1991 GMC C1500 Grinding noise

1991 GMC C1500
200,000 MILES • 5.7L • V8 • RWD • AUTOMATIC
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OROSCO01
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I bought the truck 3moths ago everything was going fine until one day if was driving and as I accelerated I hear a loud grinding noise and a Burnt smell starts coming out. I checked the engine oil, transmission oil,and everything is fine, but I also noticed a squeaking noise started before this.
Apr 21, 2014 at 2:35 PM
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HMAC300
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check yore brakes it's probably the brake squealers you heard that stopped when the brakes were applied.
Apr 21, 2014 at 3:29 PM
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OROSCO01
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Thank you for your input but the noise happened while I was driving and the noise seemed to be coming from the front of the truck.
Apr 21, 2014 at 5:28 PM
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CJ MEDEVAC
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SNATCH YOUR BELT-----TURN ALL PULLEYS BY HAND LOOKING FOR NON-SMOOTH TURNING-----SIDEWAYS TRAVEL/ MOVEMENT----WOBBLE-----SEE IF THE INNER PART PART OF THE A/C COMPRESSOR PULLEY WILL TURN FREELY (THE COMPRESSOR MAY BE SEIZED....IT MAY BE ONLY LOCKING UP WHEN "A/C" OR "DEFROST MODES" ARE USED ON YOUR HVAC)

THE A/C PULLEY (CLUTCH) MAY TURN FREE IF THE COMPRESSOR IS LOCKED

COULD BE THAT DURING LOCK UP---THE BELT IS SMOKING

SENDING YOU A PIC OF A TENSIONER PULLEY I TOOK A PIC OF (MAY OR MAY NOT BE RELEVANT TO YOU).....MAY MAKE YOU CHECK STUFF MORE THOROUGHLY

KEEP US POSTED

THE MEDIC
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Apr 21, 2014 at 7:33 PM