Chevrolet 2000 C-Series Owner's Manual page 22

D
Let it go back all the way.
D
You can add a small amount of slack. The system
works like a window shade. To add a little slack, pull
down on the shoulder belt just a little
than 1 inch (25 mm).
D
If it's now too loose, pull it out like you did before
and start again.
D
If you move around in the vehicle and your shoulder
belt becomes loose, be sure to make it tight again.
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no more
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