Curt 11380 hitch, plus ballmount. Used on my 2004 to tow a sailboat from WI to FL. I took it off when I traded in the 2004, and never found a need to put it on my 2008. Also fits 2005-2006 Corvette except with the upgraded exhaust.
How much did the boat and trailer weigh?
My manual says this vehicle was not intended to tow any kind of trailer. That being said, I bought a Corvette hitch for my 08 base and have easily towed my matching CanAm motorcycle trailer to offset the lack of trunk space when the top is down. Would like to tow the whole CanAm Spyder motorcycle sometimes.