Chevrolet 1998 Lumina Owner's Manual page 56

10. Adjust the position of the harness on the child's
shoulders by moving the clip up or down along the
harness. On each side of the harness, the shoulder
part should be centered on the child's shoulder. The
harness should be away from the child's face and
neck, but not falling off the child's shoulders.
Removing the Child from the Built-in
Child Restraint
1. Unfasten the shoulder harness clip.
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