Fasten Safety Belt Indicator

WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

The instrument panel cluster (IPC) illuminates the fasten safety belt indicator when the following occurs:

The IPC detects that the driver's seat belt is unbuckled. The IPC illuminates the indicator for 20 seconds and then flashes the indicator for 55 seconds. The IPC activates the audible warning for 8 seconds or until the seat belt is buckled.
The IPC performs the displays test at the start of each ignition cycle. The indicator illuminates for approximately 3 seconds.