ok so ive had my 07 LS for about a year now. ive had to replace my rear right turn signal twice and just a couple days ago my right side marker went out. could i possibly have a short? or is it another one of the great electrical wonders of the chevy cobalt

 

I bought a 2007 LS brand new and have never had an issue with the lights.

 

im guessing its a short somewhere. could there possibly be water getting into your light housings? that could cause a short/burn out

 

My cavalier used to eat taillight bulbs no matter what i did. It could be receiving slightly higher or lower voltage than it should, if you're still under warranty, try bringing the car in for a diagnostic.

 

07 cobalt lt is at 48k miles and never replaced a light yet
i dont think its a common issue as i have not heard other reports of bulbs failing

 

hmmmm. ill get the diagnostics and see whats up. or maybe bad fuse?

 

my 06 has had the same lights for 3 years...but they are all LED...

My cavalier (a 94) has had one set of new brake bulbs since I have had it. (7 years now on these bulbs)
My flasher unit has gone out 3 times though. lol.