I'm Having brake problims with my 96 2500. Fluid is ok but pedal fades and some times is very hard to push down and at that point it wont stop. I pulled the vac line to the brake booster and that has very little suction. What should the vacuum be at the brake booster?.. Can you help.. I'm assuming that the vac. pump is at the opposite end of the line to the vac. booster..

Thank's for your help.. Mike

 

Check for a leak on all the small lines