2003 GMC Sierra hum

2003 GMC SIERRA
158,000 MILES • V8 • 4WD • AUTOMATIC
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BMAN36
  • MEMBER
  • 1 POST
when i accelerate or brake i hear a sound of a cupped tire hum coming from the rear of vehicle. just changed brakes but did it before. seems to be no vibration, just the noise. kind of like a bearing with no grease or oil. u-joints?
Mar 25, 2008 at 6:42 PM
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MASTERTECHTIM
  • ✓ASE Certified Mechanic
  • 4,750 POSTS
  • ASE Certified Mechanic
most likely its the rear end pinion bearings. slight on and off the throttle usually makes the noise come and go. hope this helps
Mar 25, 2008 at 7:11 PM
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