The Sienna manual (for both generations, and all model variations) does specify a towing limit of 2000 lb (907 kg) without the towing package, and 3500 lb (1587 kg) with the towing package.
There is indeed a towing package
, and they're not talking about the hitch or a wiring adapter for the trailer lights
. Instead, they mean a higher-capacity transmission fluid cooler (and perhaps other components, depending on year). In practice, nearly all later Siennas have this package; I did not explicitly purchase it for my 2004 Sienna LE (it was not offered), and Toyota Canada later confirmed that all 2004 Siennas sold
in Canada included the package automatically (that's why it wasn't offered in the order form). At least some first-generation Siennas used a separate transmission fluid cooler for the towing package (not just one built into the radiator); that may include 2002.
Toyota's customer service line (and presumably the dealer) can confirm the equipment on a specific vehicle, given the VIN
code. If I had a 2002, I would just call and check.
If a second-generation (2004 or newer) Sienna needed to be shifted to second gear
on a hill with roughly one-ton trailer, it must be an extraordinarily steep hill or just a low road speed. The first generation (including 2002) had less power, but even they are successfully used to tow 3000 lb trailers. At highway speeds in the Rocky Mountains I don't need to manually shift to second for adequate performance (that is, passing everything else with a trailer...) even with my 3000 lb 17' Boler
... but at lower speeds the lower gear would be reasonable.
Individual condition vary, of course, but towing 700 lb less
than my current trailer with my 2004 Sienna LE wouldn't concern me at all, and Surfside seems like a good match for the 2002... but it's always good to check.
The Sienna manual
lists both the tongue weight
limit (350 lb or 158 kg with the towing package and without a weight-distribution system) and GVWR (8700 lb or 3946 kg with the towing package, two wheel drive). It would likely be impossible to load a Surfside enough to exceed the GVWR of this second-generation Sienna (you would have to exceed the trailer's GVWR), even with a full passenger+cargo load in the van, but the tongue weight
is worth checking; the first-generation Sienna's limits are not much lower, if at all. (In the 2004 manual, all this is in the "Starting and Driving" section under "Trailer towing").