anyone have this prob when it rains

Ok I have a 89 B2200 reg cab. Every time it rains when I drive it after it sounds like water sloshing around behind the b pillar or somewhere near it, I dont know where it is at.Does anyone else have this problem and if so have you been able to stop the water and where is it coming from?? thanks in advance

ya i have this problem too, i drilled a small hole in the back of the rocker on each side and drained atleast a liter and a half of water out of the rockers, so i went and sealed up the rust problems i had, and i thought i sovled the problem, but one day i got caught in a rain storm and problem came back, so i waited till it dried for a few days and took the sill plates apart and rust proofed the shit out of it, and left it, so i dont drive it in the rain or even when it looks like its going to rain out, it'll rust out eventully but i hope i dont own the truck by then,

so the answer is no clue, i had a rotting kick panel and cut it out and replaced it all with new metal and sealed it but i dont know where else its comming from

was it actually in the back or was it up front? I am betting it is coming from the damn plastic plates behind the doors..

my cab plus does it around the B piller and my regular cab leaks in the front some where u can watch it run down the firewall on the inside of the cab dont know were ethier is coming from

SEAM SEALER AND SILICON =

SEAM SEALER AND SILICON =