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.

Monday, April 21st, 2014 AT 2:35 PM

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.

Was this

answer

helpful?

Yes

No

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

OROSCO01

MEMBER
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.

Was this

answer

helpful?

Yes

No

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

CJ MEDEVAC

MECHANIC
11,004 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

KEEP US POSTED

THE MEDIC

Image (Click to make bigger)