Nice SUT! Your front windshield was obviously replaced and they did a poor job of replacing the trim pieces. As someone already said, you'll have to stick them to the windshield or they will buzz loudly. Replacing windshields are common on the H2. I'm on my third. Because of the upright angle of the windshield it cracks easily when hit by gravel on the road.
The rails indicate it once had a tonneau cover - they don't come with that rail. The gap on the roof trim is puzzling. Looks like someone punched out your lock in the bed compartment. You can get a new lock from a parts store, however, I don't think that's a very expensive part from GM. Your tires have lots of tread and look brand new in the pictures!
