LOL! Thanks, but I just used my iPhone - a 14 Plus Max, at the time.

I replaced the dampener and the tailgate hinge. See parts here: www.gmpartsdirect.com/v-2017-chevrolet-silverado-1500--lt--5-3l-v8-gas/body--tailgate Though you might just need to replace the tailgate hinge.

I'm not familiar with the 2021 setup but, I would think, first check the plastic bushing on the tail gate hinge.

Yes, access to the bolt(s) are behind the tail light. Removing the tail light is a simple task, as is replacing the dampener.

That would be symptom of a bad hinge or a loosened torsion rod. My issue was no dampening upon opening, the tailgate would just fall down as if unassisted. I pretty much just threw everything at it - new hinge, new dampener and new torsion rod, though I think the latter was unnecessary as once I remove and replace the original, re-tightening the bolt, it worked as it should.

Yes, I did replace the torsion rod though I'm not sure if it was necessary. Be sure you have the torsion rod inserted correctly and tightened down. Also, make sure your plastic busing is new, or, at least, it great shape - that's usually the number one culprit in a quick dropping tail gate if everything else is working as it should.

@@MikeBMW I just didn't know where it was and there's no videos on it. How can I tighten it down?

@@jeffreywilson9023 When you remove the tailgate, there are two bolts on the driver side of the tail gate which secure the torsion rod. The torsion rod only fits in one way and can be difficult to reinsert. There is an "up" indicator on the torsion rod head. Best way to reinsert is to place the tail gate with the driver side down, vertically, and carefully slot the torsion rod into its mount and, then, tighten the bolts. There is a small access hole that allows one to guide it in. It can be frustrating until you get it figured out.