G6 no, completely different car.
Perhaps you meant G5, if so yes, front fenders from 05-10 on all cobalt trims and all G5 trims are the exact same piece.
---------- Post added at 03:53 PM ---------- Previous post was at 03:48 PM ----------
Oh......Just looked again....not so sure on sedan and coupe, forgot the beginning of the A pillar is part of the fender.......hmm...
---------- Post added at 03:55 PM ---------- Previous post was at 03:53 PM ----------
I can however tell you with 100% certianty that 2005-2010 cobalts and g5 any trim, will fit that body style ex: sedan or coupe. Gotta look into that A pillar form a little more.
---------- Post added at 04:12 PM ---------- Previous post was at 03:55 PM ----------
Alright here ya go, I grabbed the website for chevy and looked at both the cobalt sedan and coupe overlayed, they are identical till about halfway up the A pillar soooo.......yes, sedan and coupe of any year cobalt or G5 will have the same fenders.
If you wanna verify for yourself go to these two pages on different tabs, go to 360* pick the same color and line em up, switch back and forth to see the differences.
http://www.chevrolet.com/vehicles/2009/cobaltsedan/gallery.do
http://www.chevrolet.com/vehicles/2009/cobaltcoupe/gallery.do