That is how mine look. GM says that you can still brake if there is a line failure...BS. You can slow, but you aren't coming to a stop without the emergency brake (unless that is the "circuit" they are referring to... My fuel cooler is trashed also, I figure I may as well bite the bullet and have all the fuel lines and cooler replaced while I am at it. My days in the north are over (minus family visits) so not going to stress over them rusting up again. I would like for this to be my last truck, we are moving to a Class A in about 5 years.
My neighbor just picked up a Ram 2500 CTD, nice looking truck, but way too many electronics and tubes running everywhere. Just on his rear-end alone, he has more metal tubing than I have brake line tubes....unless that was done right, that will be a nightmare waiting to happen....
Cale