1991 GMC C1500 Grinding noise

OROSCO01

MEMBER
1991 GMC C1500
5.7L
V8
RWD
AUTOMATIC
200,000 MILES

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.

3 Replies

HMAC300

MECHANIC
48,601 POSTS

Check yore brakes it's probably the brake squealers you heard that stopped when the brakes were applied.

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Monday, April 21st, 2014 AT 3:29 PM

OROSCO01

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11 POSTS

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.

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Monday, April 21st, 2014 AT 5:28 PM

CJ MEDEVAC

MECHANIC
11,005 POSTS

SNATCH YOUR BELTTURN ALL PULLEYS BY HAND LOOKING FOR NON-SMOOTH TURNINGSIDEWAYS TRAVEL/ MOVEMENT----WOBBLESEE 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

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THE MEDIC

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