I'm with the tow people on that one, man.
I'm of the opinion that a sealed brake system shouldn't loose pressure or fluid.. so if your brake fluid level seems to be dropping, and the truck is just sitting there.. that means the fluid is going SOMEWHERE, right?
Ok.. so if it's going to vanish with the truck just sitting there.. whats going to happen when you put some PRESSURE on those lines?
Murphys law says you'll find out.. right about the time your rolling up on a red light doing 35 MPH going downhill.
Brakes aren't any place to roll the dice, my man.. bite the bullet and find somebody to tow the truck to it's new home, and don't put the truck on the road till you have the brakes fixed, and fixed right.
If you can't afford to pay the $50 to $70 it costs to get it towed, you probably can't afford the lawsuit you'll be facing if you take out a busload of nuns while blowing thru a redlight.
An alternate method would be to use tow chains, and pull the truck home.. that way, if the brakes do happen to crap out, the only thing the truck will be slamming into is your own tow vehicle.. and if you tow it with something that the bumbers line up with decently, the damage wouldn't be that bad, if at all.
