Long story short, if you ever successfully completed the little kids "shape-sorting" toy you can easily do the ZL1 front bumper change. Its all plug and play, besides the wire harness for the fog lights.
and if you never successfully finished it, there is no reason to worry about the ZL1 bumper either, because you have much bigger problems than changing the front bumper on you car
Kidding aside, good luck with the change, it will look great
this might give you some visuals also:
http://www.superchevy.com/how-to/pai...s/viewall.html