I just replaced the master cylinder, bled the fronts and now there is no action on my rear brakes at all. Does anyone out there have a direction they can point me in?

 

Welcome to the forum 76Fiorenzo

How about a little back ground on the vehicle...
Year
eng
2x 4x

 

hehe, I guess that would be a good idea.
1997 silverado
4x4

 

5.7 vortech
put new hubs and pads on the front now all said and done, nothing in the rear.

 

Well fluid does have to travel farther to get to the rear, are you sure you bled them enough?
Maybe go to an auto parts store and get a mighty vac, pump it to a good vacuum, then try
Bleeding 1 more time.
Also for bleeding, I find it more efficient to press in brake, open brake nipple, close brake nipple, then release the brake.
And also do not pump the brake pedal, you will turn a couple of large bubbles into hundreds of
Smaller bubbles and the smaller the bubble the harder it is to get out.

So my suggestion is to get a mighty vac, plug it in and bleed it a bit more.

 

Okay, thank you. I will try that out and let you know how it goes.