We ordered a 2015 GMC Sierra 3500 Denali SRW and just took delivery of it Thursday evening. The level of comfort and included technology is overwelming. It is a piece of artwork. One of the few negatives we have found is the turn signal led lights in the new style chrome/folding mirrors. These leds on the drivers side mirror are blinding when activated during night driving (passenger side not bad). It's difficult to see the area you are turning into on a left hand turn. The 2011 Silverado 2500 we traded on it had turn signal lights in the mirrors and they were in no way distracting as compared to these new ones. Still working on a solution to this situation.
I'm looking forward to my special order coming in. Interesting about the LED's. I hope you are having fun with your new truck (and trailer).