2021 Tahoe Noise Issue

[Prosupporter]

It is written using a translator and poor English.
I am Korean. I bought Tahoe 2021 in Korea. My tahoe is making noise and I've visited the service center more than 4 times due to this problem. It is difficult to talk about this problem because there are not many and few vehicles in Korea. I found this site while searching the web. I'll upload a YouTube video. Does anyone here know the same problem or solution? I hear a strange sound in the cabin, is this the sound of all the taho?

 

[B-train]

Welcome and thank you for the explanation and video.

Does the noise change with the blower speed for the air conditioning or heater? Does turning off the blower make it stop?

Have you tried making the air blow out at different areas (floor, middle, defrost) to see if it changes?

Does it make the noise with the engine OFF, but accessories on?

Does the noise change with engine rpm?

Does the noise change with vehicle speed?

 

[Prosupporter]

Welcome and thank you for the explanation and video.

Does the noise change with the blower speed for the air conditioning or heater? Does turning off the blower make it stop?

Have you tried making the air blow out at different areas (floor, middle, defrost) to see if it changes?

Does it make the noise with the engine OFF, but accessories on?

Does the noise change with engine rpm?

Does the noise change with vehicle speed?

It occurs regardless of the air conditioner or heater power, and noise is generated regardless of RPM or speed.
There's a sound when you turn on the engine.
Noise is usually generated when the brakes are applied (stop) on the D stage.

 

[B-train]

Interesting....

If you are in D and just coasting without any throttle or brakes does the sound go away?

 

[B-train]

I reviewed the video again and it sounds rhythmic to engine rpm/vibration at idle. I would suggest having a friend or spouse help you with this:

1. Have them duplicate when in D and you can see if the noise is present or noticeable outside the cabin

2. Open the hood and repeat.

Attach videos if you hear things differently or can possibly pinpoint a general area

 

[Prosupporter]

Interesting....

If you are in D and just coasting without any throttle or brakes does the sound go away?

Noise occasionally occurs while driving. Noise is not generated in P, N, and R, but only in D.

 

[Prosupporter]

I reviewed the video again and it sounds rhythmic to engine rpm/vibration at idle. I would suggest having a friend or spouse help you with this:

1. Have them duplicate when in D and you can see if the noise is present or noticeable outside the cabin

2. Open the hood and repeat.

Attach videos if you hear things differently or can possibly pinpoint a general area

It was a small number of cars, so I went to a direct repair shop, and many mechanics confirmed the noise. In Stage D, the mechanics tried to find the cause by opening the hood, but the mechanics couldn't find the cause of the noise. No sound is heard outside, but only inside.

 

[B-train]

It will most likely require 2 sets of ears to try and track the noise down.

My first thought is maybe the electronic gear shift mechanism?

Maybe the vacuum pump has a loose connection?

Or there is some sort of shield rattling would be my 3 guesses w/o actually seeing it in person.

 

[B-train]

It was a small number of cars, so I went to a direct repair shop, and many mechanics confirmed the noise. In Stage D, the mechanics tried to find the cause by opening the hood, but the mechanics couldn't find the cause of the noise. No sound is heard outside, but I'd

I'd look inside near the gear shift switch then

 

[B-train]

I know the time difference may be an obstacle, but I'm sure others will chime in.

Best of luck