1998 GMC Suburban Owner's Manual - Page 215

Q.' Are there some things I should not do when driving down a hill? Yes! These are important because if you ignore them you could lose control and have a serious accident. &= A: 0 Am I likely to stall when going downhill? It's much more likely to happen going uphill. But if it happens going downhill, here's what to do. A: 0 Stop your vehicle by applying the regular brakes. Apply the parking brake. Shift to PARK (P) and, while still braking, restart the engine. Shift back to a low gear. release the parking brake. and drive straight down. When driving downhill, avoid turns that take you across the incline of the hill. A hill that's not too steep to drivedown may be too steep to drive across. You could roll over if you don't drive straight down. Never go downhill with the transmission i n NEUTRAL (N). This is called "free-wheeling." Your brakes will have to do all the work and could overheat and fade. 0 0 0 If the engine won't start, get out and get help. 4-23