1998 GMC Safari Owner's Manual - Page 197

While driving on a surface with reduced traction, try your best to avoid sudden steering, acceleration or braking (including engine braking by shiftinga lower to gear). Any sudden changes could cause the tires slide. to You may not realize the surfaceis slippery until your vehicle is skidding. Learnto recognize warning clues -- such as enough water, or packed snow on ice the road to make a "mirrored surface" and slow down -when you have any doubt. Remember: Any anti-lock brake system (ABS) helps avoid only the braking skid. Night drivingis more dangerous than day driving. One reason is that some drivers are likely to be impaired -- by alcohol or drugs, with night vision problems, or by fatigue. 4-13