Passenger Safety Belt Reminder Light

When the vehicle is started, this light flashes and a chime may come on to remind front passengers to fasten their safety belt. Then the light stays on solid until the belt is buckled.
See Passenger Airbag Status Indicator.
This cycle continues several times if the front passenger remains or becomes unbuckled while the vehicle is moving.
If the front passenger safety belt is buckled, neither the chime nor the light comes on.
The front passenger safety belt reminder light and chime may turn on if an object is put on the seat such as a briefcase, handbag, grocery bag, laptop, or other electronic device. To turn off the reminder light and/or chime, remove the object from the seat or buckle the safety belt.
Test yourself
A quick Cadillac CTS quiz: every answer comes with an explanation and a link to the manual page.