With surge breaks and a 2022 you should be ready to tow as long as you get the Kia 7-way harness then something like this for you 5-pin:
The Trailer Sway Control is brake based so it should work fine for a boat. You might want to consider towing dry when you can to stay under the 5,000.
If you get the Kia branded tow hitch receiver it will be in the bumper. If you get an aftermarket one it will hang below the bumper so you might want to consider a ball mount with around a 2" rise to keep your boat trailer level.
Since it's a boat you probably won't have enough tongue weight to notice too much sag, but if you do, I recommend the AirLift 1000 bags that works great with the standard springs to give you a little extra stiffness for weight of passengers and cargo when towing the boat.
Since there is no driving mode for towing, I would suggest the following:
- Set Smart mode driving - let the Telluride decide how much power
- Disable Autostart-stop - Some people find this annoying anyway because it shuts off the car at idle by winding down the starter and you have to lift your foot off the brake to start it again, but if you are towing you might need more instant pickup when the light changes to risk getting rear ended. It’s a button right next to your leg that you have to press every time you start the vehicle unless you use the card/coin hack posted on this forum.
- Disable the rear parking sensor - The Telluride doesn't know something is back there so when you backup you will go nuts with the camera and warning beeping at you.
- Turn off the auto-hold - I prefer to have my foot on the brake.
- Avoid using Smart Cruise Control - Just to remain fully aware and don't get distracted since you have added weight, if you choose to use regular or smart cruise control, I would increase the setting for the distance from the vehicle in front of you since you need more distance to stop. You might be able to switch to the Standard Cruise Control, but I would just avoid cruise control altogether when towing.
Lastly, if you tow a boat regularly, then chances are you might be going on a wet boat ramp. To make full use of your AWD on an incline and to make sure your vehicle braking works well along with the trailer surge breaks, be very mindful of the tire wear and replace with good quality tires that get you good traction. AWD enhances the tire traction by sensing slippage and adjusting power to the other wheels. It can't enhance bad traction, only makes it worse.