Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
have you tried restarting ? what happens? is the security light on?
youre going to need to attempt a 30 min security relearn
Important: The vehicle learns the key transponder information and/or passwords on the ignition switch transition from OFF to RUN. You must turn the ignition OFF before attempting to start the vehicle.
this is a 30 minute security relearn and should fix that up for you
do this and let me know if it fixes that for you