2009 Chevrolet Silverado 2500 HD Extended Cab Owner's Manual - Page 137
2009 Chevrolet Silverado 2500 HD Extended Cab Manual
Page 137 highlights
A Four-Wheel Drive indicator light comes on when you shift into four-wheel drive and the front axle engages. See Four-Wheel-Drive Light on page 3-51. Some delay between shifting and when the indicator light comes on is normal. Notice: Driving on clean, dry pavement in four-wheel drive for an extended period of time can cause premature wear on the vehicle's powertrain. Do not drive on clean, dry pavement in Four-Wheel Drive for extended periods of time. 4 n (Four-Wheel-Drive Low): This setting also engages the front axle and delivers extra torque. You may never need Four-Wheel-Drive Low. It sends maximum power to all four wheels. You might choose Four-Wheel-Drive Low if you are driving off-road in deep sand, deep mud, deep snow, and while climbing or descending steep hills. If the vehicle has StabiliTrak®, shifting into Four-Wheel-Drive Low will turn Traction Control and StabiliTrak® off. See StabiliTrak® System on page 4-6. Recommended Transfer Case Settings Driving Conditions Normal Severe Extreme Vehicle in Tow* *See Recreational Vehicle Towing on page 4-45 Towing Your Vehicle on page 4-45 Transfer Case Settings 2 m 4 m 4 n N YES YES YES YES 2-37