2003 Chevrolet Tahoe Owner's Manual - Page 220

SERVICE STABILITY If you ever see the SERVICE STABILITY message, it means there may be a problem with your Stabilitrak@ system. you see this message try to reset If the system (stop; turn off the engine; then start the engine again). If the SERVICE STABILITY message still comes on, it means there is a problem. You should see your dealer for sewice. The vehicle is safe to drive, however, you do not have the benefit of Stabilitrak@ , so reduce your speed and drive accordingly. STABILITY SYS DISABLED The STABILITY SYS DISABLED message will turn on when you press the Stabilitrak@ button, or when the stability control has been automatically disabled. To limit wheel spin and realize the full benefits of the stability enhancement system, you should normally leave Stabilitrak@ However, you should turn Stabilitrak@ on. off if your vehicle gets stuck in sand, mud, ice or snow and you want to "rock your vehicle to attempt to free it, or if you are driving in extreme off-road conditions and require more wheel spin. See If You Are Stuck: In Sand, Mud, Ice or Snow on page 4-50. To turn the Stabilitrak@ system back on press the Stabilitrak@ button again. There are four conditions that can cause this message to appear. One condition is overheating, which could occur if Stabilitrak@ activates continuously for an extended period of time. The message will also be displayed if the brake system warning light is on. See Brake System Warning Light on page 3-47. The message could be displayed if the stability system takes longer than usual to complete its diagnostic checks due to driving conditions. Also, if an engine or vehicle related problem has been detected, and the vehicle needs service, the message will appear. The message will turn off as soon as the conditions that caused the message to be displayed are no longer present. STABILITY SYS ACTIVE You may see the STABILITY SYS ACTIVE message on the DIC. It means that an advanced computer-controlled system has come on to help your vehicle continue to go in the direction in which you're steering. Stabilitrak@ activates when the computer senses that your vehicle is just starting to spin, as it might if you hit a patch of ice or other slippery spot on the road. When the system activates, you may hear a noise or feel a vibration in the brake pedal. This is normal. When the STABILITY SYS ACTIVE message is on, you should continue to steer in the direction you want to go. The system is designed to help you in bad weather or other difficult driving situations by making the most of whatever road conditions will permit. 3-69