Vehicle opinions wanted

[1974ChevyC10]

ok here is a quick rundown of my latest dilemma.i recently got married i have 2 children of my own and two stepdaughters plus a baby girl on the way the wife is due in about 5 weeks time.i need to get a bigger vehicle that can haul anywhere from 5 to 7 people.obviously my truck is out of the question as it safely is only a 3 seater.what do those of you on here with large families drive?i want to stay in the GM family im considering a suburban \,tahoe,later model rear wheel drive impala or large gm car,extended cab GM truck or astro/safari/GM fullsize van.any suggestions here are welcome and encouraged.