ok, rear bumper:
You'll need a 10mm deep well ratchet, a phillips screw driver, and a flat head (or two) or a trim pulling tool.
There are 3 10mm bolts on each side on the inside of the trunk. Might be helpful to remove the power antenna while you do this to get to the last bolt, your choice. There are up to 3 phillips screws in each wheel well. might need to remove the wheels if you don't have an bent screw driver. there are 4 phillips screws to remove the cover panel on top of the bumper by the trunk. under that, there will be up to 5 push-in plastic pieces, or screws, or 10mm bolts. i've seen all. there are 3 or 4 push-in plastic retainers under the rear center between the tips to pull out. Lastly, there is 1 push-in plastic retainer behind the license plate.
for the front:
You need to remove the inner fender, which is a bunch of 7mm bolts, and then a couple phillips screws. Then you have to remove 3 10mm bolts from inside. This is usually tough if they have rusted. I have fought a lot with these bolts. There is the possibility of breaking parts. I have hoped to break the heads off the bolts when doing some very rusty ones. You then need to remove the lower air dam. may not have to though. then there will be two push-ins under where the front plate would mount.
hope that helps
2007 Saturn Aura XR | 1970 Chevy Blazer 4x4 | 1970 GMC 3/4 Suburban 4x4