2004 Hummer H2 Owner's Manual - Page 236

Another feature of this system is the Traction Control 2 (TC2) mode. TC2 should be selected for improved traction and system performance when the vehicle is on loose surfaces such as deep sand or mud. To enter this mode, press the TC2 button located on the instrument panel to the right of the steering wheel. It will not operate in 4HI. If the TC2 button is pressed while in 4HI, the light will flash for about 15 seconds and then go out. The light should also come on briefly when you turn the ignition key to RUN; if it doesn't see your dealer for service. If you restart your engine, the system reverts to the standard TCS mode. The traction off light will come on when a Traction Control System or Anti-Lock Brake System problem has been detected and the vehicle needs service. See Traction Off Light on page 3-35. When the traction off light is on, adjust your driving accordingly. The traction control system, as delivered from the factory, will automatically come on whenever you start your vehicle. TC2 only operates in the following transfer case modes: • 4HI Lock • 4LO Lock • 4LO Lock and Rear Axle Lock See Locking Rear Axle on page 4-11 for more information on the rear axle lock. 4-10