noise 4hi sierra 2020

[Dr BLOTO]

Hello
 I get a sound when I turn on 4HI mode. I went to the dealer more than once and they told me that this is normal
But I was not convinced because the sound is very annoying
Is there any idea or person who appears to him such a sound

Edited July 4, 2023 by Dr BLOTO

[fatwhiteboy]

19 hours ago, Dr BLOTO said:

Hello
 I get a sound when I turn on 4HI mode. I went to the dealer more than once and they told me that this is normal
But I was not convinced because the sound is very annoying
Is there any idea or person who appears to him such a sound

 

Hello Doc.  I can't hear your noise but mine chirps in 2 wheel high.  All wheel mode and 4 wheel is completely goes away.  There is a bulletin for this and my dealer stated that I was the first to complain about it, imagine that.  The Bulletin No.: PIP5653E states exactly what mine is doing.  If yours sounds anything like a chirp or a grind and it goes away when you press the AWD or 4W button, it is probably the same.  At this point, I have the extended warrantee and am waiting for something else to break before I have the repair this.  If your sound is different look for a bulletin, they will not send it to you, you have to bring it to them.

MC-10173724-9999.pdf

Edited July 4, 2023 by fatwhiteboy

[newdude]

Sounds normal to me?

[Z45]

I do not hear anything.   When operating in 4Hi there are more gears turning, rear axle, transfer case and front axle so some amount of noise it to be expected and it will likely increase/decrease with speed and road conditione.   The tires can also contribute to more noise especially if they are oversize and aggressive tread.   I have driven all makes and owned a GM 4wd truck since the mid 1980's.  The fact that I cannot hear anything abnormal in your video makes me side with the dealer. 

 

Is this your 1st4wd drive truck?

[Gangly]

I hear an occasional whine in the video that my truck definitely does not have.  If that's what you are referring to, then I don't think that's normal.

[Dr BLOTO]

On 7/4/2023 at 10:19 PM, fatwhiteboy said:

Hello Doc.  I can't hear your noise but mine chirps in 2 wheel high.  All wheel mode and 4 wheel is completely goes away.  There is a bulletin for this and my dealer stated that I was the first to complain about it, imagine that.  The Bulletin No.: PIP5653E states exactly what mine is doing.  If yours sounds anything like a chirp or a grind and it goes away when you press the AWD or 4W button, it is probably the same.  At this point, I have the extended warrantee and am waiting for something else to break before I have the repair this.  If your sound is different look for a bulletin, they will not send it to you, you have to bring it to them.

MC-10173724-9999.pdf 97.3 kB · 4 downloads

No, the sound appears when I turn on the 4HI mode
It also shows noise on 2HI at high speeds

[Dr BLOTO]

On 7/5/2023 at 5:02 PM, elcamino said:

I do not hear anything.   When operating in 4Hi there are more gears turning, rear axle, transfer case and front axle so some amount of noise it to be expected and it will likely increase/decrease with speed and road conditione.   The tires can also contribute to more noise especially if they are oversize and aggressive tread.   I have driven all makes and owned a GM 4wd truck since the mid 1980's.  The fact that I cannot hear anything abnormal in your video makes me side with the dealer. 

 

Is this your 1st4wd drive truck?

No, it's not the first four-wheel drive car
When purchased this noise was not audible
And I had such a car, but the 2016 model also did not make such a noise

[Dr BLOTO]

23 hours ago, Gangly said:

I hear an occasional whine in the video that my truck definitely does not have.  If that's what you are referring to, then I don't think that's normal.

Yes, that's what I mean
It appears clearly when the load on one of the wheels