"2003 Chevy Impala won't start". Car would not

Call a Chevy dealership, ask for service department. Tell them about it and ask what you have to do to get the code. Also if it is n9ot a code then they may be able to help you out by giving you some suggestions, other than bringing it in to them.

Either the chip in the key has failed, or the sensor in the lock cylinder.
You can try a spare key to knock that off the list of possible causes.
Until the PASS module sees the right chip in the key, the car will not crank or start.

try it with the key in acc position you might have a bad brake switch or bad release solenoid

Click this link below and follow the details,to troubleshoot the problem.:--

http://technoanswers.blogspot.in/2012/02/car-starting-issues.html

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Thanks.

Hey there. Still trying to get use to this new account. Your hot side battery wires, one leads to the alternator and the other leads straight to the starter motor. It is located on the bottom front of the engine. Make sure you disconnect the battery first. Before you change it, make sure the ground wire is grounded. It may be the issue. If it is, replace the starter motor.

turn on your car and remove the ground cable from the battery, if the car dies it's time for a new alternator, if not take your battery in to be checked. The other message(traction control) may be just due to a faulty battery/alternator.

I have a 2004 impala that did the same thing..the ignition switch needs to be replaced

Does this car have any electrical power? Check the 'Main' fuse in the box under the hood. It could also be listed at 'BATT' or 'ALT' fuse. If the car has no electrical power and you know the battery is good, make sure the cables aren't hooked up backwards. Try these things and let us know if it works.

These cars have a shifter lock that is integrated with your brake pedal. The solenoid should release when your pedal is depressed.Check to make sure your fuses are good first.

neutral safty switch is out of adjustment!!!