They just pull right out from the front. They are hard to get out for the first time, be careful, there are plastic clips that hold them in. Theres videos on youtube if you want something for reference.
like said, just pull them out, put all you fingers through the grills spead out to spread the load, and PULL. the chrome it really easy to separate from the honeycome as well, from the back side of grill, stick a flat driver between the chrome and the black, then turn it till it pops, do that a few times around the grill and it will slide appart.