Ford 2006 E-150 Owner's Manual page 117

Payload – is the combined weight of cargo and passengers that the
vehicle is carrying. The maximum payload for your vehicle can be found
on the Tire Label on the B-Pillar or the edge of the driver's door. Look
for "THE COMBINED WEIGHT OF OCCUPANTS AND CARGO
SHOULD NEVER EXCEED XXX kg OR XXX lb." for maximum
payload. The payload listed on the Tire Label is the maximum payload
for the vehicle as built by the assembly plant. If any aftermarket or
dealer installed equipment has been installed on the vehicle, the weight
of the equipment must be subtracted from the payload listed on the Tire
Label in order to determine the new payload.
The appropriate loading capacity of your vehicle can be limited
either by volume capacity (how much space is available) or by
payload capacity (how much weight the vehicle should carry). Once
you have reached the maximum payload of your vehicle, do not add
more cargo, even if there is space available. Overloading or improperly
loading your vehicle can contribute to loss of vehicle control and
vehicle rollover.
2006 Econoline (eco)
Owners Guide (post-2002-fmt)
USA (fus)
Tires, Wheels and Loading
117