1998 GMC Suburban Owner's Manual - Page 217

What if I'm driving across an incline that's not too steep, butI hit some loose gravel and start to slide downhill. What should I do? A: If you feel your vehicle starting to slide sideways, turn downhill. This should help straighten out the vehicle and prevent the side slipping. However, a much better way to prevent this is to get out and "walk the course" so you know what the surface is like before you drive it. Stalling on an Incline If your vehicle stalls when you're crossing an incline, be sure you (and your passengers) get out on the uphill side, even if the door there is harder to open. If you get out on the downhill side and the vehicle starts to roll over, you'll be right in its path. IT you have to walk down the slope, stay out of the path the vehicle will take if it does roll ovec I Getting out on the downhill (low) side vehicle of a stopped acrossan incline is dangerous. If the vehicle rolls over, you could be crushed orkilled. Always get out on the uphill (high) sidethe of vehicle and stay well clear of the rollover path.