like I said, the assembly is not loose. The button itself has a lot of play in it. At idle you can clearly hear it rattle around. It actually sounded like static on the radio. My exhaust is rather loud too, DD and CFR's.
Common problem, I have it too. I took it apart & really saw no way to make it tighter.
Someone a while back posted something about putting an o-ring around/under the button but I never tried it.
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NO, they DON'T all do that!
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It's the first complaint I made to the dealer about my Limited. They said there is no fix. It rattles at idle and going down the highway the rattle turns into a buzz. It's annoying so I just turn up the volume on the radio.
Try bending spring plate to add tension. This way when closed, that tension takes up the slack in lock and quiets down. Add some grease paste too inside lock