2004 Hummer H2 Owner's Manual - Page 169

Traction Off Light The traction off light will come on when a traction control system or anti-lock brake system problem has been detected. The vehicle may need service. Engine Coolant Temperature Gage When this light is on, the system will not limit wheel spin. Adjust your driving accordingly. See Traction Control System (TCS) on page 4-9. If the Traction Control System (TCS) detects that the vehicle's brake's are overheating, the TCS will shut off and the traction off light will come on. When the brakes cool off, the TCS will turn back on automatically and the traction off light will go out. United States Canada This gage shows the engine coolant temperature. It also provides an indicator of how hard your vehicle is working. During a majority of the operation, the gage will read 210°F (100°C) or less. If you are pulling a load or going up hills, it is normal for the temperature to fluctuate and approach the 250°F (122°C) mark. If the gage reaches the 260°F (125°C) mark, it indicates that the cooling system is working beyond its capacity. See Engine Overheating on page 5-27. 3-35