Well being that my vehicle was in service for over a week and half the things I asked them to address are still causing me a headache, I figured I'd be a bit courageous today and attempt to tackle the vibration/rattle on the passenger side front door. I assumed ok, try to remove the door panel without breaking anything and the rest should be somewhat easy - a little hot glue and call it a day (granted I'll admit, I wasn't exactly thrilled at the idea of pulling the door apart - side note, it was much easier than anticipated). So after removing a few screws, the panel popped off and with a quick disconnect of the main wiring harness connection, it was time to break out the DIY "skills".
Now here's where my confidence in the service department at my local dealership has been utterly destroyed - the speaker vibration was one of the items I brought to their attention and per the service write up once the vehicle was eventually returned to me, it said speaker inspected, operating within specs. Uh huh... not quite! Let's put it this way, the next time I see "operating within specs" from them, I know that actually means "didn't even bother to look at it." The reason I say this - when I pulled the door panel off, what was loosely sitting there, flapping around but a nice large sticker/label behind the speaker grille!
I thought to myself, no - it couldn't possibly be THAT easy! So before I tried removing the speaker grille off from the main door panel, I pull the label out, snapped the panel back on, turned on some music and shocking - the annoying major vibration and rattling was no more. At that, I decided to just go with what I had... short of bringing the vehicle to have the doors full insulated with sound proofing, this was the easiest (and cheapest) 10 minute fix. Yes, there are hints of very minor vibrations if I turn the sound up loud and with a heavy bass track, but right now the sticker removal has made it at least 90% if not 95% better than it was and I'd rather not spend countless hours chasing every last little vibration since it's now a rare occurrence.