2003 GMC Sierra hum

2003 GMC SIERRA
158,000 MILES • V8 • 4WD • AUTOMATIC
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BMAN36
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  • 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
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  • 4,750 POSTS
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