GMC 1993 Safari Owner's Manual page 37

CAUTION
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 at the abdomen
not at the pelvic bones, and that could cause serious or fatal injuries
Be sure the belt goes under the armrests.
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Q: What's wrong with this?
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AMI 25001
A: The shoulder belt is worn under the arm. It should be worn over the
shoulder at all times.
r
You can be seriously injured if you wear the shoulder belt under you1
arm. In a crash, your body would move too far forward, which would
increase the chance of head and neck injury. Also, the belt would
apply too much force to the ribs, which aren't as strong as shoulder
bones. You could also severely injure internal organs like your liver
or spleen.
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