Hi there I have the same noise coming from behind the light cluster in my GX4, I have located the bolts, but they seem to be as tight as they will go, I am worried about over tightening in case of causing a worse problem. It seems to me that the two pieces which are bolted together, may have had something between them and this has either dried out or something similar, as mine is worse during hot weather. Don’t know what your views are. Will have one more try to tighten the bolts and keep my fingers crossed.

are you able to explain how you did this. I have the same issue.