I had similar buzz/squeal a few months ago.  It turned out to be the spring
from one of the pins that hold the brake shoe to the backing plate.  The
'hat' had fallen off of the pin, the pin had fallen out the back of the
backing plate (and thus lost forever) and the little spring was floating
around inside the drum producing a low level squealing sound.

Rick

On Thu, Jun 13, 2019 at 5:43 PM Eric Caron <ericcaron96@comcast.net> wrote:

> Thanks Mark,
>
> It was changed  about 12,000 miles ago.  But the work done at that time
> did not seem of high quality so you never no!
>
> Eric  Caron
> 85 GL Auto
>
>
>
> > On Jun 13, 2019, at 8:37 PM, Mark Tuovinen <aksyncronaut@gmail.com>
> wrote:
> >
> > When my van did that the culprit turned out to be a wheel bearing.  If
> this is what you have make sure to check the hub carefully, on mine the
> shop thought it was ok until they had to warranty their bearing job when it
> failed at which time we got a new hub to use.
> >
> > Mark in AK
> > `87 Westy Syncro
>