:whs:They can go off your vin# also.,but my 03 7.3 is VDH5.The PCM code is on the sticker directly on the PCM. You can pull the PCM and verify what it is.
Most likely yours is a VDH5, since that's what most 2003's with automatics had.
Hippy trucks ruin everything LOLUnless its a Kalifornia truck....