2002 chevy truck repair

2002 CHEVROLET ASTRO
120,000 MILES • 6 CYL • 2WD • AUTOMATIC
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KATHY J
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recently replaced the alternator, now have a roarin sound, like big tires on the road.....so now do i need to replace idler pulley bearing on 2002 chevy silverado? thx, kathy j
Jan 22, 2011 at 4:54 PM
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JACOBANDNICKOLAS
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Kathy:
If the sound wasn't there before you replaced the alt, chances are you got a bad alternator. Remove the belt and spin the pullies to see if you can duplicate the noise.
Feb 14, 2011 at 4:37 PM