95 Tahoe - no brake fluid.
 

Can't see where it went. Sigh. 40 mile flatbed ride home to work on it in th rain.

Good luck. From what I read on the diesel place 6.5 forum, bleeding those brakes with the ABS is not simple.

Check inside your brake booster.

Well heck. Found it - hard line between the front wheels.

Runs under the radiator, has about a zillion bends.

Copper-Nickel brake line is your friend... Easy bending, easy flaring and won't rust.
Just replace the entire line that failed and reuse the compression fittings.

Did the line from master cylinder to rear Tee on my SD earlier this week.
1.5 hours start to finish, and the line is routed exactly where it is supposed to be.

Amazon.com: 3/16" X 25' Feet Ni Copp Seamless Copper Nickel Alloy Brake Line 25 Foot Roll: Automotive

did I mention that you can bend it with your hands...?

I was warned in mechanic school never to make hydraulic brake lines out of copper, since it's too soft. Does the nickel harden it up enough to work reliably?

Shouldn't that problem just have emptied one half of the reservoir?

Only one chamber was empty (larger chamber, closer to the firewall.

Never heard of copper being unsuitable for brake line pressures (if that's the kind of soft you mean).
But, nickel does add strength to the copperh.
Steel has a higher burst pressure, but that number diminishes dramatically after exposure to salt, making copper nickel very popular with the ship builders.

Copper nickel costs more, which is why it's not common for OEM applications.
That being said, it has been used since the 70's on Volvo, Rolls Royce, Lotus, Aston Martin and Porsche.

Applications: Automotive - Copper-Nickel Automotive Vehicle Brake Tubing

Front brakes.
For some reason unknown to me every vehicle I've ever worked on the reservoirs are reversed... front reservoir does rear brakes, rear reservoir does front brakes.

Maybe it's a pressure thing? More hydraulic force closer to the master to give extra pressure to the front??:confused:

First roll of copper nickel I bought replumbed the entire brake system of my 94 GMC Jimmy. No issues bleeding the brakes with that ABS system.
Took most of a day to do it, but that was mostly due to the rust issues...:eek:

The problem with copper is that it tends to crack from vibration. Not sure if the nickel helps that or not

Never heard that before either.
One would think with its greater flexibility that it would be less likely to crack from vibration...
Have you seen data for that?

edit - looked around for info on the vibrational cracking, and it seems to only pop up on Harley forums.
Guess it's not everyone's favorite oil line material on their paint shaker HD's...;)
Don't think it would be an issue for brake lines on a car, as they are not attached to the engine, and generally live a pretty stable life.
Biggest concern with brake lines seems to be corrosion.