There is a driver seat belt reminder light on the instrument cluster.

When the vehicle is started, this light flashes and a chime may come on to remind the driver to fasten their seat belt. Then the light stays on solid until the belt is buckled.
This cycle may continue several times if the driver remains or becomes unbuckled while the vehicle is moving.
If the driver seat belt is buckled, neither the light nor the chime comes on.
Passenger Seat Belt Reminder LightInput Shaft Seal Replacement - Left (RPO MHC) Automatic Transmission Unit
Input Shaft Seal Replacement - LeftCalloutComponent Name1Transfer Case Input Shaft Seal – LeftCaution:Do not use a screwdriver or punch to remove or install theseal. Using a screwdriver or punch to remove or install the sealmay damage the aluminum housing sealing surface.ProcedureLightly lubricate ...