2003 Chevrolet Tahoe Owner's Manual - Page 291

If the system fails to turn on or activate, the STABILITY SYS DISABLED or SERVICE STABILITY message will be displayed. If the vehicle has gone through heavy acceleration or braking during the first two miles after starting your vehicle, the STABILITY SYS DISABLED message may appear. If this is the case, your vehicle does not need servicing. Turn your vehicle off and back on again to reset the system. If either message appears on the Driver Information Center (DIC), and your vehicle hasn't gone through hard acceleration or braking in the first two miles, your vehicle should be taken in for service. The STABILITY SYS ACTIVE message will appear on the Driver Information Center (DIC) only when the system is both on and activated. You may also feel or hear the system working; this is normal. For more information on the stability messages, see Driver Information Center (DIC) on page 3-52. The Stabilitrak@ mode button is located on the instrument panel. Stabilitrak@ and part of the traction control system can be turned off or back on by pressing the Stabilitrak@ button. All-wheel drive vehicles must be in all-wheel drive mode to turn the system on or off. When the system is turned off, the traction off light will illuminate, and the STABILITY SYS DISABLED message will appear on the DIC to warn the driver that both the stability system and part of the traction control system are disabled. Your vehicle will still have brake-traction control when Stabilitrak@ off, but is will not be able to use the engine speed management system. See "Traction Control Operation" next for more information. When the Stabilitrak@ system has been turned off you may still hear system noises as a result of the brake-traction control coming on. It is recommended to leave the system on for normal driving conditions, but it may be necessary to turn the system off if your vehicle is stuck in sand, mud, ice or snow, and you want to "rock" your vehicle to attempt to free it. It may also be necessary to turn off the system when driving in extreme off-road conditions where high wheel spin is required. See If You Are Stuck: In Sand, Mud, Ice or Snow on page 4-50. When the transfer case is in 4 low, the stability system is automatically disabled, and the STABILITY SYS DISABLED message will appear on the DIC. In 4 low, the Stabilitrak@ button only turns the traction control system on and off. 4-12