Passenger Safety BeltReminder Light
Several seconds after the key is turned to RUN or START, a chime will sound for several seconds to remind the front passenger to buckle their safety belt. This would only occur if the passenger airbag is enabled. The passenger safety belt light will also come on and stay on for several seconds, then it will flash for several more.

This chime and light will be repeated if the passenger remains unbuckled and the vehicle is in motion.
If the passenger’s safety belt is buckled, neither the chime nor the light will come on.
See also:
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The Buick Regal's sleek design blends the sweeping silhouette and proportions
of a coupe in a progressive package that suggests motion from all angles. Great
attention to detail complements that a ...
Playing from a USB (Radio with CD and Touchscreen)
A USB mass storage device or
Microsoft Transfer Protocal (MTP)
device can be connected to the
USB port.
The USB port is in the center
console.
The USB icon displays when the
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Trailer Brakes
Because the vehicle has antilock brakes, do not try to
tap into the vehicle’s hydraulic brake system. If you
do, both brake systems will not work well, or at all.
Does your trailer have its own ...
