FORD F-250 - Manual (Page 233)

Vehicle identification number
The vehicle identification number is
attached to a metal tag and is
located on the driver side
instrument panel. (Please note that
in the graphic XXXX is
representative of your vehicle
identification number.)
Engine number
The engine number (the last eight numbers of the vehicle identification
number) is stamped on the engine block, transmission, frame and
transfer case (if equipped).
XXXXXXXXXXXXXXXXX
Capacities and specifications
233