2011 Chevrolet Silverado 1500 Regular Cab Owner's Manual - Page 186

5-42 Instruments and Controls As soon as it is safe to do so, carefully pull your vehicle over to the side of the road and turn the ignition off. Check the wiring connection to the trailer and turn the ignition back on. If this message still displays, either your vehicle or the trailer needs service. See your dealer. See "Integrated Trailer Brake Control System" under Towing Equipment on page 9‑105 for more information. SERVICE BRAKES SOON On some vehicles, this message displays if there is a problem with the brake system. If this message appears, stop as soon as possible and turn off the vehicle. Restart the vehicle and check for the message on the DIC display. If the message is still displayed or appears again when you begin driving, the brake system needs service. See your dealer. HOOD OPEN This message displays and a chime may sound if the hood is not fully closed. Stop and turn off the vehicle, check the hood for obstructions, and close the hood again. Check to see if the message still appears on the DIC. LEFT REAR DOOR OPEN (Crew Cab) This message displays and a chime may sound if the driver side rear door is not fully closed and the vehicle is shifted out of P (Park). Stop and turn off the vehicle, check the door for obstructions, and close the door again. Check to see if the message still appears on the DIC. SERVICE TRAILER BRAKE SYSTEM On vehicles with the Integrated Trailer Brake Control (ITBC) system, this message displays and a chime may sound when there is a problem with the ITBC system. When this message displays, power is no longer available to the trailer brakes. Door Ajar Messages DRIVER DOOR OPEN This message displays and a chime may sound if the driver door is not fully closed and the vehicle is shifted out of P (Park). Stop and turn off the vehicle, check the door for obstructions, and close the door again. Check to see if the message still appears on the DIC.