I have searched and read on PS/Brake failure but this seems to be a bit diff then most cases.
On my 99 QC 3500 DRW's, I had a leaking Brake Master Booster inside the cab on the firewall. I purchased a new Master Booster and Installed it. Install was not bad at all, not many hard lines to move. Completed per manual states. When 1st went to move all seemed fine, but when turning the wheel near complete lockout the brakes would apply without touching the pedal, did this in foward and reverse. I checked PS fluid level which was low and emptied dirty OEM fluid and refilled with Valvoline Syn. Checked level and then all was fine.
I only drive the rig once in a while just to run her and the normal long hauls for towing the race car and trailer. After about a hour or so cummute today I returned to work and went to park in a tight parking lot. Once again when in reverse and near full lockout with the steering the truck would not move and felt as if brakes were applied. Did the exact same thing in foward also. I thought fluid may have been low again so I checked and level was satisfactory. Later the same night once arriving home the problem did not occur parking.
What could be causing this and why would it seem to be only be doing this once every few weeks or so? Thanks in Advance!
-Stephen S
On my 99 QC 3500 DRW's, I had a leaking Brake Master Booster inside the cab on the firewall. I purchased a new Master Booster and Installed it. Install was not bad at all, not many hard lines to move. Completed per manual states. When 1st went to move all seemed fine, but when turning the wheel near complete lockout the brakes would apply without touching the pedal, did this in foward and reverse. I checked PS fluid level which was low and emptied dirty OEM fluid and refilled with Valvoline Syn. Checked level and then all was fine.
I only drive the rig once in a while just to run her and the normal long hauls for towing the race car and trailer. After about a hour or so cummute today I returned to work and went to park in a tight parking lot. Once again when in reverse and near full lockout with the steering the truck would not move and felt as if brakes were applied. Did the exact same thing in foward also. I thought fluid may have been low again so I checked and level was satisfactory. Later the same night once arriving home the problem did not occur parking.

What could be causing this and why would it seem to be only be doing this once every few weeks or so? Thanks in Advance!
-Stephen S
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