Help! How To Replace Rear Brake Line In 1990 Silverado?

[Snaffoo]

I have a 1990 Silverado and recently we noticed the rear brake line to the driver's side rear wheel rusted through and burst at the drum. We were able to replace it pretty easily, but when we started to pump the brakes, another burst happened in the line, but this time in the main rear line just before a junction point in the frame rail next to the gas tank. I can see the line and follow it to another junction point below the master cylinder, but how do I replace it given it is in the frame rail wedged next to the gas tank? Do I have to take off the gas tank?

 

Is there a DIY someone can direct me to or tell me the steps? Also, given I have had two bursts within the line, is this an indication of a larger problem or are they just rusted, which is what it looks like?

[Guest Riggs]

you can usually cut it before and after the gas tank and then rip it out... and the new one is sturdy enough to get it in the clips. i did on my old truck..

 

i also had one burst on my new truck after a car wash and but it was only the section that goes into the little maze by the rear diff and everything else is like brand new... IDK why but thats what happened...

[[email protected]]

Would it be a problem or make it easier to raise the bed 6 inches by placing wood blocks on the frame to hold it? I have the same issue and with the bends and the middle curves where it passes between the bed and the cab, i wonder if I could get better results and actually save myself some headaches by lifting the bed a little first? I would appreciate feedback from anyone who has tried this.

[minibike132]

I always lift the bed off on these. I'm going to legally cover my ass and say don't just shove blocks under there, take it all the way off. I take mine off with the lift and it's designed to lift the whole truck so I don't think I'm in trouble. Be safe, but yes lifting the bed off is the easiest way. By the way this is the line that always is the problem in the same spot. I think I've done 5 lines in the last month or so and all for leaks in the same place. Things get in between the bed and cab and stay there. That rots out the line. Mulch is the worst, do yourself a favor and when your pressure washing your truck save yourself $500 or an afternoon if your doing it yourself and pay some attention to getting salt and any debris that spilled over the bed out of that area.