Ah yes, SM. You have to just drop your vehicle and (hope) they get to it in the next day or 2. I have a 2015 3500 Diesel Dually work truck. When it had 22K miles on it a check engine light came on in regards to the DEF system. We took it to them 5 more times over the next 30K miles for the SAME issue. Well, on trip #6 we got "we're sorry, your truck is out of warranty and is no longer covered". So, even though the problem started, and was never fixed while IN warranty you're no longer covering it? "yes sir, that is correct". So, we took that truck and paid $2500 for someone to rip the DEF system out. Problem "fixed" and we no longer go to San Marcos. You see what I'm getting at. NONE of the dealers in my area are dependable.
I just dropped my truck off with Ancira in San Antonio (where I purchased it from - and the check engine problem). Hopefully it will be fixed this time, and I've asked them to see if they can fix the XM so I don't have to go back to South Point. Their jaws dropped when I showed them the picture of my dash in pieces. A "good on them" though, at least Ancira has provided me a comfortable loaner on each trip.