2011 GMC Canyon Regular Cab Owner's Manual - Page 194

9-12 . Driving and Operating If the vehicle stalls, or is about to stall, and you cannot make it up the hill: . . Ease up on the speed as you approach the top of the hill. Attach a flag to the vehicle to be more visible to approaching traffic on trails or hills. Sound the horn as you approach the top of the hill to let opposing traffic know you are there. Use headlamps even during the day to make the vehicle more visible to oncoming traffic. . . Push the brake pedal to stop the vehicle and keep it from rolling backwards and apply the parking brake. If the engine is still running, shift the transmission to R (Reverse), release the parking brake, and slowly back down the hill in R (Reverse). If the engine has stopped running, you need to restart it. With the brake pedal pressed and the parking brake still applied, shift the automatic transmission to P (Park) or the manual transmission to Neutral and restart the engine. Then, shift to R (Reverse), release the parking brake, and slowly back down the hill as straight as possible in R (Reverse). . . While backing down the hill, put your left hand on the steering wheel at the 12 o'clock position so you can tell if the wheels are straight and can maneuver as you back down. It is best to back down the hill with the wheels straight rather than in the left or right direction. Turning the wheel too far to the left or right will increase the possibility of a rollover. { WARNING Driving to the top (crest) of a hill at full speed can cause an accident. There could be a drop-off, embankment, cliff, or even another vehicle. You could be seriously injured or killed. As you near the top of a hill, slow down and stay alert. . Things not to do if the vehicle stalls, or is about to stall, when going up a hill: . Never attempt to prevent a stall by shifting into N (Neutral), or pressing the clutch pedal if the vehicle has a manual transmission, to rev-up the engine and regain forward momentum. This will not work. The vehicle can roll backward very quickly and could go out of control.