Question about 2006 Hummer H3

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I have a 2006 h3 hummer with a water leak behind the glove box when it rains. It soaked the pass side floor mat and I could watch it drip on way to work.It was a good amount of water I had to use the shop vac to get it about 1/2 inch . Where is coming from and can I fix the problem myself ?

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Coming in around cabin filter most likely and fix is a good?

Posted on Mar 21, 2011

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The drain tubes from the sunroof may be clogged, remove the side panel near the door disconnect tube then blow in it, mine had leaves caught in it both sides

Posted on Aug 14, 2012

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Had my windsheild replaced, the drain line in the dash(the panel @ the end of the dashboard, on passenger side will come apart)had came loose.

Posted on Jun 28, 2011

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1 Answer

My 2006 H3 has water leaking into drivers side floor


While H3 is parked on driveway, driver floor mat is removed, and steering turned all the way right to expose splash area, pressure hose the front left steering splash area behind left tire while another person feels with their hands to determine where water is entering. If the leak is beneath, it would only enter when you go through flooded area. When it rains, the water constantly splashes behind the tires, which is an area source for water to enter the driver area while the vehicle is in motion during rain condition. If you live in snow area, they use salt to keep roads clear of snow. Salty water is highly corrosive to exposed steel. In the summer or fall season before snow begins, you steam jet pressure clean the underside, then inspect for any area where undercoating had come off. Take primer spray paint and cover these exposed areas with at least 3 coats of primer paint, or rubber sealant spray.
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2006 H3, leaking rain water in on back seatbelts


GM had a major problem with this issue as models with sunroofs had drain holes that were mfr'd too small. On models without sunroofs, the drains behind the pillars were too small creating the wet/mildewy/dampness issue. All mods were at the expense of the consumer. However if you know a good body and fender man, they can perform this mod for a fairly decent price with excellent results.

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H3 hummer 2006 model.....hot floor board, passenger side


The hot floor is the catalitic converter. It may be bad, but you need to find out why it got hot. usually lean codes will be present with this problem. could be a bad vacuum leak. mass air flow sensor could be bad. as far as the water being a 2006 I do not think it is the windshield, probably the drain is plugged up for your a/c look under the hood, passenger side, there should be a tube that hangs down around where the a/c lines go in to cabin. you can try to back flush it or run something up in it to free it up. good luck

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Whenever it rain, water gets into the floor on the


A leaking windscreen,door seal or window seal. Run a garden hose over your car and use baby powder to pin point where the water is in running from.

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2006 hummer h3 has a leak on passenger side under the dash during a rain storm


My 06 was leaking during rain also. It turned out to be the sunroof. There are two drain tubes in the front of the sunroof that run the water down the corners to the ground and two drain tubes that drain water out the back corners. The water would seep around the glass, which is expected, but both of the tubes on the front of mine were plugged, and the water would overflow behind the dash and fill my floorboards. If my H3 was leaning to the left during a storm then the drivers side would be full of water. If leaning right, then the passenger side. I had to open sunroof and blow compressed air into the drain holes to clear them, but be careful, too much air will separate tubes from sunroof and then you will have to remove the inside paneling around sunroof to get to tubes and reconnect. You may only have one side plugged. you can test it by opening sunroof and pour a little water in the small catch pan in the front of the sunroof and see if it drains as expected (to the ground under the firewall on left AND right side). You can see the holes in each corner of catch pan to drain the water. Plug one with your finger, then the other to find the plugged side. Good luck!! Hope this helps!!

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8 Answers

Water leaks into right side floor board during a blowing rain?


My 06 was leaking during rain also. It turned out to be the sunroof. There are two drain tubes in the front of the sunroof that run the water down the corners to the ground and two drain tubes that drain water out the back corners. The water would seep around the glass, which is expected, but both of the tubes on the front of mine were plugged, and the water would overflow behind the dash and fill my floorboards. If my H3 was leaning to the left during a storm then the drivers side would be full of water. If leaning right, then the passenger side. I had to open sunroof and blow compressed air into the drain holes to clear them, but be careful, too much air will separate tubes from sunroof and then you will have to remove the inside paneling around sunroof to get to tubes and reconnect. You may only have one side plugged. you can test it by opening sunroof and pour a little water in the small catch pan in the front of the sunroof and see if it drains as expected (to the ground under the firewall on left AND right side). You can see the holes in each corner of catch pan to drain the water. Plug one with your finger, then the other to find the plugged side. Good luck!! Hope this helps!!

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4 Answers

06 hummer h3-water on passenger floor after a rain


Hey I have the same problem, but only when it rains, it comes from the sunroof then leaks into the carpet.

Aug 17, 2009 | 2006 Hummer H3

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