speaker buzz on acceleration

5

Asked by Guru95W4XW Dec 31, 2020 at 11:17 AM about the 2010 GMC Yukon XL Denali 4WD

Question type: Maintenance & Repair

Ok, here's a good one for you gurus. I've got a buzzing noise coming from the
right front speaker only. It happens when you accelerate off idle. It doesn't
matter if the radio is on or off. Here's the really weird thing; if you open any one
of the doors or the rear hatch the noise completely goes away. If you open the
hood the noise is still there. Doesn't matter if the dome lights are on or not.

3 Answers

154,575

In the old days that was caused by a bad noise suppressor in the ignition system. I'd guess you have a bad ground. Probably in that door. Is this the factory stereo or an aftermarket stereo? Hope that helps! Jim

5

It does act like ignition interference. The buzz occurs right off idle when the engine is under load. This would be when the ignition system is drawing some amps. I just did a DOD/AFM delete on this motor with new cam, lifters, VLOM delete valley plate, spark plugs, wires, head gaskets, ecu reprogram, etc. Other than that, everything else is stock. Stock radio/nav system. I unplugged the alternator and noise still there. It's not a load buzz, just an annoying buzz that sometimes you have to listen for, but it's there. What I need to know is .... Why does the buzz completely disappear when any one of the 5 doors is opened?? I need some electrical whiz kid to "splain dat one to me". The very moment I crack one of the doors open and the "door open" light comes on in the dash the noise immediately goes away.

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