2013 Chevrolet Tahoe Owner Manual - Page 289

Driving and Operating vehicle is being used, such as with a heavy load or when the temperature changes. During this adaptive shift control process, shifting might feel different as the transmission determines the best settings. When temperatures are very cold, shifting could be delayed providing more stable shifts until the engine warms up. Shifts could be more noticeable with a cold transmission. This difference in shifting is normal. M (Manual Mode): This position lets drivers select the range of gears appropriate for current driving conditions. If the vehicle has this feature, see "Range Selection Mode" under Manual Mode on page 9‑31. 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. 9-31 Manual Mode Range Selection Mode (Hydra-Matic® 6-Speed Transmission) Normal Mode Grade Braking Normal Mode Grade Braking 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 5‑42. 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 5‑42. For other forms of grade braking, see Tow/Haul Mode on page 9‑32 and Cruise Control on page 9‑46. Base Trim Shown (Uplevel Similar) The vehicle may have a Range Selection Mode. The Range Selection Mode helps control the 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).