2000 Blazer. My wife noticed that the drivers door was not closing correctly. Upon investigation I noticed The lower hinge pin was pulled out a little. Took a hammer drove it back in. Do GM garages stock this part? Thanks

yes gm has replacement pins but they will charge more for them.
use these:
http://cgi.ebay.com/ebaymotors/95-03-S-10-Blazer-Jimmy-door-hinge-pin-repair-kit-pins_W0QQitemZ220166172540QQihZ012QQcategoryZ33642 QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
they are of better quality then the stock pins and are cheaper than the dealer's price. i used them for both of my front doors.