I belive there are two retaining nuts that you can access via the truck. In my 93, that is where they are, I think. If not, remove the cushion of the seat and look for retaining nuts back there.
Hope this helps.
Carl
how does one remove the rear seat of a 92 dynasty? I need to remove
> the rear deck carpet to get at the speakers.
>
> Thanks!
>
> GR