Vent cover on 98 GMC Jimmy

Does anyone know how to remove the defroster vent cover on top of the dashboard on this vehicle. Its so close to the windshield I can not tell where/how to pull it, I am sure it is only clip secured, but one part of the grille is already broken I believe to someone trying to open it and I dont want to break anymore. I tried looking in the owners manual, didnt find anything… I have a repair book, still didnt find anything… Any way I can grab this safely, or do I attempt to pry it up with a flathead?