You would have to cut the fender liners and remove the lower bumper supports as well as clip and terminate the fog light wiring. I don't think there is anything else on the passenger side, but the drivers side houses the Washer fluid reservoir and pump. they are fairly easily relocated though. I modified mine, Dakotawilk relocated his. they make smaller tanks that you can mount remotely and still use your factory GM pump
Looks good, I actually just cut the lower valance off yesterday, I still need to make the brackets and cut that last little bit off where it mounts, I really like the middle part painted black, I will have to do that also. Good job!!!