2008 Chevrolet Express Van Owner's Manual - Page 107

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: While activated, the indicator light on the instrument panel will be on. • Reduce the frequency and improve the predictability of transmission shifts, • provide the same solid shift feel when pulling a heavy load as when the vehicle is unloaded, Tow/haul mode will turn off automatically when the ignition is turned off. See Tow/Haul Mode Light on page 3-43. Tow/haul is most effective when the vehicle and trailer combined weight is at least 75 percent of the vehicle's Gross Combined Weight Rating (GCWR). See "Weight of the Trailer" later in this section. Driving with tow/haul activated without a heavy load will cause reduced fuel economy and unpleasant engine and transmission driving characteristics, but will not cause damage. • improve control of vehicle speed while requiring less throttle pedal activity. Press this button located to the right of the steering wheel on the instrument panel to turn tow/haul mode on and off. 2-27