Toyota 2014 Sienna Manual page 739

From the front (AWD models)
From the rear
Using a flatbed truck
SIENNA_OM_OM45483U_(U)
5-1. Essential information
Use a towing dolly under the rear
wheels.
Use a towing dolly under the
front wheels.
If you use chains or cables to tie
down your vehicle, the angles
shaded in black must be 45.
Do not overly tighten the tie
downs or the vehicle may be
damaged.
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