Well i owned an hummer h3, also driven H2.. Both are very good in offroad..H2 will be little bit heavier but still it has v8 6 and 6.2 engines so ones it lifted it can do offroad very well.. H3 3.7 engine has 240Hp so pretty good enough for offroad. Also H3 comes with V8 5.3L. GM stops production of hummer not because it's performance because of Low fuel efficiency.
Are you talking about old bronco which was discontinued after 96 or the new one they launched in 2021? Also Sierra??? Do u know how bad it's approach angle and wheel base for offroad.. I'm not talking about going over the pavement or gravel roads.. Proper off road like Mudding, Dunes, Rock crawling. Sierra is good to deliver stuff like a truck unless it's modified to offroad.