2009 Chevrolet Impala Owner's Manual - Page 155

Electronic Stability Control Indicator Light This light comes on briefly while the engine is started. If it does not, have the vehicle serviced by your dealer/retailer. If the system is working normally the indicator light will then go off. This light can come on after the vehicle is first driven and the STABILITRAK NOT READY message appears in the Driver Information Center (DIC). See Electronic Stability Control (ESC) on page 4-6 for more information. If the light stays on, or comes on while driving a SERVICE STABILITRAK message appears in the DIC. This indicates that there may be a problem with the Electronic Stability Control (ESC) system and the vehicle may need service. When this warning light is on and the SERVICE STABILITRAK message appears on the DIC, the ESC system does not assist in controlling the vehicle. When the system is active, the light flashes while the system is assisting in controlling the vehicle. See Electronic Stability Control (ESC) on page 4-6 and DIC Warnings and Messages on page 3-49 for more information. 3-33