1988 Door panel removal HELP

I am working with a 1988 GMC truck. I need to get the door panel off. I have everything off but the handle for the window roller. Do I need a special tool to remove the handle? Or do you have to pull that cotter pin thing? I just dont want to break anything.
 
Thanks

There's a nice simple tool that will help you remove that C-clip. You should be able to get it off without it... but maybe not without swearing up a storm

GM Window Crank tool



-- Rick

I was able to get the pin out. But now I cant take the door panel off. Its hung up at the top of the panel. I dont know that the deal is.
 
If anyone can help out let me know.....
 
Thanks