Review on Dorman M630031 Brake Master Cylinder for Cadillac, Chevrolet, and GMC Models by Mark Hamblin

If you have a GMT400 you probably know the soft pedal feel! Remove the old one and install the new one. I vented it before installing; followed by a full reset of DOT3. difference between day and night. Installed on: 99 Yukon SLE 4wd, 4L60, L31(5.7), Automatic Transmission RPO NP8, GT4, G80