2009 Chevrolet Impala Owner's Manual - Page 154

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 3-30. For vehicles with a Driver Information Center (DIC), see DIC Warnings and Messages on page 3-49 for all brake related DIC messages. If it does not, have the vehicle serviced by your dealer/retailer. If the system is working normally the indicator light then goes off. When the system is active, the light flashes while the system is limiting wheel spin or assisting with controlling the vehicle. If it stays on or comes on while driving a SERVICE TRACTION CONTROL message appears in the Driver Information Center (DIC). This indicates that there could be a problem with the traction control system and the vehicle may need service. When this warning light is on and the SERVICE TRACTION CONTROL message appears on the DIC, the system does not limit wheel spin. If the traction control system is manually turned off, this light comes on and the TRACTION CONTROL OFF message appears on the DIC. See Traction Control System (TCS) on page 4-8 and DIC Warnings and Messages on page 3-49 for more information. Traction Control System (TCS) Warning Light For vehicles with a Traction Control System (TCS) and StabiliTrak® warning light, this light comes on briefly when the engine is started. 3-32