2008 trailblazer whirring noise coming from the radio

5

Asked by Jun 15, 2013 at 12:48 PM about the 2008 Chevrolet TrailBlazer LT1

Question type: Maintenance & Repair

I have a 2008 trailblazer. When the car is running and the radio is on, I am getting a whirring noise from the speakers, also when you step on the brake you get a tick sound, and when I  turn the headlights off and on the noise tends to get louder. The only thing I have done recently, is I have changed the right headlight bulb that is all.
You can also hear it get faster when the engine goes faster

1 Answer

355

Most likely culprit is the alternator, did you replace it recently? Some vehicles have a condenser for noise suppression. Is the radio original equipment? See if a radio installation place can probide a noise suppression device.

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