I am having problems with my braking on my grand prix(2004 Pontiac Grand Prix GT2), these are the symptoms. I did not notice a puddle, I pressed the brake down to around half an inch of travel left. There was a little brake pressure, enough to slow the car down and stop. I filled the brake fluid reservoir, that did not fix the problem, i checked the reservoir and it still had fluid in it. Does anybody have any insights? Any help would be appreciated.