Lydia De Jorge Mar 1, 2020:

@Robert También dice:Aseñorado/da: adj. Dicho de una persona ordinaria: Que imita los modales del señor.

Robert Carter Mar 1, 2020:

@Lydia "Aseñorado" also means "Parecido a lo que es propio de señor" (DRAE, https://dle.rae.es/aseñorado?m=form), and consequently it's often meant in a derogatory way to mean stuffy, dated, boring, old-fashioned, conservative, etc. I think the idea here is a truck design that doesn't take any risks, that sticks to a tried-and-trusted formula, so although it's refined it's also kind of dull, like Buicks and Cadillacs used to be (they seem to have changed their design philosophy in recent years).
I, for one, have never heard it used in the sense you've described (pretentious) here in Mexico.

Lydia De Jorge Mar 1, 2020:

Se refiere a un diseño pretencioso que quiere parecer lo que no es. Creo que 'pretentious design' puede servir.