CHEVROLET Tahoe - Manual (Page 51)

To unlatch the belt, push the button on the buckle.
The belt should go back out of the way.
Before you close the door, be sure the belt is out
of the way. If you slam the door on it, you can
damage both the belt and your vehicle.
Shoulder Belt Height Adjustment
Before you begin to drive, move the shoulder belt
adjuster to the height that is right for you.
Adjust the height so that the shoulder portion of
the belt is centered on your shoulder. The
belt should be away from your face and neck, but
not falling off your shoulder. Improper shoulder
belt height adjustment could reduce the
effectiveness of the safety belt in a crash.
To move it down,
squeeze the buttons (A)
on the sides of the
height adjuster
and move the height
adjuster to the desired
position.
You can move the adjuster up just by pushing up on
the shoulder belt guide.
After you move the adjuster to where you want it, try
to move it down without squeezing the buttons to
make sure it has locked into position.
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