not familiar with your truck but if there is a pin in and it needs to come out.....well, it has to come out.
Have you tried the online manuals for any help. They may give you some help.
http://chevy.oldcarmanualproject.com/Look in the online manuals for your year. Good luck and don't give up. Someone that knows should be by here just anytinme.
If not, post a pic and maybe it'll jog mine, or someone elses, memory.
