TOYOTA 2010 Highlander - Manual (Page 233)

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2-5. Driving information
CAUTION
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Trailer towing precautions
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Follow all the instructions described in this section. Failure to do so could
cause an accident resulting in death or serious injury.
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Exceeding the towing capacity, GVWR or GAWR can cause an accident
resulting in death or serious personal injuries.
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To avoid accident or injury
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Do not exceed 45 mph (72 km/h) or the posted towing speed limit, which-
ever is lower. As instability (swaying) of the towing vehicle-trailer combina-
tion increases as speed increases, exceeding 45 mph (72 km/h) may
cause loss of control.
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Do not exceed the trailer hitch assembly weight, gross vehicle weight,
gross axle weight and trailer tongue load capacities.
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Never load more weight in the back than in the front of the trailer. About
60% of the load should be in the front half of the trailer, and the remaining
40% in the rear.
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Do not use cruise control when you are towing.
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Slow down and downshift before descending steep or long downhill
grades. Do not make sudden downshifts.
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Avoid holding the brake pedal down too long or applying the brakes too
frequently. This could cause the brakes to overheat and result in reduced
braking efficiency.
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Do not tow the vehicle with the compact spare tire installed.
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Hitches
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If you wish to install a trailer hitch, contact your Toyota dealer.
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Use only a hitch that conforms to the gross trailer weight requirement.
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2.7 L 4-cylinder (1AR-FE) engine: The towing capacity of 3500 lb. (1500
kg) can only be guaranteed when using a genuine Toyota hitch assembly
or equivalent.
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3.5 L V6 (2GR-FE) engine: The towing capacity of 5000 lb. (2000 kg) can
only be guaranteed when using a genuine Toyota hitch assembly or equiv-
alent.
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Follow the directions supplied by the hitch manufacturer.