Graco Extend2Fit Instruction Manual page 40

7. Make Sure Base is a minimum of
80% on Vehicle Seat
8. Check the Level Indicator
Vehicle MUST be on level ground.
Bubble must be completely under
the blue lines. Readjust the recline
if needed. Or if needed, rolled towels
may be placed under the car seat at the
vehicle seat crease, until the bubble is
completely under the blue lines.
For infants 3 months and under, the
bubble must be entirely under the light
blue line.
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