Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
Hi there, I am Cam. Can I get your first name please?I am sorry to hear about this. IT sounds like your theft system is active. Can I ask if you have tried a second key yet? IF so, then we need to perform a relearn.
Turn the key on and attempt to start the car, It may crank, it may start and stall or it may do nothing at all, this is fine, still cycle the key to start then release the key back to run. Wait 10 minutes with the key in run. The passlock light should be flashing and the DIC will say "Service Vehicle" or "Security" or have a picture of a car with a lock during that 10 minute span.After 10 minutes has passed, turn off the car, count to 10, and try to start it again and release the key back to run.Wait another 10 minutes.After 10 minutes, turn car off 10 seconds and try to start again and release the key to run.Wait another 10 minutes.After 10 minutes, turn car off 10 seconds and try to start again.It should start up this time. The passlock has been learned.
During this process, turn the fans off, radio off and cycle the headlights off so the battery will not go dead. If needed, use a battery charger.
Can you try this and see what happens?
Ok, this may be a deeper issue. Possibly the ignition switch assembly or even the Body Control Module (BCM). Do you have the means to check codes in the system modules?