2005 Chevy Cheyenne Starter and Park Safety switch

Hello and good morning

I've never used a question answer site so I thought I'd give it whirl. The starter on my truck didn't crank so I pulled it and did a bench test, it passed with flying colors. I reinsalled it and it worked fine for a couple of days, but it doesn't crank now.

Could this be caused by the relay in the Park positon indicator? Or is it an intermitent starter or is there somthing else that could cause this problem?

Thanks
Herb