I finally got a chance to put in the side markers from IND. I got the gloss black finish with the matte black inside and medium tint LED covers. Here they are (before and after) on the Monte Carlo Blue.
Sorry for the not-so-great pic quality... I took them on my Blackberry phone, the car was dirty, and the sun lighting wasn't the best.
The installation was pretty easy... as stated in the previous posts, taking the OEM chrome side grills out was a little difficult, but once they pop out, they are out. It does seem like the tabs were going to break, but they didn't.