I removed my air dam today on my 2016 Colorado, took me about two hours total. You will need a 1/4" drive ratchet with 7mm and 10mm socket, and a t10 torx socket. There are 6 torx screws in each wheel well liner to be removed, so that you can access the fender screws. 6 torx screws in the top of the grill, two 10mm screws in the front of the bumper recessed. Three 7mm screws holding the bumper to each of the fenders, and four torx screws on the underside of the bumper. You do not need to take the headlights out for this, there is a how to video on YouTube that details this more if you don't like this post lol!