The rigid brake lines are fairly "bendable", and you should be able to gently bend it out of the way to allow the cam-bolt to pass by it. Just don't get crazy and kink it.
Yet another example of "assembly line" forethought. Clearly there wasn't much discussion about access clearances for future maintenance/repairs. The manufacturer's goal is to get the vehicle assembled as fast as possible and be capable of reaching full term...36K miles or 3-years. Most new vehicles use TTY bolts, snap-lock fuel fittings, and many other little tricks to save a minute here or a few seconds there. I assume this is also why there are no zirk fittings. Actually repairing & replacing parts like this is just plain crazy. By the time this part wears out...you're supposed to trade the truck in on a brand new vehicle! Shame on you!
BTW...You'll have the same situation if you ever try to remove the left-rear leaf spring from the frame. GM installs the mounting bolt from the inboard-side out...and then installs the fuel tank right on top of it. So you have to drop the tank to get the bolt out. (or do what I did)....Cut the head off the bolt and install a new bolt from the outbord-side in, the way it should have been in the first place.