Pontiac 2004 Bonneville Owner's Manual page 12

But do not have a seatback reclined if your vehicle is
moving.
1-6
CAUTION:
{
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. In a crash,
you could go into it, receiving neck or other
injuries.
CAUTION: (Continued)