2011 Chevrolet Silverado 1500 Regular Cab Owner's Manual - Page 321

Driving and Operating WARNING (Continued) Plug the cord into a properly grounded three-prong 110-volt AC outlet. If the cord will not reach, use a heavy-duty three-prong extension cord rated for at least 15 amps. 4. Before starting the engine, be sure to unplug and store the cord as it was before to keep it away from moving engine parts. If you do not, it could be damaged. The length of time the heater should remain plugged in depends on several factors. Ask a dealer in the area where you will be parking the vehicle for the best advice on this. 9-37 Shifting Into Park 1. Hold the brake pedal down, then set the parking brake. See Parking Brake on page 9‑64 for more information. 2. Move the shift lever into the P (Park) position by pulling the shift lever toward you and moving it up as far as it will go. 3. Be sure the transfer case is in a drive gear - not in N (Neutral). 4. Turn the ignition key to LOCK/OFF. 5. Remove the key and take it with you. If you can leave the vehicle with the ignition key in your hand, the vehicle is in P (Park). { WARNING It can be dangerous to get out of the vehicle if the shift lever is not fully in P (Park) with the parking brake firmly set. The vehicle can roll. If you have left the engine running, the vehicle can move suddenly. You or others could be injured. To be sure the vehicle will not move, even when you are on fairly level ground, use the steps that follow. With four-wheel drive, if the transfer case is in N (Neutral), the vehicle will be free to roll, even if the shift lever is in P (Park). So, be sure the transfer case is in a drive gear - not in N (Neutral). If you are pulling a trailer, see Driving Characteristics and Towing Tips on page 9‑85.