Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Is there a Aftermarket Alarm or any Aftermarket Equipment Installed (remote start, 2 way radio, Stereo, DVD, etc)
Does the Factory PassLock symbol light up on Gauge Panel & stay on or flash?Have you triedDisconnect the Battery & briefly touch the 2 cable ends together?
When the Remote Start was installed, they typically use a DATA ByPass that ties into the BCM to Start the VehicleThis DATA ByPass will also affect the Locks, Factory Alarm & other componentsTypically when there is Transmission Service done, the Battery is disconnectedWhen the Battery is disconnected, this can erase certain "memorized settings" in Aftermarket Equipment & also Factory SettingsIF you have tried the Battery Disconnect above, then I would contact the Remote Installer & see if they can RESET the DATA Module.Otherwise use of GM Dealer Scan Tool is needed to pinpoint the issueBe sure to bring ALL Remotes