my ds who is 3 rides in my car with the gn and dads Chevy s10 crew cab in efta. He also has another ff seat in grandmas and aunts cars. He is on the top slot in grandma and aunts but just moved there. I'm trying to figure who gets this seat. I love the efta however it is a larger seat for the vehicle it is in. In the snowy weather I want my son as safe as possible. That said the Chevy truck does not have latch so the seat can not be tethered. Which seat would do better not tethered. The seats in the other cars are both sceneras. I don't believe the gn woukd fit in the truck bc the middle seat goes in more narrow and gn has to be fully on seat. .