Fuel pump priming when doors open?

[LSX Z28]

My 2020 2500HD gas sounds like the fuel pump or something similar starts up when I open a door. Is that normal? I only notice it when it has been parked in the garage for a while and I go out after it has been sitting for a while. It also did it the other day when I shut the hood after it had been left open for a few hours. 

[ShotgunZ71]

Yes, if the truck has sat for a decent amount of time, the pump will prime back up at first unlock. Only after it's been sitting still for a while. Merry Christmas, as well!

[LSX Z28]

1 hour ago, ShotgunZ71 said:

Yes, if the truck has sat for a decent amount of time, the pump will prime back up at first unlock. Only after it's been sitting still for a while. Merry Christmas, as well!

Thanks! I assumed that it was normal, but figured I would ask. Merry Christmas to you as well!

[20L8TSierra24]

My 19 Tahoe does the same thing. Normal 

[Christopher Murphy]

Does anyone hear static at idle with radio off and air off? Sounds like noise coming from the speaker or behind instrument cluster. Even changes/increases with engine rpm until it stops when rpm is up around 2k. Sounds like speaker static up on the dash. Can hear it at stop light or in driveway. 

[Brian Ball]

Cool, samthing with my 2020.

[Srode1]

My '18 does that, I wondered what the noise was when opening the door.  My '15 did not do that - both 6.2 engines. 

[GMCustomerService]

6 hours ago, Srode1 said:

My '18 does that, I wondered what the noise was when opening the door.  My '15 did not do that - both 6.2 engines. 

We would like to learn more. Will you please share you VIN via email at [email protected]? By sending us a message, you consent to the information you provide being monitored and recorded by GM or those acting on GM’s behalf, subject to the GM Privacy Statement: https://www.gm.com/privacy-statement.

[Srode1]

On 4/20/2025 at 2:48 PM, GMCustomerService said:

We would like to learn more. Will you please share you VIN via email at [email protected]? By sending us a message, you consent to the information you provide being monitored and recorded by GM or those acting on GM’s behalf, subject to the GM Privacy Statement: https://www.gm.com/privacy-statement.

Curious, why the interest in learning more - is this not supposed to happen on an '18?   My comment wasn't a concern just and observation.  

[Pryme]

13 hours ago, Srode1 said:

Curious, why the interest in learning more - is this not supposed to happen on an '18?   My comment wasn't a concern just and observation.  

Mine does it too. With all four doors and the tailgate. It’s my least favorite thing about my truck so I guess that’s not bad.  It’s so annoying because it will sometimes do it a couple times if I’m loading my bed and also opening doors. If it only did it with drivers door once it wouldn’t be too bad but why all the doors? Is someone going to enter the rear door or tailgate to start the truck? 

[TrueBlue]

On 4/20/2025 at 11:48 AM, GMCustomerService said:

We would like to learn more. Will you please share you VIN via email at [email protected]? By sending us a message, you consent to the information you provide being monitored and recorded by GM or those acting on GM’s behalf, subject to the GM Privacy Statement: https://www.gm.com/privacy-statement.

 

At least this time you're letting folks know that their information will be shared. Wish you had let me know when I bought my truck that you would be sharing my driving info with my insurance company. Not sure I'd trust GM with any further information about me or my truck at this point though.

[carkhz316]

On 4/20/2025 at 1:48 PM, GMCustomerService said:

We would like to learn more. Will you please share you VIN via email at [email protected]? By sending us a message, you consent to the information you provide being monitored and recorded by GM or those acting on GM’s behalf, subject to the GM Privacy Statement: https://www.gm.com/privacy-statement.

Sheesh. This is why I can't take this lip service seriously when they don't even know how their own vehicles work.

 

 

Driver Door Open Prime (DDOP) or Wake-Up Fuel Pump Prime (WUFPP

 

 

 

TL;DR: This is by normal and by design. Beginning with 2017 MY vehicles, the fuel pump will prime in anticipation of a engine start/ driving event.

Edited May 26, 2025 by carkhz316

[Pryme]

On 5/26/2025 at 8:24 AM, carkhz316 said:

Sheesh. This is why I can't take this lip service seriously when they don't even know how their own vehicles work.

 

 

Driver Door Open Prime (DDOP) or Wake-Up Fuel Pump Prime (WUFPP

 

 

 

TL;DR: This is by normal and by design. Beginning with 2017 MY vehicles, the fuel pump will prime in anticipation of an engine start/ driving event.

Then it should do it upon opening the drivers door only. Mine does it with all four doors and the tailgate. Supposedly normal. Is someone goi by to start the truck from the truck bed?  It is a bit annoying imo. 

[carkhz316]

2017-2018 are drivers door; 2019+ are any of them. So going by your avatar, I'd assume you have a 2020+ HD. My '21 behaves the same where if any door/ tailgate is opened after some time of dormancy, the fuel pump will prime.