Biggest thing is the size allows for a much bigger battery; which means more capacity.

First and foremost it is the mass that defines the range of an EV, closely followed by the aero drag efficiency. Rolling resistance and transmission losses are pretty minor. A mindful driver who doesn't race up to red lights and doesn't mind getting hot on a hot day and cold on a cold day will increase the range by reducing HVAC load. The type of terrain and ambient temperature are factors. I would be surprised if something as inefficient as a truck gets anywhere close to a sedan.

Oh, man! I wouldn't even care if the range were the same as a sedan. El Caminos are cool! I mean, the front is like a car, the back is like a truck!

AFAIK EV pickups lag in efficiency but make up for it in sheer battery pack size. The F-150 Lightning gets 2 miles/kWh (cruising I believe) while a Bolt is probably around 3-4 so be sure to double-check the range compared to the usable capacity ratings on their batteries!

You're confusing mileage and range. Range is a function of the vehicle's energy capacity, whether it be fuel or electricity, whereas mileage relates the energy expended by the vehicle to travel a certain distance.

It might be correct to say an F150 has better range than a Corolla (which might not even be true), just because the F150 has a much larger fuel tank. But, as is obvious, the fuel an F150 expends to travel a certain distance is much larger than that expended by the Corolla, or you'd say the Corolla gets better mileage than the F150.

It's the same in EVs. Simply, an F150 Lightning has a higher capacity battery (fuel tank) than a Bolt, but the 'mileage' of the Lightning is much worse than the Bolt.

The longest range EVs are actually large sedans with huge batteries, see the model s plaid and lucid air (400 mile range).