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2022 TB LT 1.2/cvt
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2022 LT 1.2 engine Hey guys really liking this website. So when I open driver side door I hear what sounds like a small electric motor running coming from back seat? It lasts maybe 3 or4 seconds and then shuts off. Anyone know what I'm listening to? Thanks Joe
 

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2021Trailblazer RS AWD Scarlet Red Metallic
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Electric fuel pump priming the system so that the high pressure DI mechanical pump is ready. It usually only does this if the vehicle has been sitting for a little while.
 

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2022 LT 1.2 engine Hey guys really liking this website. So when I open driver side door I hear what sounds like a small electric motor running coming from back seat? It lasts maybe 3 or4 seconds and then shuts off. Anyone know what I'm listening to? Thanks Joe
This is my only complaint about my TB. I suppose I should consider myself lucky as this is not a major problem, but it just bugs me to no end. Just seems with all the technology in the world, in automotive circles, that this could be done in silence.
 

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2021 LT AWD
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This is my only complaint about my TB. I suppose I should consider myself lucky as this is not a major problem, but it just bugs me to no end. Just seems with all the technology in the world, in automotive circles, that this could be done in silence.
It is a mechanical pump that sends the fuel from the tank to the engine. I don't know of any pumps that are totally quiet, and suspect that engineering one would not be worth the cost. As far as fuel pumps go, I find the TB's to be about average in terms of volume. I think the issue is that, in older cars, the pump activated and primed when you put the key to "run" so it would be ready to start when you turned it. As such, it was often drowned out by the other "start up" noises (chimes, radio, etc.) and less noticeable. With push-button start, the car has no "warning" that you're about to start the engine so it primes the pump when you open the door and no other sounds are coming from the vehicle.
 

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It is a mechanical pump that sends the fuel from the tank to the engine. I don't know of any pumps that are totally quiet, and suspect that engineering one would not be worth the cost. As far as fuel pumps go, I find the TB's to be about average in terms of volume. I think the issue is that, in older cars, the pump activated and primed when you put the key to "run" so it would be ready to start when you turned it. As such, it was often drowned out by the other "start up" noises (chimes, radio, etc.) and less noticeable. With push-button start, the car has no "warning" that you're about to start the engine so it primes the pump when you open the door and no other sounds are coming from the vehicle.
Owned many Chevy's for years. Never owned anything but. Most recently an Equinox. Silent when I opened the doors. That is what caught me so off card the first time I heard this noise. I even went back to the dealer service department the next day after I picked up the TB. The "advisor" was useless. Said it is something unique (didn't say what) to the TB that they don't hear it on other cars.
 

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2021 Trailblazer Activ Zeus Bronze Metallic (+2022 Silverado 1500 RST Z71)
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My 2022 Silverado does the same thing. My previously-owned push-button-start Cadillacs made the sound as well. Perhaps some cars handle it more quietly than others, but I think it's something we're stuck with in modern ICE vehicles.

I think the base trim of the Ford Maverick is available without push-button-start. I suspect it doesn't make the fuel pump noise until you turn the key. 🤷‍♂️
 

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My 2022 Silverado does the same thing. My previously-owned push-button-start Cadillacs made the sound as well. Perhaps some cars handle it more quietly than others, but I think it's something we're stuck with in modern ICE vehicles.

I think the base trim of the Ford Maverick is available without push-button-start. I suspect it doesn't make the fuel pump noise until you turn the key. 🤷‍♂️
I just never heard it on my push button starts until the TB. Not on my Equinox (I've had 2 of them over time), not on my wife's Honda CRV. Maybe it is just disguised better in those cars so it is not so loud and noticeable. I'll get used to it I suppose (no choice) but so far I have not.
 
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