Hello friends. I have a 99 Grand Prix GTP with ABS. Recently I have been noticing that when I am stopped sometime at a light or stop sign that while I'm holding the brake, the pedal slowly goes down to the floor. I pump it a couple of times then it is OK til I take off. I was wondering if this might mean that my master cylinder is beginning to die or if this is an issue with the ABS system. My ABS light has been on for quite some time because of the usual problem probably with the wheel sensors but I have never had a problem with the brakes. Just wondering if anyone knows if this means I need to change the master cylinder and if so, what the procedure is when bleeding your brakes that are equipped with the ABS system. Thank you very much in advance for any help.
