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3-B Install Highback Booster
you MUST store the lower anchor straps. Always secure car seat with the lower anchors or a vehicle
seat belt, even when unoccupied. In a crash, an unsecured car seat can injure passengers.
Graco allows the securing of the car seat with the lower anchor
system in the booster mode, only if the vehicle manufacture allows
it. The child still MUST BE SECURED with the vehicle lap/shoulder
seat belt. The lower anchors can be used in the booster mode
regardless of the weight of the child up to 110 lb (50 kg).
Verify the following before using the lower anchors in the booster
mode:
• The lower anchor attachment DOES NOT interfere with any
vehicle seat belts or buckles.
If the lower anchor attachment interferes with the vehicle seat belts
or if the chosen seating position does not have lower anchor bars,
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