2010 Chevrolet Silverado 1500 Regular Cab Owner's Manual - Page 27

Transmission Range Selection Mode Press the plus/minus buttons, located on the steering column shift lever, to select the desired range of gears for current driving conditions. See Automatic Transmission Operation on page 3‑28. While using Range Selection Mode, cruise control and the Tow/Haul mode can be used. Grade Braking is not available when Range Selection Mode is active. See Tow/Haul Mode on page 3‑34. Four-Wheel Drive If the vehicle has Four-Wheel Drive, you can send the engine's driving power to all four wheels for extra traction. Transfer Case Buttons The vehicle will have one of these three styles of transfer case controls. Use these controls to shift into and out of the different Four-Wheel Drive modes. The Range Selection Mode switch is located on the shift lever. To enable the Range Selection feature, move the column shift lever to the M (Manual) position. The current range will appear next to the M. This is the highest attainable range with all lower gears accessible. As an example, when 4 (Fourth) gear is selected, 1 (First) through 4 (Fourth) gears are available. 1-21