2008 GMC Acadia Owner's Manual - Page 114

DRIVE (D): This position is for normal driving. It provides the best fuel economy for your vehicle. If you need more power for passing, and you are: Electronic Range Select Mode Electronic Range Selector (ERS) mode allows you to choose the top-gear limit of the vehicle's transmission and the vehicle's speed while driving down hill or towing a trailer. To use this feature, do the following: 1. Move the shift lever to LOW (L). 2. Press the plus/minus button located on the shift lever, to increase or decrease the gear range available based upon your current driving conditions and needs. • Going less than 35 mph (56 km/h), push your accelerator pedal about halfway down. • Going about 35 mph (56 km/h) or more, push the accelerator all the way down. Notice: If your vehicle seems to accelerate slowly or not shift gears when you go faster, and you continue to drive your vehicle that way, you could damage the transmission. Have your vehicle serviced right away. You can drive in LOW (L) when you are driving less than 35 mph (56 km/h) and DRIVE (D) for higher speeds until then. LOW (L): This position gives you access to gear ranges. This provides more engine braking but lower fuel economy than DRIVE (D). You can use it on very steep hills, or in deep snow or mud. 2-32