The configurator for the 2021 Trailblazer is up on Chevy's website! From what I've seen of it so far it's well laid out and easy to navigate.
www.chevrolet.com
Build Your Own New Chevy Car, Truck, Crossover, SUV, or Van
Build your own new Chevrolet vehicle. Choose from a range of trims, colors, and options to build your own Car, Truck, Crossover, SUV, or Van.