RE: Silverado Brake Problem - Low Pedal
Here is the lame reason that I had the same problem. There is an STB on the parking brake which states that the parking brake pushes the pad against the rotor 24/7, running or not adding that the result is a weak brake pedal. They wanted $300 to fix until I called GM's complaint line and was directed to another local dealership who replaced the unit and my problems went away. There was also another STB with concerns reflecting an issue with 99-02 1500s ABS system. The dealership that I went to for the parking brake issue replaced something related to the ABS system as well. I have had no problems since 2002 after getting GM to stand up and fix an extremly dangerous issue. I urge you to look for your STBs as many will be addressed by GM even out of warranty.
Don't Sweat the Petty Stuff - Pet the Sweaty Stuff