I had a 2006, double cab,V8, it was a really good truck.
The only real complaint i have about it was that it eats tires!
Towing capacity is 6500 lbs, but as soon as you hook the trailer to it, expect your gas mileage to be about 10mpg! Also do not use cruise control while towing, because that that only make the fuel economy suffer more!
Mine was a lease, and i never had to do any thing in the 45000 that i had it for, other than tires!