For those in the north east Texas area - or passing through - I highly recommend Greenville Ford on I-30. They have never let me down and don't give any BS. They recently changed service advisors, but the new guys are just as helpful as the old ones. (The technicians didn't change that I noticed.)
They even do price matching on certain items such as tires. I have talked to people in the waiting room and some have come from up to 50 miles away (Dallas) to get the cheaper prices and better service. If that doesn't say it all, I don't know what will. I also like the buy five oil changes, get the sixth free - on gas vehicles. I'll have to ask them if they'll do it on diesels as well.
Of course, Greenville isn't a huge city (approx. 30k people) so they have to be good because everyone knows where they live!
The only downside is they only have two HD diesel techs at this time. So, if a lot of diesels come in at the same time, it could take a bit.