I asked for the same info and was told that the plant doesn't often update the codes which is another frustration for the dealer(s). I find that hard to believe, but... you never know. The VON is just an order number. The "D" means they accepted the order so a VON is not a guarantee. Apparently the "D" is the guarantee, if that makes sense. I'm sure there are other on the forum that have better experiences than I've had that can clarify. This is from another thread from a few years back. I believe it is still accurate:
Unscheduled --
BX – good order available for scheduling
BB – fleet order only – review by Bid Dept
BD – special equipment processing
BE – edit error – coding error must be corrected before schedule
BG – order has passed edit but not considered for scheduling
BG F – finance hold – automatic cancellation after 15 days
BG B - build out hold
BG L – material restriction hold
BG M – material hold (fleet)
ZA - cancelled order
-- Scheduled --
C – tentative schedule
D – firm schedule; number is assigned
D1 – gateline: plant has sequenced the unit for production
-- Build --
E – framing
F – paint
G – trim
-- Built --
I – unit is pending final inspection
J – vehicle has passed final inspection but not released to carrier
JB – shipped to body vendor
JE – shipped to emissions
JJ – consigned body vendor
JS – shipped to storage
KZ – released by plant and invoiced
-- Traffic Codes --
KZ L – released but not shipped
KZ M – first rail departure
KZ N – first rail arrival
KZ O - delayed/received
KZ OA – plant hold, quality audit
KZ OB - zone or dealer hold, sales hold, vehicle prep hold, tax hold, finance hold, dealer refusal, diversion hold, vehicle diverted, derailment hold
KZ OC – carrier delay hold, rail car shortage, bad load, insufficient load, inclement weather, need shipping order, manifest order, strike-bound hold, emission or safety hold
KZ OE – misdropped or misshipped vehicle
KZ OF – shipped air freight, stolen vehicle recovered, show vehicle test info code, vessel sailed
KZ OG – damaged vehicle, stolen vehicle, abandon to carrier, vehicle scrapped, donate vehicle, repair and auction