I had the same thing and seem to have stopped it by doing two things,
and I have no way of knowing which. But they're both easy.

First, clean the rubber seal where it contacts the door. Scrub it with
a kitchen scrubber and armorall. Wax the body where the seal contacts
it. If there's any dirt or crud between the two, then you don't have a
seal.

Secondly, find the crack at the bottom of the window where the rubber
(almost) butts together and fill it neatly with silicon glue.

No more wet rear pad for me.

Jim

On Jan 7, 2004, at 10:37 PM, John Rodgers wrote:

> I'm curious about this also. My 88 GL has the same problem. The rear
> pad
> and insulating cover over the engine hatch is wet by the right rear
> window each time it rains. Doesn't appear to be from the rear hatch,
> but
> the rear side window somehow. I did pull that plastic locking bead out
> because it was so faded and broken in places. I wonder if this has
> casue
> d the leak.
>
> John Rodgers
> 88 GL Driver
>
> BillM wrote:
>
>> On my 91GL there is a black plastic vent in the rear most part of the
>> rear side windows. When it rained last weekend water got through it
>> somehow. Is this a real vent? Do they all leak?
>>
>> Bill M
>> Mystic,CT
>>
>