2002 GMC Envoy Owner's Manual - Page 249

Q: A: 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. Q: A: 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. D Stop your vehicle by applying the regular brakes. Apply the parking brake. the engine. D When driving downhill, avoid turns that take you across the incline of the hill. A hill that's not too steep to drive down may be too steep to drive across. You could roll over if you don't drive straight down. D Shift to PARK (P) and, while still braking, restart D Shift back to a low gear, release the parking brake, and drive straight down. D Never go downhill with the transmission in NEUTRAL (N). This is called "free-wheeling." Your brakes will have to do all the work and could overheat and fade. D If the engine won't start, get out and get help. 4-25