GM Service Manual Online
For 1990-2009 cars only

The driver's seat belt system includes a seat belt switch in the driver seat buckle-side belt which controls a reminder lamp and a tone alarm.

  1. When the driver's seat belt is buckled, the driver's door is closed, and the ignition switch is turned ON, the following events will occur:
  2. • The tone alarm will not operate.
    • The reminder lamp will operate for 4 to 8 seconds and then go OFF.
  3. When the driver's seat belt is not buckled, the driver's door is closed, and the ignition switch is turned ON, the following events will occur:
  4. • The tone alarm will operate for 4 to 8 seconds and then go OFF
    • The reminder lamp will operate until the driver's seat belt is buckled.