2003 GMC Sierra 1500 Pickup Owner's Manual - Page 218

SERVICE 4 WHEEL STEER If a problem occurs with the 4 wheel steer system, this message will appear on the DIC. 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 being driving, the four wheel steer system needs service. SERVICE RIDE CONTROL If a problem occurs with the suspension system, this message will appear on the DiC. If this message appears, stop 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 air suspension system needs service. SERVICE 4WD If a problem occurs with the four wheel drive system, this message will appear on the DIC. 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 four wheel drive system needs service. TURN SIGNAL ON If a turn signal is left on for 314 of a mile (1.2 km), this message will appear on the display and youwill hear a chime. Movethe turn signal/multifunction lever to the off position. Pressing the select button will acknowledge this message and clear it from the DIC display. 3-63