On my 98 Chevy Astro everytime it rains, water starts entering the very back of the van most likely from the right passenger rear side (because the carpet is more wet there). Towards the drivers side at the rear, it stays mostly dry. I tried lubricating the weatherstrips and adding a peice of weatherstriping under the long plastic that holds down the carpet, but I'm still getting water inside. I do not know how the water is entering and from where (from the roof rack, or stoplamp, or under the rear hatch doors)? If anyone has had similar experiences and knows where a common location for water entrance is on these vans, your help would be greatly appreciated. Thank You.