I need help on how to pregram this extra remote for my 2000 blazer.

Hello, and welcome to Automotiveforums.com

Our resident expert with keyless entrys (Tireburner) has been away for a few days, but im sure he can help. It already may have been posted too.

I suggest re-typing this post inside of this thread. http://www.automotiveforums.com/vbulletin/showthread.php?s=&threadid=8206&perpage=40&pagenumber=3

Hope this helps!!!! :)