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Humming noise

Tiny
LANCE39ER
  • MEMBER
  • 2006 PONTIAC GRAND PRIX
  • 3.8L
  • V6
  • 2WD
  • AUTOMATIC
  • 186,000 MILES
No engine light on. When I'm accelerating at 30 mph and cruising, I feel a slight vibrate and humming that's only heard with the windows up. If fall below 30 mph or above it stops humming. Same thing at 41 mph. What wrong with it?
Monday, July 29th, 2019 AT 7:20 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Welcome to 2CarPros.

Other than speed, does the sound change pitch or change when turning, accelerating, or stopping? Often times, a wheel bearing will make a humming noise when they start going bad, but the pitch will change when turning.

Also, if you could, let me know approximately where the sound is coming from.

Let me know.

Joe
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Monday, July 29th, 2019 AT 8:04 PM

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