2007 Chevrolet Silverado 1500 Pickup Owner's Manual - Page 162

Shifting Out of Four-Wheel Drive Low To shift from Four-Wheel Drive Low to Four-Wheel Drive High, AUTO 4WD, or Two-Wheel Drive High, your vehicle must be stopped or moving less than 3 mph (5 km/h) with the transmission in NEUTRAL (N) and the ignition in RUN. The preferred method for shifting out of Four-Wheel Drive Low is to have your vehicle moving 1 to 2 mph (1.6 to 3.2 km/h). Press and release the Four-Wheel Drive High, AUTO 4WD, or Two-Wheel Drive High switch. You must wait for the Four-Wheel Drive High, AUTO 4WD, or Two-Wheel Drive High indicator light to stop flashing and stay on before shifting the transmission into gear. Notice: Shifting the transmission into gear before the Four-Wheel Drive Low indicator light has stopped flashing could damage the transfer case. To help avoid damaging your vehicle, always wait for the Four-Wheel Drive Low indicator light to stop flashing before shifting the transmission into gear. The transfer case may make noise and the vehicle may jerk when the transfer case is shifted between Four-Wheel Drive Low and Four-Wheel Drive High ranges or from NEUTRAL with the engine running. If the Four-Wheel Drive high, AUTO 4WD, or Two-Wheel Drive High switch is pressed when your vehicle is in gear and/or moving, the Four-Wheel Drive High, AUTO 4WD, or Two-Wheel Drive High indicator light will flash for 30 seconds but the vehicle will not complete the shift unless it is moving less than 3 mph (5 km/h) and the transmission is in NEUTRAL (N). 162