2004 GMC Sierra 1500 Pickup Owner's Manual - Page 307

The next time you start your vehicle, the TAS will not automatically come on. You can restore the automatic feature by repeating the same procedure. Whether the TAS is set to come on automatically or not, you can always turn the system on or off by pressing the TAS on/off button. Press it to activate the selectable ride setting as desired. An indicator light near the button will illuminate whenever the system is active. It is recommended to use this system as follows: • For optimum ride comfort in an unloaded vehicle the button should be out. The indicator light will not be lit. This button position indicates NORMAL levels of ride control or damping. Manual Selectable Ride The main function of this system is to provide superior ride comfort while trailering or fully loaded, as well as for unloaded driving. This system also helps to provide: • For optimum ride comfort when trailering, fully loaded, driving off-road, or when personal preferences demand more control, the button should be pressed in with the indicator light lit. This switch position indicates FIRM levels of ride control or damping. The following guide can also be used to help determine the best setting. NORMAL: The indicator light will not be lit when the system is in this setting. Use for normal city and highway driving. This setting provides a smooth, soft ride when the vehicle is unloaded. FIRM (Unloaded): Press the button to activate this setting, the indicator light will be lit. Use this setting when road conditions or personal preference demand more control. This setting provides more "feel″ or response to the road conditions. • Improved trailering stability • Improved handling response when trailering or fully loaded This button is located on the center of the instrument panel near the radio. 4-11