Does anyone know where the blinker relay switch is on a 2000 GMC Jimmy? I know it is bad but I just don't know where it is, and it sounds simple and really dont want to pay anyone to do it if I can myself.

Locate the fuse box if its the same as the UK models it'll be a drop down flap beneath the dashboard to help you locate it turn the ignition on and turn the blinker in the direction that works there is always a chart showing what relay does what in the fusebox or on the cover. If your hearing is good you can hear the relay clicking regularly and locate it that way
Do not replace it if one direction is good and the other is fast /slow or non op
Replace ONLY if the flasher speed is over 100-120 flashes per minute and replacing the fuse (if fitted?) does not restore life to a non functioning relay
Clues Look at the lights "speed" on the dash
This is a Blown bulb or in a really neglected vehicle, a bad "EARTH"/Ground. The Former is the likely cause Then you'll need help to restore power if its the Latter that's causing the issue

if you have the owners book look in there
you can also find it on the web.
should be in the lower dash some where by the fuse,s

Maybe you just need some blinker fluid

http://kalecoauto.com/index.php?main_page=product_info&cPath=2&products_id=6

Thanks for the blinker fluid idea...but it was fullv So then I checked the Kunuter valve and that was not it either so I just traded the dang thing in