Intermittent drumming noise from top of dash???

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89Suburban

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Da **** is this noise!!!!! You can hear the headliner fan in the background buzzing but listen for the fingertip drumming noise in the dash?!


 
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89Suburban

89Suburban

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When does it do it?

Been doing it since the cold weather moved in. Most noticeable when you first cold start it. Seems to go away after a bit. Almost makes you think something is loose and rattling.
 

Danny3737

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Do the noise change when you change your fan speed?
 
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89Suburban

89Suburban

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Do the noise change when you change your fan speed?

Nope. Or changing floor to defrost etc stays the same.

Sounds like something rattling against the firewall or something, but on the inside.
 

Danny3737

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Listening it through my Bluetooth it sounds like an exhaust leak.
 

Imup5-0

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Got the same noise but it on happens around 40-55 mph. Started happening in the colder weather. If I hit a bump it will stop for a second. I plan on trying to track it down tomorrow.
 

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