2006 Hummer H3 Owner's Manual - Page 205

Traction Control System (TCS) Your vehicle has a Traction Control System (TCS) that limits wheel spin. This is especially useful in slippery road conditions. The system operates only if it senses that any of the wheels are spinning or beginning to lose traction. When this happens, the system applies the brakes to limit wheel spin and also reduces engine power. You may feel or hear the system working, but this is normal. The Traction Control System may operate on dry roads under some conditions. When this happens, you may notice a reduction in acceleration or a pumping sound. This is normal and doesn't mean there's a problem with your vehicle. Examples of these conditions include hard acceleration in a turn, an abrupt upshift or downshift of the transmission or driving on rough roads. If your vehicle is in cruise control when the TCS begins to limit wheel spin, the cruise control will automatically disengage. When road conditions allow you to safely use it again, you may re-engage the cruise control. See Cruise Control on page 3-11. If your vehicle has a Driver information Center (DIC), a TRACTION FAILED message will appear when a Traction Control System or Anti-Lock Brake System problem has been detected and the vehicle needs service. See DIC Warnings and Messages on page 3-44 for more information. When this message is on, the system will not limit wheel spin. Adjust your driving accordingly. The traction control system automatically comes on whenever you start your vehicle. To limit wheel spin, especially in slippery road conditions, you should always leave the system on. But you can turn the traction control system off if you ever need to. To turn the system off, press and release the TCS button located on the instrument panel. This light will come on steady when the traction control system has been turned off. This light flashes when TCS is active. 4-9