2010 Hummer H3 Owner's Manual - Page 238

9-54 Driving and Operating StabiliTrak comes on automatically whenever the vehicle is started and resets itself at each ignition cycle. However, when the transfer case is placed in Four‐Wheel‐Low Lock mode, StabiliTrak is automatically disabled. See Four-Wheel Drive on page 9‑46 for more information. It is recommended to leave the system on for normal driving conditions, but it may be necessary to turn the system off if the vehicle is stuck in sand, mud, ice, or snow, and it is necessary to "rock" the vehicle to attempt to free it. See If the Vehicle is Stuck on page 9‑26. To Turn off TCS and StabiliTrak, press and hold the TCS/StabiliTrak button until STAB SYS OFF displays on the DIC. Press and release the TCS/StabiliTrak button again to turn StabiliTrak back on. When the vehicle is started and begins to move, the system performs several diagnostic checks to insure there are no problems. The system may be heard or felt while it is working. This is normal and does not mean there is a problem with the vehicle. If cruise control is being used when StabiliTrak activates, the cruise control automatically disengages. The cruise control can be re-engaged when road conditions allow. See Cruise Control on page 9‑57. If there is a problem detected with StabiliTrak, a SERVICE STAB SYS message displays on the Driver Information Center (DIC). See Driver Information Center (DIC) on page 5‑18 for more information. When this message is displayed, the system is not working. Adjust your driving accordingly. Locking Rear Axle For vehicles with this feature, additional traction can be obtained from the rear wheels when traveling in off-road situations such as mud, snow, sand, steep hills and uneven terrain. This light comes on steady when TCS has been turned off. This light flashes when StabiliTrak is active. The button used to turn this feature on or off is located on the instrument panel.