Pontiac Vibe 2003 Owner's Manual page 10

To adjust the seatback, lift the lever located on the
outboard side of the seat. Release the lever to lock the
seatback where you want it. Push on the seat to
make sure it's locked into position. Pull up on the lever
without pushing on the seatback, and the seat will
go to its original upright position.
But don't have a seatback reclined if your vehicle
is moving.
1-4
CAUTION:
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Sitting in a reclined position when your vehicle
is in motion can be dangerous. Even if you
buckle up, your safety belts can't do their job
when you're reclined like this.
The shoulder belt can't do its job because it
won't be against your body. Instead, it will be
in front of you. In a crash you could go into it,
receiving neck or other injuries.
The lap belt can't do its job either. In a crash
the belt could go up over your abdomen.
The belt forces would be there, not at your
pelvic bones. This could cause serious
internal injuries.
For proper protection when the vehicle is in
motion, have the seatback upright. Then sit
well back in the seat and wear your safety
belt properly.