GM Service Manual Online
For 1990-2009 cars only

The audible warnings system brings to the driver's attention one or more of the following conditions:

    • The exterior lights are ON with the following conditions present:
       - The ignition switch is in one of the following positions:
   • LOCK
   • OFF
   • ACCY
       - The left front door is open.
    • The ignition key is in the ignition switch with the following conditions present:
       - The ignition switch is in one of the following positions:
   • LOCK
   • OFF
   • ACCY
       - The left front door is open.
    • The seat belt is unbuckled while the ignition switch is in the RUN or the START position.
    • A turn signal is on and the vehicle has traveled over 1.2 km (3/4 mi).
    • The park brake is applied and the vehicle has traveled approximately 12 m (40 ft).