It's definitely true that it was the VW's breakout success in the US which - on top of inspiring the Chicken Tax - cued a full lineup of competition from all of the Big 3 (two from Chevy!).
Because Wikipedia overlooks it in that section, here's the Dodge offering from that period:
https://en.wikipedia.org/wiki/Minivan#Predecessors
It's definitely true that it was the VW's breakout success in the US which - on top of inspiring the Chicken Tax - cued a full lineup of competition from all of the Big 3 (two from Chevy!).
Because Wikipedia overlooks it in that section, here's the Dodge offering from that period:
https://en.wikipedia.org/wiki/Dodge_A100