I am of course a fan of the GM guard, btw the last three guys who stopped me in a parking lot (happens every day I drive this rig, to be honest - you guys know what I mean) specifically asked me about the guard too, did it come like that, they would buy an Av if it did, etc.
anyway, on the install, it can go rather quick if everything lines up for you. Do NOT do what I did (and I know better too!) which is to blindly rely on the measurement that the instructions give you for locating the holes you have to drill - do yourself a favor and actually measure the distance between the centers of the "through bolts" that will need to penetrate these holes you will be drilling - make sure they are not bent out of measurement, if so use friendly rubber mallet on the iron piece that they are located on to get them near the proper distance apart - and use THAT measurement, divided by two, to locate the centers for the holes you drill foo of the center of the front bumper, into the bumper cladding and into the thick metal "crash bar" that lives behind the cladding. I relied on their number in the instructions - was waayyy off and had to engage in a combination of rubber mallett work and slight hole relocation.
You will need a hole saw, which if you never used one is not a saw at all but a drill accessory, readily available at Home Depot, etc. I space the exact size, but I do know that it is not the same size as your standard home door handle cut out - it is a slightly larger size so you will need to get the right size even if you think you have it covered already from your on-hand tools supply. And you will also need a rather large drill bit. Both are specified in the directions that come with the unit, which, like all GM shop directions, are not great but adequate.
pm me with specific questions on the install, happy to walk you through it or address any issue that you encounter. I went with chrome, but somewhere else around here I saw that other finishes were available.