@JRMunn, I'm getting braking power only if I pump the brakes 5 or 6 times. It doesn't seem to be making any hydraulic pressure. If you stand on the brakes The truck does start to come to a stop but it takes a while.

I figured that I would start with the master cylinder because its the cheaper option. All of the other components seem fine as far as the wheel cylinders are concerned and there are no leaks in any of the lines. Since the boosters cost 2 times as much as the master cylinder, and there are two of them I figured I would start cheap. Either way at least I will know all of the brake parts are solid.

@3B, I think that is the part I found and put on order. I will keep you posted.

@Mike B, Thanks! I'll set it up!


Fixing up a 1972 GMC C5500

Follow the progress here
http://s1167.photobucket.com/user/comeaud1/library/