2007 cobalt will not start or turn over. key

Question edited for clarity.
Question moved to model category.

Chevrolet 2007 Cobalt Owner's Manual [Page 190]

ManualsLib https://www.manualslib.com > ... > Owner's manual 1. Turn the radio on. · 2. Press the clock button and the HR, MIN, MM,. DD, YYYY (hour, minute, month, day, and. year) displays. 190 · 3. Press the pushbutton ...

Chevrolet Cobalt Owners Manual: Setting the Clock

CheviGuide https://www.cheviguide.com > cinfo-1319 1. Turn the ignition key to ACC/ACCESSORY or ON/RUN. Press O radio on. to turn the · 2. Press begins flashing on the until the hour begins flashing on the · 3.

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remove the physical key? or make the IMMO lamp happy the lamp tell you good or bad.
what is stuck into what.?
door
ignition key slot.
does ignition key turn in slot? to run?
if Securty lamp glows it will not start. the engine.
the came with 2 keys that work, try the 2nd yet.?
the glove box users guide covers all this, I will paste the page link now
IMMO is called PASS-KEY-III+
page 94 (pdf) read
here free


https://www.manualslib.com/manual/27233/Chevrolet-2008-Cobalt.html?page=94#manual

Hi there all the things you explain are and need power to operate, make sure your battery has 12.6 volts or more and try again , if your battery doesn't have that voltage then you will need a new battery, hope this helps

problem in theft security system it has to be reprogrammed to new key new ignition switch key lock system. dealership fix need diagnostic eqquipment to reprogram new ignition key and ignition switch lock cylinder to the immobilizer control module and ECM.

This can happen if the battery is low / dead. To solve, connect a set of jumper cables between the battery in the Cobalt and a running car's battery. Shut off the running car. In the Cobalt, make sure all accessories (lights, radio, fan, etc.) are off. Step on the brake, then move the gear shifter fully into the PARK position. Next, either attempt to start the engine, or turn the key to the OFF position and remove it from the ignition.

I hope this helps & good luck!

pop your ignition out and tap it on a counter top or desk.

There is a TSB on this issues if your having ignition lock issues.
Service Information
2009 Chevrolet Cobalt | Cobalt, G5 (VIN A) Service Manual | View All Bulletins | Document ID: 2325129
#09-02-35-005: Ignition Key Difficult to Remove, Ignition Key Binds or Sticks in Cylinder (Replace Ignition Cylinder) - (Aug 10, 2009)

Subject: Ignition Key Difficult to Remove, Ignition Key Binds or Sticks in Cylinder (Replace Ignition Cylinder)

Models: 2008-2009 Cadillac CTS (Built Prior to VIN Breakpoint 90163371)

2005-2009 Chevrolet Cobalt (Built Prior to April 14, 2009)

2006-2009 Chevrolet HHR (Built Prior to April 14, 2009)

2007-2009 Chevrolet Equinox (Built Prior to July 2008)

2005-2006 Pontiac Pursuit (Canada Only)

2006-2009 Pontiac Solstice (Built Prior to April 14, 2009)

2007-2009 Pontiac G5 (Built Prior to April 14, 2009), Torrent (Built Prior to July 2008)

Attention: This bulletin only applies to vehicle equipped with automatic transmission.

My cobalt turns over but doesnt start up and i dont know whats wrong with it to get it fixed.

linkage needs replaced

I found this on a website try this

1. Put the newly cut Master key into the keyway and turn it to the ON (RUN) position. A "security" indicator
light on the dashboard will stay on for 10 minutes.
2. Within 1 minute after the indicator light goes off, turn the ignition to "OFF", then return to the ON (RUN)
position. The indicator light again will stay on for 10 minutes (Do not remove the key.)
3. Again, within 1 minute after the indicator light goes off, turn the ignition to "OFF", then return to the ON
(RUN) position. The indicator light again will stay on for 10 minutes. (Do not remove the key.)
4. When the light goes off the third time, the new key is programmed into the computer and will start
the car. Remove the key and then re-insert it into the ignition lock and start the car.
All previously stored codes will be erased. To stop the process at any time, simply remove the key and use
an existing key to start the car.