GMC HUMMER EV 2023 Owner's Manual page 49

48 Seats and Restraints
If you slid under it, the belt would apply
force on your abdomen. This could cause
serious or even fatal injuries.
Wear the shoulder belt over the shoulder
and across the chest. These parts of the
body are best able to take belt
restraining forces. The shoulder belt locks
if there is a sudden stop or crash.
Warning
You can be seriously injured, or even
killed, by not wearing your seat belt
properly.
Never allow the lap or shoulder belt to
become loose or twisted.
Never wear the shoulder belt under both
arms or behind your back.
Always use the correct buckle for your
seating position.