I just changed the steering colum on my 08 HHR and it started one time but showed a car with lock on the dash and now wont start at all. What did I do wrong?

 

The immobilizer is now ingaged if you didn't install the ignition that came with the vehicle you will need to have a chipped key cut to the ignition

 

anti theft. Your ecm needs to be trained to accept the new keys. First insert the original key and turn it to the on position. Do not crank it.turn it back off and immediately insert new key. This puts the car into learning mode. Turn it back to the on position and start a timer for 10min. At the end of ten min, the car with the lock icon will go off. Turn the key off all the way and immediately turn it to the on position again. Start timer again10min.antitheft light will go off. And one last time, all the way off, immediately back to on position for a Total of 3times. keep us posted and good luck