That happened to mine, up here near Saratoga Springs, NY. If you replace with factory hoses and plan on keeping
for a long time, it'll just happen again. I replaced with 3/8
nickle/copper brake line, used my hydraulic brake flaring tool to make hose barbs and fitted oil resistant braided
hose with crimped SS Oetiker clamps to make transmission hoses to last the life of the truck. Also
made new Ni-Cop brake lines with the hydraulic tool
because brakelines failed. If you're in Western NY,
not a matter of IF, but WHEN your brakes will fail, so do them when you can. If you can't afford a shop to do this, like me, the Mastercool hydraulic brake flaring tool @
between $280 to $400 will more than pay for itself.
Ni-Cop is easy to bend, especially when using
stainless brake shielding coil over the brake line when installing.
Stephen