Pac brake has been on this truck since about 500 miles, absolutely love it, never a problem, install was simple and straight forward. Made my own switch to mount on the shifter using a project box from radio shack. Works like a dream. Added benefit is I have pulled heavy over half of the 80,000 miles that are on this truck, and I am still on my original brake pads and when I checked them last week they look like they will go another 50,000 pretty easy, of course 99% of the time I have used the e-brake to get me down around 10-15 mph before I ever touch the brake pedal.