Chevrolet 2010 Tahoe Owner's Manual page 82

Q: What is wrong with this?
A: The belt is over an armrest.
WARNING:
You can be seriously injured if your belt goes over
an armrest like this. The belt would be much too
high. In a crash, you can slide under the belt. The
belt force would then be applied on the abdomen,
not on the pelvic bones, and that could cause
serious or fatal injuries. Be sure the belt goes
under the armrests.
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