The car died a week ago - just went dead when I stopped at a light, but I reset the battery and everything came back on and the car was running fine.

Went to start this morning and nothing. Took the battery out and replaced, still nothing.

Any ideas? Could it be the ECU?

I have an 08 Cobalt with almost 30k miles in it.

 

check all electrical connections. especially the one to the starter. <- that was the problem with mine when that happened

 

no security light or anything? ignition switches are common on these.

i'd say take it in for warranty anyway

 

Wont turn over at all (No clicking from the starter selinoid) or
Will turn over but wont start running ?

 

warranty

 

I hear a click but it won't turn over. No power at all, no lights, radio, air, etc.

 

What he said. **** it man, let someone else figure it out and pay for the parts if you ain't gota

 

In the fuse box under the hood press down on all the relays gently while trying to wiggle them to make sure they are seated fuses as well.But mainly the run crank relay.

Check your groung cable connection in the trunk also where it connect to the body of the car.

 

dude call that 1800 number they will tow it for free and fix it...