I saw this article that claims .5 for Hummer, .44 for Lightning and .3 for Rivian, but then there are some tests showing Lightning did better at 70mph than Rivian. Rivian range tests do seem to be all over the place and not consistent, likely due to tires.
Rivian says the R1T has a drag coefficient of just 0.30 Cd, much lower than other pickups of the same size, and this simulation seems to prove it's accurate.
Edmunds tests the 2022 Ford F-150 Lightning to see how far it can go on a full battery charge. Most electric cars match or even exceed their estimated range figures, but not all EVs do. Here's how the first electric truck from Ford fared in our real-world testing.