1996 GMC Sonoma Owner's Manual - Page 12

But don't have a seatback reclined vehicle is moving. if your Sitting in a reclined position when your vehicle is in motion can be dangerous. Even buckle if you up, your safety belts can't do their job when you're reclined like this. The shoulderbelt can't do its job because it body. Instead, it will be in won't be against your front of you. In a crash you could go into it, receiving neckor other injuries. The lap belt can't do its either. In a crash the job belt couldgo up over your abdomen. The belt forces would be there, not yourpelvic bones. at This could cause serious internal injuries. For proper protection when the vehicle is in motion, have the seatback upright. Then well sit back in the seat wear your safety belt properly. and 1-4