What is causing a knocking in my dashboard
of my 2007 Chevrolet Impala, and what
needs to be done to fix this problem?
if the noise is happening when you turn your temperature from hot to cold or cold to hot that would be your blend door actuator
It’s the blend door actuator servo. The plastic gears inside are stripped out. No big deal. Remove the glove box to access it. Unbolts with two bolts, unplug wire is all there is to it. If you don’t want to replace it just yet simply unplug the wire and the tapping will stop but of course the fresh air intake door won’t work.
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