2000 GMC Sierra 1500 Pickup Owner's Manual - Page 253

yellowblue Three important considerations have to do with weight: Tow/haul may be turned off by pressing the button again, at which time the indicator light on the instrument panel will turn off. The vehicle will automatically turn off tow/haul every time it is started. Tow/haul is designed to be most effective when the vehicle and trailer combined weight is at least 75% of the vehicle's Gross Combined Weight Rating (GCWR). Tow/haul is most useful under the following driving conditions: D the weight of the trailer, D the weight of the trailer tongue D and the weight on your vehicle's tires. Tow/Haul Mode (If Equipped) Tow/haul is a feature on automatic transmission equipped vehicles that assists when pulling a heavy trailer or a large or heavy load. The purpose of the tow/haul mode is to: D When pulling a heavy trailer or a large or heavy load through rolling terrain. in stop and go traffic. D Reduce the frequency and improve the predictability D Provide the same solid shift feel when pulling a of transmission shifts when pulling a heavy trailer or a large or heavy load. heavy trailer or a large or heavy load as when the vehicle is unloaded. throttle pedal activity when pulling a heavy trailer or a large or heavy load. D When pulling a heavy trailer or a large or heavy load D When pulling a heavy trailer or a large or heavy load in busy parking lots where improved low speed control of the vehicle is desired. Operating the vehicle in tow/haul when lightly loaded or with no trailer at all will not cause damage. However, there is no benefit to the selection of tow/haul when the vehicle is unloaded. Such a selection when unloaded may result in unpleasant engine and transmission driving characteristics and reduced fuel economy. Tow/haul is recommended only when pulling a heavy trailer or a large or heavy load. D Improve control of vehicle speed while requiring less Automatic transmission equipped vehicles are provided with a button at the end of the shift lever which when pressed enables tow/haul. When the button is pressed, a light on the instrument panel will illuminate to indicate that tow/haul has been selected. 4-57