The audible warnings alert the driver of a system concern or a critical vehicle condition. The radio generates the audible warnings through the left front speaker. The radio receives audible warning requests via the class 2 serial data line. If the radio receives multiple audible warning requests, the warning with the highest priority sounds first. On vehicles with an audio amplifier, the amplifier instead of the radio generates the audible warnings and receives audible warnings requests via the class 2 serial data line. Either the radio or the audio amplifier is the chime producer. The following lists the audible warning priority and the pulse rate:

1. Fast rate chime (150 pulses per min)
2. Medium rate chime (100 pulses per min)
3. Slow rate chime (50 pulses per min)
4. Turn signal reminder (will pulse at turn signal flasher rate)

The chime producer activates the door ajar audible warning as requested by the instrument panel cluster (IPC). The IPC sends a class 2 message to the chime producer indicating the chime duration, 4 pulses. The door ajar warning sounds and the appropriate DOOR AJAR indicator illuminates in the driver information center (DIC) when the following occurs:

The inflatable restraint sensing and diagnostic module (SDM) senses that the drivers seat belt is not buckled and the signal is low. The SDM sends a class 2 message to the instrument panel cluster (IPC) requesting illumination of the seat belt indicator. The SDM sends a class 2 message to the chime producer indicating a chime 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:

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.

When the body control module (BCM) detects the key is in the ignition and the signal is low with the driver door open, it activates an audible warning. The key-in-ignition chime sounds at the rate of 100 pulses per minute, medium rate chime, until the driver door is closed or the key removed from the ignition switch. The BCM activates the key-in-ignition warning when all of the following occurs:

The body control module (BCM) will activate an audible warning as a reminder that the headlamps are left ON when exiting the vehicle with the ignition switch in the OFF position. The lights ON warning sounds at the rate of 150 pulses per minute, fast rate chime, until the headlamp switch is turned OFF. The BCM receives a signal from the headlamp and panel dimmer switch via the headlamp relay. The BCM activates the lights on warning chime when the following occurs:

The body control module (BCM) activates an audible warning as a reminder that the turn signal has been on for a distance of more than 1.20 km (0.75 mi). The BCM receives the vehicle speed and distance via the vehicle speed signal circuit. The turn signal chime will use a tone that is synchronized with the turn signal flasher. The BCM will activate the turn signal chime when the following occurs:

The body control module (BCM) activates the park brake chime when the park brake is engaged and the signal circuit is low and vehicle is driven for at least 3 seconds at a speed above 4.8 km/h (3 mph). The chime will sound at the rate of 150 pulses per minute, fast rate chime. The park brake indicator will flash for any distance the vehicle is driven every half second until the park brake is no longer engaged.

The following warnings have an associated instrument panel cluster (IPC) indicator or driver information center (DIC) indicator:

Refer to Indicator/Warning Message Description and Operation .