2009 Toyota Sienna Owners Manual - Page 264

2-5. Driving information CAUTION n To avoid an accident l Do not exceed 45 mph (72 km/h) or posted towing speed limit, whichever is lower. As instability (swaying) of the towing vehicle-trailer combination increases as speed increases, exceeding 45 mph (72 km/h) may cause loss of control. l Slow down and downshift before descending steep or long downhill grades. Do not make sudden downshifts. l 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. 236