2001 Chevrolet Blazer Owner's Manual - Page 265

Tow/Haul Mode (V6 Engine, Automatic Transmission Equipped Models) (If Equipped) The tow/haul mode is a feature that assists when pulling a heavy trailer. The purpose of the tow/haul mode is to do the following: The tow/haul mode is most effective when the vehicle and trailer combined weight is at least 75% of the Gross Vehicle Weight Rating (GVWR) and the maximum trailer weight rating for the vehicle. See "Gross Vehicle Weight Rating" and "Trailer Weight" in the Index. The tow/haul mode for hauling a heavy trailer is most useful under the following conditions: D Reduce the frequency of shifts when pulling a heavy trailer, D provide the same shift feel when pulling a heavy trailer as when the vehicle is unloaded, and pulling a heavy trailer. D When driving through hilly terrain at speeds below 55 mph (88 km/h), D reduce the need to change throttle position when This feature is turned on or off by pressing a button on the floor console or the shift knob. When the feature is on, a light located on the instrument panel cluster will illuminate to indicate that the tow/haul mode has been selected. See "Tow/haul Mode Light" in the Index. The tow/haul mode is automatically turned off each time the vehicle is started. D when driving in low speed or stop and go traffic below 55 mph (88 km/h), and D when driving in parking lots. Use the tow/haul mode instead of the previous recommendation to shift to THIRD (3) gear to improve fuel economy at highway speeds and shift performance at lower speeds. Operating in the tow/haul mode when not pulling a heavy trailer will not cause damage to the vehicle, but you may experience reduced fuel economy and undesirable performance from the engine and transmission. The tow/haul mode should be used only when pulling a heavy trailer. 4-49