1999 GMC Suburban Rear End Noise

1999 GMC SUBURBAN
91,000 MILES • V8 • 2WD • AUTOMATIC
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LORDDOUG1
  • MEMBER
  • 4 POSTS
I bought this truck used and there is a whinning or buzzing noise when the truck is started and continues while the truck is running coming from the rear end.
It sounds like it is coming from the fuel pump, but I never heard a fuel pump make a constant noise while the vehicle is running.
What is going on??
Nov 27, 2008 at 11:57 AM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Do you hear the noise when sitting still? If so, it most likely is the fuel pump.
Feb 17, 2009 at 7:24 PM
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