sunroof rattle

[mccool98ta]

my 2004 avalanche has a rattle that seems to be coming from the sunroof. it gets worse when i open it to vent or open the sunroof to any position except fully open, it may rattle when fully open too but i might not be able to hear it due to wind noise.the position of the shade doesnt seem to make any difference. are there any typical places that suroofs rattle at or any bolts that i might try to tighten? any help is appreciated

[MAGNUM]

[i had a very similar rattle on my yukon. It turned out to be a wire loom directly above the driver's head in the headliner that had come loose. I pulled the headliner down and taped the loom down really good.