2010 Chevrolet Colorado Crew Cab Owner's Manual - Page 184

Charging System Light This light comes on briefly when the ignition key is turned to START, but the engine is not running, as a check to show it is working. Up-Shift Light The vehicle may have an up-shift light. If it does not, have the vehicle serviced by your dealer/ retailer. The light should go out once the engine starts. If it stays on, or comes on while driving, there could be a problem with the charging system. A charging system message in the Driver Information Center (DIC) can also appear. See DIC Warnings and Messages on page 4‑36 for more information. This light could indicate that there are problems with a generator drive belt, or that there is an electrical problem. Have it checked right away. If the vehicle must be driven a short distance with the light on, turn off accessories, such as the radio and air conditioner. When this light comes on, shift to the next higher gear if weather, road, and traffic conditions allow. See Manual Transmission Operation on page 3‑26 for more information. Brake System Warning Light The vehicle's hydraulic brake system is divided into two parts. If one part is not working, the other part can still work and stop the vehicle. For good braking though, both parts need to be working well. If the warning light comes on, there could be a brake problem. Have the brake system inspected right away. 4-24