[sleepyalero]

my car has squeaked before while driving. it could be the little medal pieces that hold the brake pads in the caliper...

also could be built up brake dust... when ever i take the brakes off my car i take the pads out of the caliper, and run a flat head around the edges and through the middle of the pads to clean all the break dust out/off around the edges.

other then that, idk.

put the car in neutral, jack up that one side, take wheel off, and spin to see if you can hear it, then try to identify the problem from there.

OHH. also could be a rock in your caliper. it might seem like a rock cant get in there, but trust me it can.

my buddy worked at firestone and i had a rock in my right rear caliper before hes like nooo nooo there cant be a rock in there thats impossible, im like okay... i bet when i take my caliper off a rock will fall out and hit the ground.. hes like okay man w/e.. sure enough once i pulled the caliper off the rotor, a rock fell out.