2014 Chevrolet Silverado 3500 HD Crew Cab Owner Manual - Page 302

9-36 Driving and Operating To disable or enable Normal Mode Grade Braking within the current ignition key cycle, press and hold the Tow/Haul button for three seconds. A DIC message displays. See Transmission Messages on page 5-44. For iother forms of grade braking, see Tow/Haul Mode on page 9-37 and Cruise Control on page 9-59. vehicle's transmission and vehicle speed while driving down hill or towing a trailer by letting you select a desired range of gears. To use this feature, do the following: 1. Move the shift lever to M (Manual Mode). 2. Press the plus/minus buttons, located on the steering column shift lever, to select the desired range of gears for current driving conditions. When M (Manual Mode) is selected a number displays next to the M, indicating the current gear. This number is the highest gear that can be used. However, the vehicle can automatically shift to lower gears as it adjusts to driving conditions. This means that all gears below that number are available. When 5 (Fifth) is selected, 1 (First) through 5 (Fifth) gears are automatically shifted by the vehicle, but 6 (Sixth) cannot be used until Notice: Spinning the tires or holding the vehicle in one place on a hill using only the accelerator pedal may damage the transmission. The repair will not be covered by the vehicle warranty. If you are stuck, do not spin the tires. When stopping on a hill, use the brakes to hold the vehicle in place. Normal Mode Grade Braking Vehicles with a gasoline engine and 6-Speed automatic transmission have Normal Mode Grade Braking that is enabled when the vehicle is started, but is not enabled in Range Selection Mode. It assists in maintaining desired vehicle speeds when driving on downhill grades by using the engine and transmission to slow the vehicle. The first time the system engages for each ignition key cycle, a DIC message will be displayed. See Transmission Messages on page 5-44. Manual Mode Range Selection Mode (Allison® Transmission or Hydra-Matic® 6-Speed Transmission) The vehicle may have a Range Selection Mode. The Range Selection Mode helps control the