GMC C-Series 2001, Owner'S Manual, Page: 22 / 324

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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
--
no more
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.