Does my 2020 Tahoe have an air compressor? I hear a noise, sometimes.

[Joseph Garcia]

Great suggestion, I will give that a shot. Going off of memory, I don't recall hearing that noise right when I start the vehicle. You'd think if there were a small leak it would kick on the compressor to fill it with air, but I don't know much about the vehicle, I'm learning as I go.

Thanks.

The compressor should start for 4-5 seconds almost every time that you start the truck, after leaving it off for several hours, as part of the diagnostics routine upon startup.

 

[nomech]

The compressor should start for 4-5 seconds almost every time that you start the truck, after leaving it off for several hours, as part of the diagnostics routine upon startup.

I've put 160k miles on the car and I just don't recall hearing that on startup. Of course I am not accusing you of being wrong, you seem to know what you are talking about, I'm just going off of my memory. When I first heard that noise happening more often (about a month ago) it was not a familiar noise to me.

I will pay closer attention, thank you.

 

[Joseph Garcia]

I've put 160k miles on the car and I just don't recall hearing that on startup. Of course I am not accusing you of being wrong, you seem to know what you are talking about, I'm just going off of my memory. When I first heard that noise happening more often (about a month ago) it was not a familiar noise to me.

I will pay closer attention, thank you.

No worries. Yes, I'm quite familiar with that system, as I had to reinstall it, along with module changes and re-programming, as the previous owner had stripped out the Z55 system and replaced it with cheap passive shocks.