly enters that RPM range but for my style of driving I end up there often.

Anthony Bessel · January 3

Does anyone else have this sound in their truck? I understand the 10L80 is going to exhibit some whining sound due to the nature of the design but in my case, the sound can overpower the defroster, radio, and road noise. I'm trying to understand if my case is normal or if there's something that needs looking at.

briansol · January 9

i can't hear anything over his yapping in the video. What exact second do you hear it?

I have something coming in too. def not a belt or from the front of the truck.

seems to be behind me (rear drivers side). high-pitched wine-like sound, but it's not rpm fluctuating. it's either making it or it's not and it seems to be TPS controlled/activated.

i can only reproduce it when i'm driving slow (eg, with my wife and kids in the truck). when i'm romping around solo, i never hear it because i'm in the throttle a lot heavier.

It's really 5% throttle, in the 20-50 mph range (observed)

same pitch regardless of speed or rpm (which tells me it might not be gear or diff wine at all).

When i park the truck i hear a similar high pitched noise for 20 seconds after turning it off. I assume this is the fuel pump primer or something still running, but it's not the same sound.