Well dang, about 90% sure.
Because the standard 13.5K A/C/heat is in the mid position if you only have one unit. Also, the front A/C came with a nice digital controller, not the analog controller like the standard equipment unit that has AC and heat. Thanks...now I am going to have to get on top and take off the covers to check for sure, because it is going to bug me until I verify it.
But I would bet a $1 that dealers don't take the time to move the stock unit to the front and then add the 15K to the middle; it was a Diamond package from the factory, so you my well be right. I did change the main AC/heat to a digital controller so they would play nice with each other and it was a big improvement, MUCH less swing in temps now.
D_B Travelers - 30 nights in 2016... so far. 54 nights in 2015. 2014 Rockwood Windjammer 3001W Diamond Pkg, 2015 GMC 3500HD CC DRW Duramax, Equalizer 14K hitch, TST 507rv TPMS.
"Happiness? A good meal, a good cigar and a good woman - or a bad woman; it depends on how much happiness you can handle."
George Burns (1896 – 1996)