We've posted similar information here at InsideEVs earlier this month, but now we've obtained official 2016 Chevrolet Volt dealer slides that make it oh so easy to figure out when ordering a 2016 Volt will be possible in the state in which you reside.
DOSP = Dealer Online Service Program
So, orders can be placed in California starting on May 28, with production for California deliveries set to begin in August.
Nationwide orders can be placed beginning October. Those vehicles will enter production in November.
If you don't reside in the early launch states, then it's likely you won't receive a 2016 Volt until very late in 2015 or early next year.
Some additional graphics presented below:
2016 Chevy Volt Colors/Interiors/Etc
2016 Volt Ordering Guide