Recently my brakes did not seem to be stopping the truck like they used to so I started to look around. I noticed that the vaccum hose on the brake booster was pinching shut when I stepped on the brake. I replaced the hose to see if that would fix my problem. Not sure if anyone else has had this happen but I thought I would ask.

 

When I bought my truck, I noticed that the brake vaccum line was swollen by the vaccum pump.<br>I removed the line for inspection and found that the line had been oil soaked.<br>It was an easy fix, at that time. I simply cut off the oil soaked end of the vaccum line and placed it back on the vaccum pump.<br>I have since learned that a seal in these vaccum pumps can go out allowing oil to be sucked up the brake booster line.<br><br>The oil softens the rubber line and all this may be causing your brake vaccum line to suck shut.<br><br>Rich.

 

There was a recall to add a check valve at the vacuum pump to keep oil from getting into the vacuum line and causing the exact problems described. My 96 was already done when I got it in 99 so the recall has been out there awhile. Check around for recalls - call the dealer and give them your VIN to check against any recall actions - they are supposed to keep track of recall work done.