2009 Buick Lucerne Owner's Manual - Page 205

SERVICE A/C (Air Conditioning) SYSTEM This message displays when the electronic sensors that control the air conditioning and heating systems are no longer working. Have the climate control system serviced by your dealer/retailer if you notice a drop in heating and air conditioning efficiency. SERVICE BRAKE ASSIST This message displays if there is a problem with the brake system. The brake system warning light and the antilock brake system warning light may also be displayed on the instrument panel cluster. See Brake System Warning Light on page 3-40 and Antilock Brake System (ABS) Warning Light on page 3-41 for more information. If this happens, 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 displayed or appears again when you begin driving, the brake system needs service. See your dealer/retailer as soon as possible. See Brakes on page 5-40 for more information. SERVICE AIR BAG This message displays when there is a problem with the airbag system. Have your vehicle serviced by your dealer/retailer immediately. See Airbag Readiness Light on page 3-38 for more information. SERVICE BATTERY CHARGING SYSTEM This message displays when there is a problem with the generator and battery charging systems. Driving with this problem could drain the battery. Turn off all unnecessary accessories. Stop and turn off the vehicle as soon as it is safe to do so. Have the electrical system checked by your dealer/retailer immediately. SERVICE BRAKE SYSTEM This message displays if the ignition is on to inform the driver that the brake fluid level is low. Have the brake system serviced by your dealer/retailer as soon as possible. The brake system warning light also appears on the instrument panel cluster when this message appears on the DIC. See Brake System Warning Light on page 3-40. 3-65