1993 Chevrolet Suburban Owner's Manual - Page 17
1993 Chevrolet Suburban Manual
Page 17 highlights
Seats & Safety Belts Don'thaveaseatbackreclined i if your vehicle is moving. AN1 01 020 I CAUTION A I sittingin a reclinedpositionwhenyourvehicle is in motioncan be ,,.Igerous. Even if you buckle up,yoursafetybelts can't do their job whenyou'rereclined like this. 1 The shoulder belt can't do its job because it won't be against your body.Instead, it will be infront of you. In a crashyou could go into it,receivingneck or other injuries. The lap beltcan't do i t s jobeither.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 vehicleisinmotion,have the I seatback upright. Then sit well back in the seat and wear your belt properly. safety I