Loud noise coming from back end This just started today so I'm still looking into the situation, but I figured I could get some general feedback. I don't have a expanse of mechanical know how but I try my best. It's an 02 Envoy, that when making sharp left turns I hear a loud metallic ding...

Yesterday while driving for no apparent reason the tailgate ajar alarm started going off, door hasnt been opened in months well since winter started. I've tried opening and closing etc., and it still continues to go off. I tried opening the roof and rolling down the rear window but now my rear...