I bought a 2007 hummer h3 about 2 months ago. When it rains, water seeps through somewhere in the vehcle. I can he it when I drive. I found the problem at first with the water accumlated in the driver's door. I took it to the dealer, and they fixed that problem, I believe, now it rained Saturday, and I can hear the water somewhere in the vehicle when I drive. What can be the problem?

If it has a sunroof - check for debris in the drains/edges of the seals - supposedly a common problem with H3's,,,and sunroofs. Otherwise - if the heater is working and you are sure it is not coolant/antifreeze leaking from under the dash - check the seals around all windows/windshields. Then check for debris/leaves/pine needles/etc. in any air vent intake to the cabin usually in the firewall/cowl area.