Fasten Safety Belt Warning

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The body control module (BCM) senses that the driver's seat belt is not buckled and the signal is low. The BCM sends a class 2 message to the IPC requesting illumination of the seat belt indicator. The BCM seat belt chime sounds at the rate of 50 pulses per minute, slow rate chime, for a duration of approximately 6 seconds. The fasten safety belt warning sounds and the seat belt indicator illuminates when the following occurs:

Ignition switch transitions to ON.
The seat belt switch signal to the BCM is low.

If the seat belt is buckled when the ignition is turned ON, the chime will not sound. If the seat belt is buckled while the chime is sounding, the chime stops.