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Little Moisture on Drivers side mat

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Old March 7th, 2018, 8:55 PM
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Question Little Moisture on Drivers side mat

Something strange on 2016 Chevy Express 15 Pass LT 3500. I noticed a little moisture under edge halfway up under the mat. Not much, but wondering why ? No leaks, not antifreeze either.. Just a quarter to half dollar size moisture under lip of mat halfway underneath up on right edge. Nothing else seems to have moisture on it under the mat. It has had the mat removed and area dry. Drive vehicle for a while then the moisture under the mat. No holes it seems.. Got me puzzled.. Any ideas ?

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Kenny
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Old March 8th, 2018, 2:30 PM
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You mean by your feet?
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Old March 8th, 2018, 2:37 PM
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Yes rubber mat, the van has carpet being a 15 passenger van.
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Old March 8th, 2018, 2:54 PM
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I was just out cleaning mine, and looked in to what might be going on with yours. And sorry. Nothing comes to mind.
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Old March 8th, 2018, 2:59 PM
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when the drivers side mat is in, it will be half way down on edge. If you leave the mat down it will draw more condensation. It is water " moisture " with no smell. Nothing seen dripping on outside. Even ran heater through top vents thinking it might be something from bottom vents.. Darnest thing ever. Can't find out anything on internet either. Appreciate it
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Old March 8th, 2018, 6:05 PM
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My van is a passenger model as well, and it has rubber throughout.

Anyway, your van should be under warranty. Take it to GM.
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Old March 12th, 2018, 8:59 PM
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Over 40k on it. When the mat is out no moisture there
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Old March 12th, 2018, 9:00 PM
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Wondering if the doghouse maybe is leaking some air under the mat and getting trapped under the mat.. Oh well..
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Old March 12th, 2018, 9:30 PM
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Maybe. Take a cruise bare footed and see if you feel anything. My guess is that if there is a breeze, it'll be hot air.
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Old March 13th, 2018, 1:34 AM
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Originally Posted by ChevyVanMan View Post
Over 40k on it.
I would still try. In my experience, people are usually pretty understanding about this.

If not then take your garden hose and douse the roof of the van for a while. Remove the trim panel on the left side and the flooring should come up fairly easily. There's nothing holding it down. See if you can track down the point of entry. Sometimes there's gaps in the windshield sealing, and water takes very unexpected paths.
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