Just read about the aero of a Hyundai Ioniq 6 and the different tricks it uses to get the Cd down to 0.21

https://en.wikipedia.org/wiki/Hyundai_Ioniq_6

I might be worth looking one over carefully for potential aero mods to a pickup.

The replacement of “elephant ear’ outside mirrors
with thin aero shape video cameras
deserves some pondering