I installed my ZL1 rear splash guards on my 2013 1LE last night with a little twist.
The factory install requires rivets to attach the splash guards to the rear fascia....I prefer to utilize something that can be removed at any time and I did not like the view of the unused hole from the back of the car.
I got some OE Push Screw Clips made from black Poly Pro (used for trim pieces, splash shields, fender liners ect) and decided to use these to hold the ZL1 splash shields in place. when the screw is inserted the clipd expands. These are removable, they unscrew, will not rust, corrode fall out....and are very light weight
I did find that the holes on the splash shields varied slightly in size, especially the second from the bottom, so I cleaned then up with a small razor blade (drill bit would have worked too)
Pictures speak a 1000 words....
-Matt
NOTE: I will gladly send you some if you cover S&H. PM me.