2006 Cobalt battery went dead, jumped it and got charge, no start

A battery indicating only 5.6 volts will never start that vehicle. Battery voltage should at least be 12.3 volts if you want to reliably start the car.

on a lot of these late model computer base cars when battery power get low the computer gets confused. try this disconnect the neg. battery cable. charge the battery. reconnect and try again. my son cobalt battery went bad key was stuck in the igntion. good luck.

Is the battery dead? Check your battery condition and connections. Check your starter fuse from there. Check the connection to the starter then progress to the ignition side of the concern

sounds like ignition key cylinder is bad have to get a new one from dealer with vin

It sounds like the alternator is weak or has gone bad, if you can jump start it take it to your local auto parts store and have them test alt/charging system. Lights & fans don't draw that much power but windows and locks require more. Sounds like you've been running on battery power from 12/8

2006 cobalt won't start after a severe thunderstorm. Battery was check and is good, light turn on, turns signals work a/c blower works, however, radio does not.Doesn't even click or turn over. All seniors check out. What's the problem?

turn key to on and make sure car is in PARK.

Sounds like your battery is dead. Most batteries last about two to three years. I suspect maybe yours has a couple of dead cells. You will need a hydrometer a device we use to test each cell. When you pick one up at the parts store pry open the caps off of the top of the battery. Next squeeze and hold the bulb on the hydrometer and stick the meter into each opening in the battery and release and make a notation of where the little ball in the meter is located. This will tell you that you have one or more cells dead and the battery will need replacing. Good Luck.

The main problem could be a well known cobalt ignition issue. check all fuses, wires, and connections if you've worked on cars before and call to see if you still have any warranty left. This should be handled by a chevy dealer or chevy trained mechanic...to isolate the issue fast and avoid repeat visits to get er done.

Can you turn on the lights? If not, then the battery is dead. Time to get a jump.