Thread: 2002 Grand Prix - Right Rear Brake Leak

The only thing that comes to mind based on what you are describing is the bleeder valve and that you can just grab a wrench and tighten down.

If you give us a better idea as to where exactly this leaking part is located you will most like get some more helpful responses.

I bet your talking about the proportioning valve. Its on the line, its kinda brass looking before the caliper, correct? If so thats the rear proportioning valves, you have them on both sides. They do go bad and will leak, I had to replace the drivers side on my 1999 GTP. There easy and fairly cheap to replace. Its a dealer item only as far as I know. Just break free, pull out, install the new, and bleed that line of air.

^ exactly the part i was thinking too i didnt know the name of it though. I too just did one recently on the drivers side. i bought one at the junkyard for 20. had to show the guy on the junker car exactly what i wanted cause he couldnt figure out what i was talkin about even when i took him out an showed it to him on my own car. you may end up having to replace that section of line as well. i did because the connectors were stuck in the valve an i couldnt get them out but it was an easy job as Iron Indian said.

I think it was like $20-$30?? Something like that, not too bad really. I recommed soaking both ends with PB Blaster before trying to undo the lines. For an ex Michigan car, it came off very easily on my car. You'll loose a little bit of brake fluid, not much though.