[njsteve]

I replaced all the brake lines, calipers, and rubber hoses in the 1995 Suburban over the weekend. It took 12 hours at my buddy's shop. When we finished late Saturday night, I noticed that we must have bumped the fuel lines because several of them were wet and dripping diesel fuel. Turns out we then had to replace all of the diesel fuel lines as they had the exact same rust condition as the brake lines. On Sunday we spent four hours remaking them by hand from 5/16" and 3/8" tubing.

We had to drop the fuel tank to get to the ends where they were crimped to rubber lines for the final foot or two to the tank pickup. Those crimped ends were so fragile that if you bent them more than a couple degrees off angle, they snapped like they were made of glass. Very scary! The worst sections were where you could not see the rust on the lines.

Here is the moral of the story: if your brake lines are rusty, then your fuel lines are just as rusty if not more.