07 Cobalt Engine won't turn over after coolant issue

[hailstorm]

Hi everyone!
Looking for some help with my 07 Cobalt. Several days ago, it started overheating. I added more coolant and that didn't fix the problem so I installed a new thermostat and that cooled it down. Since then, I've been able to drive it several times. But this morning the engine won't turn over. I get a check engine light as soon as I start to turn the key and the engine tries to start but I can't get it to go over. Any suggestions on what it could be?

 

[YelloEye]

Is it cranking? Or acting like the battery is weak?

 

[hailstorm]

Its cranking. I can hear the fuel injector. I figured out it isnt sparking though...

 

[YelloEye]

Still no start though?

Your ignition missile might be toast.

 

[hailstorm]

The check engine light is on but my code reader isn't picking anything up. Everything seems good fuel-wise I'm just not getting an spark. Tried a different camshaft angle sensor but it made no difference.
Any other ideas for things I can try myself or should it just be taken to a pro?
Also, what is an ignition missile? I can't find anything about that anywhere...

 

[YelloEye]

Heh.... Typo, ignition module is what I meant.

The check light is on when the engine isn't running, perfectly normal.

With the plugs attached to the coil and grounded on the valve cover is it still not sparking?