I have a 2007 ford expedition xlt, I can't tell if I have the 6000 lb tow or 9000 lb tow package and I can't find anything that that specifies the differences except the 4 and 7 pin connector, I have the 4 pin. I was told by the local ford that they don't know, no surprise there even when I gave them my vin, and because I have a spot to plug in the aftermarket trailer brake controller they think I have the 9000 lb tow. Can anybody tell me what to look for? I already tried the sticker in the driver's door like suggested and it doesn't say.