Interested in the same info. I've read other places that the OEM light is the most difficult to install, which is why I'm now looking aftermarket. Would love to hear a solution if one exists though, so I'm a big fan of the OEM+ look.
My manual tailgate is very difficult to open regardless of temp, although it's been very warm in PA for the 2 weeks I've owned my truck.
I have to forcibly jerk the tailgate latch and pull the tailgate open all in one motion. Very difficult to engage the opening mechanism.