UCF_RosenKnight..... I found this out when I took my HH XLE to get hitch installed. I thought it was prewired....nothing. The guy spent 5 hours on it and added a 7 pin with Curt EBrake system and Curt Hitch. Cost much more than anticipated like $800.00 but given the labor and what he had to do I was ok with that. Uhaul quoted me less but I didn't trust them based on reviews and they could only put a 4 pin in. Haven't tested my hitch yet.