2007 Chevrolet Silverado 2500 Pickup Owner's Manual - Page 165

Use these switches to shift into and out of four-wheel drive. You can choose among three driving settings: Indicator lights in the switches show you which setting you are in. The indicator lights will come on briefly when you turn on the ignition and the last chosen setting will stay on. If the lights do not come on, you should take your vehicle in to your dealer for service. An indicator light will flash while shifting. Fast flashing means the conditions are not being met to make the desired shift, typically the vehicle is going too fast, the automatic transmission is not in neutral, or the clutch pedal is not fully pressed. Slow flashing means the shift is in progress. It will stay on when the shift is completed. If for some reason the transfer case cannot make a requested shift, it will return to the last chosen setting. 2 m (Two-Wheel Drive High): This setting is for driving in most street and highway situations. The front axle is not engaged in two-wheel drive. {CAUTION: Shifting the transfer case to NEUTRAL can cause your vehicle to roll even if the transmission is in PARK (P). You or someone else could be seriously injured. Be sure to set the parking brake before placing the transfer case in NEUTRAL. See Parking Brake on page 170. (N) NEUTRAL: Shift the vehicle's transfer case to NEUTRAL only when towing your vehicle. See Recreational Vehicle Towing on page 418 or Towing Your Vehicle on page 417 for more information. 4 m (Four-Wheel Drive High): This setting engages the front axle to help drive your vehicle. Use Four-Wheel Drive High when you need extra traction, such as on snowy or icy roads, or in most off-road situations. 165