While installing jump seats into my GL I noticed a bubbled rust spot on the
floor just behind the front passenger seat/battery box a few inches inboard
from the sliding door.  After some poking with a screwdriver I discovered
this patch was much larger than I first thought.  It turns out this spot is
in an area where a number of floor panels come together and there is a lot
of joint sealer in the same area.  It looks like the left to right frame
rail just beneath this area has a couple of roughly 3/8" diameter holes of
unknown purpose in the portion of the rail upon which the floor panels rest.
I think these holes allowed some salt or salty slush to accumlate between
the top of the rail and the bottom of the floor panels in this area causing
almost complete rust through :-(  Wondering if anyone else has noticed a
problem in this area as this seems like a potential problem area.  It's odd
because the rest of the van (other than the seams) has been holding our
against rust pretty well, no other rust through anyway.

Mark