2008 Hummer H3 Alpha Owner's Manual - Page 101

Up-Shift Light This light will show you when to shift to the next higher gear for best fuel economy. Shift Speeds {CAUTION: If you skip a gear when you downshift, you could lose control of your vehicle. You could injure yourself or others. Do not shift down more than one gear at a time when you downshift. When this light comes on, you can shift to the next higher gear if weather, road and traffic conditions permit. For the best fuel economy, accelerate slowly and shift when the light comes on. While you accelerate, it is normal for the light to go on and off if you quickly change the position of the accelerator. Ignore the shift light when you downshift. If your vehicle has four-wheel drive and has a manual transmission, disregard the shift light when the transfer case is in four-wheel low. For more information, see Up-Shift Light on page 3-32. Full-Time Four-Wheel Drive Full-Time Four-Wheel Drive sends your engine's driving power to all four wheels for extra traction. To get the most out of Full-Time Four-Wheel Drive, you must be familiar with its operation. 2-27