Compressor sounding noise when parked?

Horacio · March 23, 2015

2015 Denali here...noticed after I park in the garage, I can hear what sounds like a tiny little compressor running for like 15 seconds. Anyone else hear this and know what it is??

Rock1500 · March 23, 2015

I hear it as well in my 2014, i figure it was just moving the parts to keep them lubricated.

bdbake01 · March 23, 2015

I never noticed this until today (prior to reading this). Noticed it when I pulled into the garage. Pulsed twice. No idea what it is.

thecobra · March 23, 2015

I sometimes hear what sounds like a little motor running for a few seconds. It sounds like the truck is adjusting the HVAC vents. I have only noticed this when I am sitting in the truck and a few minutes after it has been shut off

galliher_nc · March 24, 2015

Maybe it has to do with the Magnetic Ride Control? I had a Tahoe with Autoride that would make a compressor sound as it was leveling out.

galliher_nc · March 24, 2015

I sometimes hear what sounds like a little motor running for a few seconds. It sounds like the truck is adjusting the HVAC vents. I have only noticed this when I am sitting in the truck and a few minutes after it has been shut off

Does yours have the after blower turned on? They turned mine on because moisture was getting trapped in the system and causing an unpleasant odor. I haven't noticed it but it's supposed to stay on after the truck is shut down to dry any moisture out.

thecobra · March 24, 2015

Does yours have the after blower turned on? They turned mine on because moisture was getting trapped in the system and causing an unpleasant odor. I haven't noticed it but it's supposed to stay on after the truck is shut down to dry any moisture out.

No, this happens after everything is all quiet for a while. I work on the road so sometimes I am in there eating or checking emails. The motor sounds like it is sliding something open or closed, not like a fan

Maybe it has to do with the Magnetic Ride Control? I had a Tahoe with Autoride that would make a compressor sound as it was leveling out.

I'm not too familiar with the system, but I am pretty sure the Tahoes used air compressors for the shocks, where mag ride uses electromagnets, thus no compressors required