1998 Chevrolet Venture Owner's Manual - Page 18

But don't have a seatback reclined if your vehicle is moving. Sitting ina reclined position when your vehicle is in motioncan 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 couldgo into it, receiving neckor other injuries. The lap belt can't doits job either. In a crash the belt could go up over your abdomen. The belt forces wouldbe there, notat your pelvic bones. This could cause serious internal injuries. For proper protection when the vehicle is in motion, havethe seatback upright. Then sit well backin the seat and wear your safety belt properly. 1-5