the piece where it says alero above my license plate rattles like crazy any suggestions on how to stop these rattles

use the search button dude there are a billion threads about this problem

expanding foam!

Dynamat.....lots of it.........i also shoved a little piece of a dowl rod up next to the license plate light bulb housing...it put outward pressure on that piece so it didnt rattle...it worked great and only took like 5 mins to do

dude I drilled hole into the back of my trunk. put carriage bolts through your top license plate holes in the back of your trunk lid and tighten with wing nuts...

lol, that's awesome man, with the carriage bolts. hadn't even thought of that.