2011 Chevrolet Silverado 1500 Regular Cab Owner's Manual - Page 337

Driving and Operating . 9-53 Avoid driving in Four-Wheel Drive on clean, dry pavement. It may cause your tires to wear faster, make the transfer case harder to shift, and run noisier. If the transfer case shifter is in the N (Neutral) position and you have difficulty reaching the selected transfer case mode, with the engine running, shift the transmission momentarily to D (Drive) and then back to N (Neutral). This will realign the gear teeth in the transfer case and allow you to complete the shift. Shifting from Two-Wheel Drive High to Four-Wheel Drive High . . . Shifts between Two-Wheel Drive High and Four-Wheel Drive High can be made at any vehicle speed. Shift the transfer case lever in one continuous motion into either the Four-Wheel Drive High or Two-Wheel Drive High position. Shifting from Two-Wheel Drive High to Four-Wheel Drive High while the vehicle is in motion may require that moderate force be applied to the shift lever for a few seconds before Four-Wheel Drive High can be engaged, especially in cold weather. In extremely cold weather, it may be necessary to slow or stop the vehicle to shift into Four-Wheel Drive High. While in Four-Wheel Drive High, the vehicle can be driven at any posted legal speed limit. Shifting In or Out of Four-Wheel Drive Low Notice: Shifting the transfer case into Four-Wheel-Drive Low while moving at speeds faster than 5 km/h (3 mph) may cause premature wear to the transfer case, and may cause the gears to grind. To avoid causing premature wear, and grinding the gears, do not shift the transfer case into Four-Wheel-Drive Low while the vehicle is moving faster than 5 km/h (3 mph). . . . . Shifting into Four-Wheel Drive Low should be done, if possible, with the vehicle at a slight roll, 5 km/h (3 mph) or less.