2008 Chevrolet Silverado 1500 Pickup Owner's Manual - Page 134

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 3 mph (5 km/h) 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 3 mph (5 km/h). Shifting into Four-Wheel-Drive Low should be done, if possible, with the vehicle at a slight roll, 3 mph (5 km/h) or less. • Shifting into Four-Wheel-Drive Low with the vehicle at a stop may be more difficult. You may be unable to complete the shift to Four-Wheel-Drive Low, and will end up in NEUTRAL. This is normal, and is a function of the gear teeth aligning in your transfer case. When this happens, make sure the engine is on, shift your transmission momentarily to drive and back to NEUTRAL, and then complete the shift. • Shift the transfer case shift lever in one continuous motion into the Four-Wheel-Drive Low position. • When Four-Wheel-Drive Low do not drive faster than 45 mph. This will reduce wear and extend the life of your transfer case. • Shift the transmission into NEUTRAL (N). {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 2-50. 2-40