I purchased it on the A-plan and the dealer had no problems with that, I would think there should be no problem with the other plans.
I bought mine under X-Plan in September 2018 without any issues, though the
2018 F150 Diesels were exempt from any further discounts at that point in time in 2018: See
Post #20 in my
Anyone else in the same boat? thread, where that 2018 offer did specifically exclude A-Plan pricing also.
As far as I can tell now,
2019 F150 Diesels are eligible for all F150 discounts & incentives (I am helping a buddy buy a 2019 F150 Gasoline V8 Lariat right now) as I have not see any exclusions that I saw (like above) in 2018.
@Old Ray just posted an article on
Ford removing the "Fleet order" requirement for the 3.0L PS Diesel in 2019 F150 XLT models -- you can now order a 2019 F150 XLT w/3.0L PS Diesel but you must also order equipment Group 302A (adds features such as heated and power-operated front seat, remote start, 18-inch wheels and chrome trim available only on SuperCab and SuperCrew models) so besides the engine upcharge, the 2019 Ford F150 Diesels can be purchased like any other F150 in terms of A/D/X/Z pricing plans and discounts/incentives.