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Help Replacing Brake Lines


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Posted

I bought a 94 GMC K1500 4x4 about a month ago. When I had it inspected they said I needed to put on a new brake line(the one that runs from the rear up by the gas tank and to the front) because it had a quick connect or pressure fitting put on it. I think I found the pressure fitting right beside the gas tank on the frame rail. Do they make a stock replacement for the line or do you have to buy it and cut it, etc. Any help or advice with doing this project will be greatly appreciated!

Posted

Usally you have to buy line, fittings and then bend and flare it , unless the line is a super special one that you can buy, even the dealer guys have to make thier own.

 

Your best bet, pull the bed and replace all the lines and wheel cylinders now. it will be a good weekend project. Here in the northeast, your in the time frame for brake lines. You may want to take a good look at your fronts as well, and consider rebuilt calipers. Again, after 11 years of heat on the rubber parts, they might be in need of some work.

 

You will need to buy a brake flaring tool and a mighty mac vaccum pump to bled the lines out.

 

Once your done, with fresh clean brake fluid and new soild parts, all will be well in the braking world.

Posted

Actually, some of our older trucks had a coupling in the line to the rear from the factory. But it was a fitting that accepted two flared lines. Those compression fittings, the one that uses a little brass ring that's compressed to hold the line, are a big no-no on brake lines.

Posted
Actually, some of our older trucks had a coupling in the line to the rear from the factory.  But it was a fitting that accepted two flared lines.  Those compression fittings, the one that uses a little brass ring that's compressed to hold the line, are a big no-no on brake lines.

 

 

 

Posted

Thanks guys for the info. Yes it is a compression fitting. I didn't put it on but I will be taking it off. Just replaced the right rear wheel cylinder yesterday. Left one isn't bad. Do you have to single or double flare those brake lines?

Posted
Thanks guys for the info.  Yes it is a compression fitting.  I didn't put it on but I will be taking it off.  Just replaced the right rear wheel cylinder yesterday.  Left one isn't bad.  Do you have to single or double flare those brake lines?

 

 

 

On a '94, hey are all double flares. Single flares have a tendancy to crack

Posted

Just another note, pay close attention to your fuel lines, especially in the area near the fuel tank, where they follow the frame and bend up toward the tank. If they haven't already been replaced, there is a good chance that they may start to leak after you start moving them around just a little. If that is the case, you may as well consider replacing them at the same time, and be carefull of the fuel sending unit lines, they are just as vulnerable. I just did this job on my '95 earlier this year. I was replacing the fuel pump/sending unit, then just bit the bullet and replaced the tank, brake lines and fuel lines. They use some nasty crap on the roads here in Western NY in the winter that plays havoc on unprotected metal. :confused:

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