On Wed, 26 Mar 2008 16:57:06 -0700 (PDT), Uwpgrad
wrote:

I hope someone may be able to help me out with this question. I have
a Sport Nautique and I am thinking of buying a new vehicle to pull
it. Right now I have a GMC Serria (5.3L V8) and I'm looking at trying
to save some money by buying more of a mid-size SUV (Highlander 3.5L
V6) to save on gas because we have to travel a bit of distance just to
get to the boat. The new Highlanders have a standard capacity of 2000
lbs and a maximum of 5000 lbs. The boat with full fuel, gear, and
trailer are 4000 lbs. What are peoples options for the Highlander to
pull it?

I can't speak to your exact situation, but I can tell you based on
conversations with others that the 3.6 will tow your boat fine - just
don't expect to get better gas milage towing.

Stick with the 5.3 - believe it or not, towing you will get better gas
milage.