How do I remove this trim piece?

[BWG]

I have a 28.5 RSTS and need to work on the kitchen / cable slide. The bottom brackets are bending/pulling away from the slide. I bought reinforcement brackets but need to remove this trim facia to install them. Can anyone here advise me on how to remove it without destroying it?
(Sorry for the sideways pictures. Sometimes iPhones and iPads can be evil.)

[Stan&Sharon]

The item you are pointing at is called Fascia. In your 'American Farmhouse' finish I believe it's part number is N1WD0072. Unfortunately, Jayco uses a brad nailer and/or glue to attach it. It's very thin and will most likely crack if you apply any pressure to remove it.
Fortunately, since it's easly damaged, it is a commonly replacement part.
This link will route you to Jayco Parts department:
https://www.jayco.com/contact-parts/

When you describe what you need, include this link in your message:

https://www.jaycoowners.com/forums/attachment.php?attachmentid=96382&d=1733600018

[TaftCoach]

X2 on the above.

If you want to try anyway an oscillating tool with a really thin blade may be able to slide in there if it isn't glued. Glue is fast, strong, light, and cheap and used everywhere.

[Edutron]

Can buy base boards (same thing - trim) at a hardware store for $2-3 a foot or more depending on fancy.

[AZDIESELPIG]

Call and order one now.

[BWG]

Sorry it has taken me so long to reply, but life got in the way of working on the trailer and I had to set it aside for a while.
I was able to get the facia boards off without breaking anything and was able to install these brackets. I slid stiff putty knives behind the board and gently opened the gap. Whenever I found a pin nail I put the putty knife against it and hammered against the nail. That seemed to break them free of either the facia board and/or the backing board.
Again, thanks for everyone’s help.