have the 2021 trailblazer as well. lucky daughter you have there. do you need your setup to include a screen? if not then a garmin dashcam mini 2 will be perfect but it needs phone connection. i think the kids know how to do that already. otherwise this VIOFO A129 Pro Duo is the exact model i have. it's 4k p at the front and 1080 p at the back. good quality.