Water leak - Passenger side

[kmleong]

After parking outside in heavy rain, I found 1.5 inches of water passenger side front. Took it to the bodyshop and did the water test for 2 hours. Sunroof,marker lights,windshield,cowl,doors, everything. Couldn't find a leak. Marker lights were RTV'd previously. Parking angle (facing down) was the same. It only leaks when parked in the rain. If I clean it up and drive in the rain, I don't find any water. Any suggestions?

[HummerJim]

Had a similar problem two years ago and cleaned the hoses for the sunroof drains with a long wire and siliconed the marker light holes in the roof and no water since then. I'm not sure which one was the culprit, but it worked!

[Devis1957]

I had the same problem of only leaking while parked..........2006 H2 SUV.........passenger side

There is a post by me on the Forum. After 18 months and numerous attempts to get it to stop leaking by the dealer, including changing the windshield, it turned out to be leaking through the roof channel sealant above the passenger side and down the "A" pillar. Mine actually leaked out of the grab handle on the "A" pillar.