I would be hesitant of buying an Ascender because just how much of the vehicle is GM parts? With the way Isuzu is looking (they've already left the Canadian market), their days appear numbered in terms of SUVs.
It's surprising that we actually have an Isuzu dealership here in the area. However it's also part of a Mercedes-Audi-Porsche dealership, so you'll never see an Isuzu out front along the street for anyone to see.
Most people don't know Isuzu exists, so the Ascender is doomed from the start. I'm surprised they even added the 5-passenger model, they were originally only going to sell the 7-passenger one.
I've only seen 2 Ascenders. Ever. And they're the ugliest of the GMT360 vehicles honestly.