Toyota 2006 Sienna Owner's Manual page 728

You should know as much about the quality and
importance of proper maintenance of your new
vehicle as the people who built it.
The Toyota authorized Repair Manual
tells you how to maintain your vehicle and
enables you to correctly perform your own
maintenance.
06 SIENNA_U (L/O 0603)
The best way to keep your new vehicle in top
running order is to maintain it properly from
the moment you drive it off the showroom
floor.
The Toyota authorized Repair Manual is
packed with literally everything you need to
know to perform your own maintenance in
virtually every area of your new vehicle.
2006 SIENNA from March '06 Prod. (OM45443U)