Low Brake Pedal

[Ron6519]

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

 

[Ron6519]

Found the problem. Seems there's a rotted line spraying out brake fluid in a fine spray. I'll evaluate all the lines tomorrow, deciding if I can do a patch or need to replace all the lines.
I see copper, steel and stainless are available. If only a patch is needed, I'll probably go with the steel to avoid dissimilar metals in contact with one another.
Any recommendations for whole line replacements?
Anybody have a source for the pre-bent/flared kits for this van? I see them for other vehicles older then this, but none for the 2001 GMC Savana van.
Thanks
Ron