10si alternator issues
 

https://cimg5.ibsrv.net/gimg/www.gmf...644d1a1e6d.jpgCan anybody tell me what this is?
https://cimg7.ibsrv.net/gimg/www.gmf...befe9daded.jpgThis is where it was in my alternator

It's a diode to prevent voltage from back feeding the ignition system so when you turn the key off, it doesn't keep your car running.