Question about Oldsmobile Bravada

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I have a loud tapping noise sometimes, coming from under my dash (drivers side). It sounds as if someone is tapping with a hammer on the plastic. I have a 2002 Ols bravada. It it safe to drive?

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  • Anonymous Sep 29, 2008

    does it stop when you change the a/c to defrost?

  • mrauber Dec 29, 2008

    I have the same problem, only my Bravada is a 96. The heater also doesn't work.

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The AC/Heater unit has electric motors the open and close all the vents and heat to cold doors. when these electric motors begin to open or close past their stop points, the motor try to continue to open and close itself properly, thus fourth its tapping all the time. to see which one it is, turn the heater control to cold and slowly to hot. most of the time, its the heater door. if not, do the same with the vent control. the problem is common withe the GM SUV's.

Posted on Feb 05, 2009

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Posted on Jan 02, 2017

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