2006 Chevrolet Silverado 1500 Pickup Owner's Manual - Page 235

SERVICE BRAKE BOOSTER {CAUTION: Your brake system may not be working properly if the SERVICE BRAKE BOOSTER message is displayed. If the brake system warning light is also on, you should have the vehicle towed for service. See Brake System Warning Light on page 3-41. If the brake system warning light is not on, you still have brakes, but the supplemental brake assist system on vehicles with rear disc brakes may not operate properly. In the event of a vacuum loss, you may not have vacuum power assist for braking. The brake pedal will be harder to push and it will take longer to stop. If you continue to drive with this message displayed it can lead to a crash. Have the brake system serviced as soon as possible. If your vehicle has vacuum assist power brakes, this message will be displayed on the DIC when there is a problem with the Supplemental Brake Assist system. If the message is displayed immediately after starting the vehicle or the message appears while driving, your Supplemental Brake Assist system needs service. See your GM dealer. See Brake System Warning Light on page 3-41 for additional information. SERVICE BRAKE SYSTEM If there is a problem with the brake system, this message will be displayed 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 brake system needs service. See your GM dealer. 3-61