2002 Suburban

I have a 2002 Suburban, 126000 miles, 5.3 L. The past two times it has rained, my passenger front floorboard is very wet. When I run the air, the water drains from the ac weep hole. The water is only on the bottom of the floorboard, the slopes feel dry. Aside from the windshield seal, door seals, what else could be the culprit.

Thanks.