Here is what I know after 1 week on ownership of EX with factory tow package. ONE: I am an idiot for not pulling the cap off the Four pin, assuming it was a 5, (with a class three and 5000# tow capacity). Guess that extra fifty cents cost was a deal killer to the Kia engineers! TWO: Kia dealership will NOT touch it, (to convert to a 5 or 7 pin at this point, per conversations and calls they made on my behalf, "no plans to address this problem yet", (and if you have brakes and need to back up, better keep that lockout key for your trailer handy). Dealer said they are on a conference call this coming Friday and will bring it up again. THREE: I have spoken with at least 5 trailer/tow/auto specialty shops and most "are looking into it", but few are calling back...nothing out there to look at yet. I have one guy who said that he can convert to a five or seven, but that the bracket that comes from the factory is welded to the frame and the seven pin will not fit; he could hang it below, no thanks, or live with the flat five, which is all I have to have, (Bass Cat single axle surge brakes), and could widen the grove the four pin sits in stick a flat 5 in there. Of note, the back up lights on the Telluride are in the lift gate, so see that the wires come out of the inside top of the gate, lots more labor to route, he said. The guy has concerns, as I, about voiding any warranty and "finger pointing" issues that may arise if something happens down the road. I will call the dealer again on that this week. FOUR: I pulled an 18' bass boat today, probably 3800# range loaded, about 10 miles to a local lake. IT had lots of get up and go, I breezed by an Explorer pulling a Ski boat, at the next light when they caught up they were eyeballing the KIA up and down, ha ha...already have had several of those. and FIANALLY I have to get this resolved! I have a uphill side entry garage with around 3" clearance on each side, so going 90 degrees backing into driveway from the street to another 90 degrees to garage uphill, does not usually happen without a forward/reverse adjustments, and constantly getting in and out of the vehicle to take lockout key in and out is for the birds. THIS FOUT PIN ISSUE NEEDS TO BE ADDRESSED. This is going to became an issue only if they DO NOT QUICKLY make a dealer authorized conversion available.