1997 GMC Suburban Owner's Manual - Page 92

REVERSE (R): Use this gear to back up. I NOTICE: Shifting to REVERSE (R) while your vehicle is moving forward could damage your transmission. Shiftto REVERSE (R) only after your vehicle is stopped. I To rock your vehicle back and forth to get out of snow, ice or sand without damaging your transmission, see "Stuck: In Sand, Mud, Ice or Snow" in the Index. NEUTRAL (N): In this position, your engine doesn't connect with the wheels. To restart when you're already moving, use NEUTRAL (N) only. Also, use NEUTRAL (N) when your vehicle is being towed. Shifting outof PARK (P) or NEUTRAL (N) while your engine is "racing" (running at high speed) is dangerous. Unless your foot is firmly on the brake pedal, yourvehicle could move very rapidly. You could lose control and hit people or objects. Don't shift out of PARK (P) or NEUTRAL (N) while your engine is racing. I NOTICE: Damage to your transmission causedby shifting out of PARK (P) or NEUTRAL (N) with the engine racing isn't covered by your warranty. 2-18