2004 Hummer H2 Owner's Manual - Page 303

Tow/Haul Mode Tow/haul is designed to assist while your vehicle is pulling a large or heavy load or trailer. Tow/haul is most useful while pulling such a load in rolling terrain, in stop-and-go traffic, or when you need improved low-speed control, such as when parking. The purpose of the tow/haul mode is to do the following: Press the button on the instrument panel to the right of the steering wheel to enable the tow/haul mode. • Reduce the frequency and improve the predictability of transmission shifts when pulling a heavy trailer or a large or heavy load. • Provide the same solid shift feel when pulling a heavy trailer or a large or heavy load as when the vehicle is unloaded. • Improve control of vehicle speed while requiring less throttle pedal activity when pulling a heavy trailer or a large or heavy load. Tow/haul is designed to be most effective when the vehicle and trailer combined weight is at least 75% of the vehicle's Gross Combination Weight Rating (GCWR). See "Weight of the Trailer" later in this section. A light on the instrument panel will illuminate to indicate that tow/haul mode has been selected. Press the button again to turn off tow/haul. The indicator light on the instrument panel will turn off. The vehicle will automatically turn off tow/haul every time it is started. Driving with tow/haul activated without a heavy load or with no trailer will cause reduced fuel economy and unpleasant engine and transmission driving characteristics, but will not cause damage. 4-77