I believe it is a 10mm nut on the bolts that hold the cladding to the
clips.

I used a small socket with an extender to remove/replace my cladding.
You will then be faced with removing the plastic vertical clips/holders
that are riveted to the body.

-john

On 11/20/19 12:38 PM, John H. Lauterbach wrote:
> My '91 GL only has part of the orignal GL panels still attached, and some of
> these are loose.  How do I remove them.  I doubt that I will replace them after
> I send van to body shop for restoration.  I will likely go back to non-GL
> bumpers.
>
> John