2010 Chevrolet Colorado Crew Cab Owner's Manual - Page 141

Up-Shift Light This light will show you when to shift to the next higher gear for best fuel economy. 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 the vehicle has four-wheel drive and has a manual transmission, disregard the shift light when the transfer case is in four-wheel low. Shift Speeds 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. { WARNING: If you skip a gear when you downshift, you could lose control of the vehicle. You could injure yourself or others. Do not shift down more than one gear at a time when you downshift. 3-27