GM Service Manual Online
For 1990-2009 cars only

The body control module (BCM) controls the following reminders:

Key-in-ignition reminder

An audible warning intended to remind the driver that the key is in the ignition cylinder. The BCM sounds the chime continuously.

Fasten-seat-belt reminder

An audible warning intended in order to remind the driver at the beginning of the driving cycle that the driver seat belt is unfastened. The BCM sounds the chime for 6 seconds. The fasten safety belt indicator also turns on in the IP.

Turn-signal reminder

An audible warning intended to remind the driver that the turn signal has been left on while the vehicle has traveled over 1.2 km (¾ mi). The BCM sounds the chime in unison with the turn lamps. As long as the turn lamps are on the chime will also remain on.

Headlamps-ON reminder

An audible warning intended to remind the driver that the headlamps have been left on. The BCM sounds the chime continuously.

Low oil pressure chime:

An audible warning intended to provide the driver feedback that there is low oil pressure. The BCM sounds the chime continuously. The LOW OIL PRESSURE message turns on in the IP also.

Low fuel chime:

An audible warning intended to provide the driver feedback that there is low fuel. The BCM sounds the chime 4 times and then turns off. The LOW FUEL message turns on in the IP also.