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Discussion Starter · #1 ·
I went to the garage to get something and heard a noise that sounded like a small motor running, maybe like a small 12 volt compressor. I finally traced it to the rear of the Ascent, at least it seemed louder back there. I went out several times to check on it and after a few minutes it shut off. Not sure how long it had been running. It had been parked for several hours after making my daily run to Lowe's for our bathroom remodel.

I did a little searching and couldn't find anything so thought I would ask if maybe someone knows what this is.
 

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From page 9 in the owners manual.


Noise from under the vehicle S00AK01
NOTE
You may hear a noise from under the
vehicle approximately 5 to 10 hours
after the ignition switch is turned to the
“LOCK”/“OFF” position. However, this
does not indicate a malfunction. This
noise is caused by the operation of the
fuel evaporation leakage checking system
and the operation is normal. The
noise will stop after approximately 15
minutes.
 

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Discussion Starter · #3 ·
Thank you. I figured it was something like that and should have looked in the manual. I would bet this has been asked before so my apologies. In my defense the Ascent is the wife's and she is the one who has been reading the manual.
 

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Discussion Starter · #5 ·
You know, I remembered, or at least thought I remembered that thread but guess I used the wrong search words. My other defense is age related but don't want to go there.
 
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