GMC 1995 Suburban Owner's Manual page 54

Safety Belt Use During Pregnancy
Safety belts work for everyone, including pregnant women. Like all
occupants, they are more likely to be seriously injured if they don't wear
safety belts.
A pregnant woman should wear a lap-shoulder belt, and the lap portion
should be worn as low as possible throughout the pregnancy.
The best way to protect the fetus is to protect the mother. When a safety belt
is worn properly, it's more likely that the fetus won't be hurt in a crash. For
pregnant women, as for anyone, the key to making safety belts effective is
wearing them properly.
Right Front Passenger Position
The right front passenger's safety belt works the same way as the driver's
safety belt. See "Driver Position," earlier in this section.
When the lap portion of the belt is pulled out all the way, it will lock. If it
does, let it go back all the way and start again.
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