2010 GMC Acadia Owner's Manual - Page 282

9-26 Driving and Operating designed to improve fuel economy and performance. Use the brake to hold the vehicle on a hill. Do not use the accelerator pedal. L (Low): This position gives you access to gear ranges. This provides more engine braking but lower fuel economy than D (Drive). You can use it on very steep hills, or in deep snow or mud. To use this feature: 1. Move the shift lever to L (Low). 2. Press the plus/minus button located on the shift lever, to increase or decrease the gear range available. When you shift from D (Drive) to L (Low), the transmission will shift to a pre-determined lower gear range. The highest gear available for this pre-determined range is displayed next to the L in the DIC. See Driver Information Center (DIC) (With DIC Buttons) on page 5‑24 or Driver Information Center (DIC) (Without DIC Buttons) on page 5‑29 for more information. The number displayed in the DIC is the highest gear that the transmission will be allowed to operate in. This means that all gears below that number are available. For example, when 4 (Fourth) is shown next to the L, 1 (First) through 4 (Fourth) gears are automatically shifted by the vehicle. D (Drive): This position is for normal driving. It provides the best fuel economy. If you need more power for passing, and you are: . Going less than 56 km/h (35 mph), push the accelerator pedal about halfway down. Going about 56 km/h (35 mph) or more, push the accelerator all the way down. . Notice: If the vehicle seems to accelerate slowly or not shift gears when you go faster, and you continue to drive the vehicle that way, you could damage the transmission. Have the vehicle serviced right away. You can drive in L (Low) when you are driving less than 56 km/h (35 mph) and D (Drive) for higher speeds until then. If the vehicle is stopped on a hill, with your foot off the brake pedal, the vehicle may roll. This is normal and is due to the torque converter Manual Mode Electronic Range Select (ERS) Mode ERS mode allows you to choose the top-gear limit of the transmission and the vehicle's speed while driving down hill or towing a trailer. The vehicle has an electronic shift position indicator within the instrument panel cluster. When using the ERS Mode a number will display next to the L, indicating the current gear that has been selected.