I have a loud tapping noise coming from teh dashboard of my 2003 Chevy Trailblazer.

Asked by MesaLinda Sep 14, 2008 at 09:54 AM about the 2003 Chevrolet Trailblazer LT 4WD

Question type: Maintenance & Repair

Can you tell me what could be causing this?

7 Answers
145

Mark answered 15 years ago

are you sure its not coming from under the hood a tapping noise usually denote at motor problem but it could also be the a/c relay not working correctly

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65

Nick answered 15 years ago

If it is coming from under the dash it could be the speedometer cable.

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855

Rich answered 15 years ago

whem does it happen? a certain mph? certain road? bump? under acceleration?

2 people found this helpful.
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275

Adam answered 15 years ago

Is it from the left side or the right side of the dash? Does it increase intensity when you turn your fan up? It could be something stuck in the blower motor.

4 people found this helpful.
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90

pub answered 11 years ago

It's the mode actuator in the vent system. Whenit goes out and stops tapping air will only blow through the floor vents.

9 people found this helpful.
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20

Guru9C48SH answered 2 years ago

it come on when the key is turned on and will go off in about 5 minutes..

2 people found this helpful.
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