I have no idea if this is true, but when I was talking to the dealers about my initial build that had the Elite trim, they said the Elite package containing HK19 was an error/typo. But also claimed that if it turned out to be true, the price would be adjusted upon arrival of the truck.
It does make sense that it is a typo though. The Elite package is $2,145 and comes with the Multi-Function Tailgate ($1,095) and the Bed Utility Group ($545). That's already $1,640 without including the Pedal Kit, Headliner, Premium Seats, and Jeweled Shifter. Including the HK19 would make that $2k price be an insanely too good to be true value.