breaking problems

I've got a 2000 sunfire that when I break it feels like I am pumping the break pedal. I had the breaks serviced about six months ago. Any ideas on what could it be?

I have a 97 and I had that problem before and found that my back brakes had small cracks in them. However, I've been havin that problem again but I didnt find cracks or anything else. I would check for cracks first before anything. If you find out whats wrong let me know cause I can use some help too.

Start by checking your brake fluid, make sure it isn't low. Did this problem just start? Also, check for leaks in the brake lines.

get your rotors checked, they may be warped if they are they make that pumping feeling

rotors in those cars warp quickly its a good idea to spend the extra money to get vented front rotors at a perfomance shop they last twice as long. Or take it back to the shop they may have put the calipers on with a brake line twisted