Pilot nav SIDs are clearly labeled as such, in the title on both NOS and Jeppesen plates. Not that you could get confused. Pilot nav SIDs usually have a fat slug of type describing the various courses and altitudes the pilot is supposed to fly. SIDs are really pretty simple. There are a few traps to worry about, however.
Many airports have several SIDs for the same runway and pilots have been known to fly the wrong one.
Watch out for expired-plate syndrome, too. Altitudes, courses and frequencies on SIDs change more often than you might think. Expired plates just won't hack it. The gradient may be necessary for terrain clearance or to meet an ATC crossing restriction. If you fall short of the gradient, you could become part of the local topography or, at the very least, get spanked by ATC for messing up the departure sequence.