My wife has a 2016 Suburban and its time for a trade. One of the things I hate is dealing with car salesmen. Is there any Aggies or Aggie owned dealers, or just a dealer in general that you've had a good experience with? She wants to go with a GMC AT4 with the diesel. Very few are out there right now and we may just have to order one. We are in North Texas. Thanks in advance!