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Originally Posted by gramma
I bought an '05 burb and after a month or so there was a chirping noise in the engine. Took it to my mechanic's I call the boy's and they replace the alt. belt and tightened some torque thing. It was fine for a few miles then it happened again. Put on a new belt and after a few miles it was back. They think the belt might be the problem, it is not GM replacement. Could that be it or should they look for something else. They are both Chevy truck lovers and they say they have never had this happen to them. Can you give me a hint at what it might be so I can act like I know something and talk the talk.
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this is usually a pulley bearing. do the boys have a stethoscope ?