The selling trucks to everyone was probably more due to that fact that in 1964 the US imposed a 25% tax on imported light trucks to retaliate for a European tax

The selling trucks to everyone was probably more due to that fact that in 1964 the US imposed a 25% tax on imported light trucks to retaliate for a European tax on US chicken (google chicken tax). This highly motivated domestic manufactures to promote truck purchases (and later SUVs). 60 years of marketing and here we are. The tax is still in effect.