93 W350 dually 4x4. Just did new rear drums & front and rear brakes. It stops great now. But, when I am sitting at a light with my foot on the brake, the pedal slowly continues to depress. Is this normal? It did this before I did the brakes also. Thanks

 

sounds like a bad master cylinder

 

I don't think it's normal. My truck doesn't do it, never has as long as I've owned it

I've heard it can be the RW ABS pressure regulator valve on the rear chassis right above the driver side rear wheel. I would also check other typical stuff. MC and stuff like that. I'm sure something is causing it. Sorry I can't be of any real help

 

Mine has been doing that too. It all started when I changed the front pads and rotors. I changed the master and it still does it. I can't figure it out - let me know what you find out.