Buzzing noise when opening doors while vehicle off

[SAdude]

Hey all, new to here and proud new owner of a 2021 TX edition Tahoe. Let me start by saying I am very impressed by this vehicle and this is my first Chevy. Yes it comes with reliability concerns, a hefty price tag and a few annoying issues (such as the headliner rattle by the sunroof discussed in a thread here), but overall what an impressive machine!

Im am curious though... What is the buzzing/humming noise when I open any door while the vehicle is off? I think it also happens when I close the door after a few minutes. I also then hear a clunking noise in the dash. I'm sure it's all normal, just curious.

 

[Joseph Garcia]

Welcome to the Forum from NH.

Lots of knowledgeable folks here who freely share their knowledge, experiences, and perspectives. Knowledge is power.

I hope that you will become a participating member in the Forum's discussions.

Pics, please.

I cannot help you with your question, but other folks will chime in with their thoughts.

 

[SAdude]

Thanks for the welcome and here is a pic. I really love this shadow grey metallic color

 

[wjburken]

Welcome to the forum from Iowa

 

[LRMITCH]

Hey all, new to here and proud new owner of a 2021 TX edition Tahoe. Let me start by saying I am very impressed by this vehicle and this is my first Chevy. Yes it comes with reliability concerns, a hefty price tag and a few annoying issues (such as the headliner rattle by the sunroof discussed in a thread here), but overall what an impressive machine!

Im am curious though... What is the buzzing/humming noise when I open any door while the vehicle is off? I think it also happens when I close the door after a few minutes. I also then hear a clunking noise in the dash. I'm sure it's all normal, just curious.

I just bought a 2021 Tahoe LT Signature Package and it makes the same sounds. I’m curious as well. When I’m in the vehicle while it’s off it makes noises in the dashboard area too.

 

[Doubeleive]

buzzing sound is most likely the fuel pump pre pressurizing I think they all do it

 

[SAdude]

I just bought a 2021 Tahoe LT Signature Package and it makes the same sounds. I’m curious as well. When I’m in the vehicle while it’s off it makes noises in the dashboard area too.

Good to know it's not only mine.

 

[Fireman591]

That noise is the fuel pump by the fuel tank bumping up the pressure. I think it is overkill and even does it if I approach the vehicle with a key fob. Maybe that is why my fuel pump control module failed at 616 miles. It will be interesting to see if it pre charges up as much as it did with the original part. Been waiting for that part since the 12th

 

[SAdude]

Thanks for the info on the fuel pump noise. Any idea whats thumping around in the dashboard?

 

[Doubeleive]

the only thing that moves in the dash is the hvac blend doors/actuators, try turning the heater/ac off and see if it still does it

 

[Miami-Dade]

Thanks for the welcome and here is a pic. I really love this shadow grey metallic color View attachment 261141

Welcome from Miami Beach!

Nice 2021 Tahoe Dan! Love the color!

 

[Dogged]

Regarding the fuel pump charge. I too also thought that was silly to link with the approach with the remote keyfob. I was working in my garage and noticed it cycling over and over through the day as is walked in and out of range of the truck. It also turned on the approach lights. It is unnecessary and will lower the life of your pump (how much, hard to tell) and drain the battery. If you walk with your keys near your truck in your daily life (i.e. the interior room adjacent to your garage, you might want to think about that.

The owners manual describes a diagnostic check the electric brakes go through several minutes after shutdown. This may be one of the noises you hear. They would appear to be coming behind the dash on the driver's side.

 

[LRMITCH]

Thank you guys for the info! Here’s ours that was bought a few days ago!

 

[exp500]

Maybe it's the Bluetooth vibrator pairing up? Damm trucks got everything else for wimmenz.

 

[89Suburban]

View attachment 261239View attachment 261227 View attachment 261228 View attachment 261240 View attachment 261228
Thank you guys for the info! Here’s ours that was bought a few days ago! View attachment 261241

Freaks me out that overhead cam view. How dey do dat?

 

[CTown Duramax]

Hello. New here and with my first SUV, a 2021 Duramax Tahoe base LT 4WD, bought a week ago, now has 650 miles.

I've got flies buzzing in mine too. Sorry to revive a year old thread, but then no point starting a new one. Every time I open the door, the buzzing flies noise starts. It does not happen when I only have the key fob in hand and approach. It only happens when I open the door, with or w/o the fob.

Does anyone know anything more about this, other than it's the fuel pump pressuring up like Doublebelieve says? Has there been a change or correction to software or sensors to stop actuation from the fob to address the problems Fireman 591 and Dogged describe?

I don't know why there has to be this much tech. I miss contact switches. Man this thing is big. Awesome ride so far. Happy boy here.

 

[flajax]

Hey all, new to here and proud new owner of a 2021 TX edition Tahoe. Let me start by saying I am very impressed by this vehicle and this is my first Chevy. Yes it comes with reliability concerns, a hefty price tag and a few annoying issues (such as the headliner rattle by the sunroof discussed in a thread here), but overall what an impressive machine!

Im am curious though... What is the buzzing/humming noise when I open any door while the vehicle is off? I think it also happens when I close the door after a few minutes. I also then hear a clunking noise in the dash. I'm sure it's all normal, just curious.

My Yukon and my Raptor both do this. I do believe it's priming the fuel pump.

 

[Doubeleive]

Freaks me out that overhead cam view. How dey do dat?

it's joining all the camera video together into 1 360deg point of view, the view shows the top of a "projected image" not a real rooftop