Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
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Do you have rear drums brakes , or rear disc brakes? could have either ones in those years.
When you installed the front brakes, did you make sure the backing plates are not touching the rotors, or the brake pad clips are not touching the rotor?
Drums on back!! Yes I checked the backing plates and pad clips.
Have you had the rear drums off to inspect? Inspect for rust build up on the edge of the Drum to backing plate??
Can you duplicate the grinding noise if you have all four wheels up in the air on a lift or jack stands? You may need to do this to isolate which wheel is causing the noise.
Use a stethoscope to listen to the front diff housing , or put a long piece of vacuum hose on the front diff vent to listen while you drive. The side bearings fail on these models allot. The front driveshaft always turns even if it is not in four wheel drive. This can spin the front diff at a slower speed and make a grinding noise audible at slower speeds even in 2 wd.
Pull the drain plug out of the front diff to inspect for metal shavings.
10-4 thanks Hal