Oldsmobile 1999 Silhouette - Manual (Page 67)

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Securing a Child in the Built-In
Child Restraint
1. Raise the head restraint until the lower edge of the
head restraint is even with the top of the seatback.
2. Rotate the head restraint rearward until it touches the
top of the seatback. Make sure there is no gap
between the lower edge of the head restraint and the
top of the seatback.