Owner's Manual
Page 193
... a problem is not protecting the vehicle. If this message is a problem with the immobilizer. Service Fuel System The Powertrain Control Module (PCM) has detected a problem within the Powertrain Control Module (PCM) or the ignition switch. Have your vehicle serviced by your GM dealer as soon as possible and stop carefully. Service Stability...
... a problem is not protecting the vehicle. If this message is a problem with the immobilizer. Service Fuel System The Powertrain Control Module (PCM) has detected a problem within the Powertrain Control Module (PCM) or the ignition switch. Have your vehicle serviced by your GM dealer as soon as possible and stop carefully. Service Stability...