GMC JIMMY 2002 Manual page 298

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:
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
D
reduce the need to change throttle position when
pulling a heavy trailer.
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.
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The tow/haul mode is most effective when the vehicle
and trailer combined weight is at least 75% of the Gross
Combination Weight Rating (GCWR).
The tow/haul mode for hauling a heavy trailer is most
useful under the following conditions:
D
When driving through hilly terrain at speeds below
55 mph (88 km/h),
D
when driving in low speed or stop and go traffic
below 55 mph (88 km/h), and
D
when driving in parking lots.
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.