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Noise when accelerating

Tiny
DON329
  • MEMBER
  • 1995 GMC SUBURBAN
  • V8
  • 4WD
  • AUTOMATIC
  • 236,500 MILES
I just purchased a 1995 GMC Suburban with a 5.7 engine and today I noticed a loud buzzing sound as I accelerated from a dead stop. The sound goes away after 5-8 seconds. It is coming from under the drivers seat. Is this an issue with the tranny or rear diff? Sorry. There are about 150,000 miles or 236,500 kilometers. Yes, I am in Canada.
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Tuesday, December 28th, 2010 AT 3:05 AM

1 Reply

Tiny
SEM
  • MEMBER
  • 1 POST
I had the same problem. I found that the fuel lines were touching the floor board and you were hearing the fuel pump pulse. Chech the lines that run from the frame to the back of the TBI. Mostly check right at the floor board and tranny hump on driver side. Hope that helps!
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Tuesday, September 13th, 2011 AT 2:19 PM

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