2011 Chevrolet Silverado 1500 Regular Cab Owner's Manual - Page 173

Instruments and Controls If the regular brake system warning light is not on, the vehicle still has brakes, but not antilock brakes. If the regular brake system warning light is also on, the vehicle does not have antilock brakes and there is a problem with the regular brakes. See Brake System Warning Light on page 5‑27. For vehicles with a Driver Information Center (DIC), see Brake System Messages on page 5‑41 for all brake‐related DIC messages. If the vehicle is a hybrid, see the hybrid supplement for more information. 5-29 Four-Wheel-Drive Light Tow/Haul Mode Light For vehicles equipped with the four-wheel-drive light, it comes on when a vehicle with a manual transfer case is shifted into four-wheel drive and the front axle engages. Some delay between the shifting and the light coming on is normal. See Four-Wheel Drive on page 9‑50 for more information. For vehicles with the Tow/Haul Mode feature, this light comes on when the Tow/Haul Mode has been activated. For more information, see Tow/Haul Mode on page 9‑46.