Have a 2001 2500 Savana van with a 5.0 liter engine with about 100K mile. Had a panic stop with the accompanying anti lock shutter and then the pedal went soft and bottomed almost out. There was an associated loss of braking. I pulled over to check to see if there was any brake fluid leaking out. There wasn't any leaking. Replaced a leaking rear wheel cylinder last year, but the brakes have been fine since.
All the way home I had to pump the brakes to keep the pedal up.
Pads and shoes are fine.
Any suggestions would be appreciated.
Thanks
Ron

 

Old stuff, as I am not sure about a 2001, but this sounds like the proportioning valve in the master cylinder

 

Turns out there was a spray leak in one of the steel brake lines. Will replace those and see if the issue is resolved or I need to look into the proportioning valve.
Thanks

 

A Good inspection ... we need to resort back to the basics...
INSPECT. INSPECT. INSPECT.....
glad you found what was more than likely your problem
keep up posted.. as what you find out after the replacement .

 

[QUOTE=Ron6519;346650 There wasn't any leaking. .
Any suggestions would be appreciated.
Thanks
Ron[/QUOTE]

That was what I was going on

 

When I checked initially there was no dripping. It was only when I had someone step on the brake did I see the spray.
Now the issue is the type of flare on the line. Seems to be a single, but would like confirmation.