Hey guys, I just finished creating a picture illustrated step by step write up for replacing any of the bulbs in the headlight assembly of an 08-12 Malibu.
It does require at least partially removing the front bumper cover. :( But it's actually not that bad of a process once you've done it once.
Here's the gallery and instructions -
http://www.paulstravelpictures.com/2008-2012-GM-Chevrolet-Malibu-Headlight-Bulbs-Replacement-Guide/
I took 105 detailed pictures of the dis-assembly and re-assembly procedures. So just about anyone should be able to get this done and save some $$$ instead of taking it to the dealership.
I hope someone finds it to be useful.
Cheers,
Paul