Thanks for your reply. I did call the place I had my brakes done about 6 years ago,and he told me there were no sensors in my rear rotors, and the sound could be the rear brake shoes.
...But after driving around last night, I want to change my symptoms from squealing noises to a rubbing kind of noise. When I slow down or speed up, the corresponding noises seems to go faster or slower with my speed of the tires,if that makes sense.
So it seems to be more of a rubbing,and not grinding or squealing noise. I still want to get my tires rotated, so I'll have the guy drive it in the lot and see what he thinks.
And since it's been about 6 years since my last brake job, maybe I'm hearing the pads or shoes,but would'nt i just hear that when I apply the brakes, which still work pretty good,except my emergency brake,which is hard to engage and disengage. maybe time for new brakes.
Happy new year!