Since asbestos has been banned from being used in brake pads here in
Australia (and I'm sure in many other parts of the world) brake squeal
has been an issue for a lot of vehicles.  Simply changing the pads to
a more expensive compound MAY fix or at least relieve some of the
squeal, we find the cheaper pads give the most brake squeal, obviously
if you're getting ripped off buying your brake pads then you may still
have cheap pads, Bendix ceramic's are our preferred choice.  There are
many other causes however.  You can also buy an anti-squeal spray at
most automotive stores which is the cheapest and possibly the least
effective solution which you spray onto the brake rotors.  In the same
stores you can normally purchase anti-squeal compounds which are
designed to cover the metal side of the brake pads and once dried
turns into a rubbery compound which tries to eliminate the very high
speed vibrations (squeal) that occur between the pad and the caliper/
piston.  A lot of cars are meant to have a very thin metal plate (anti-
squeal plate) clipped on to the metal side the brake pad that
sometimes gets removed inadvertantly when being changed by
inexperienced 'mechanics'.  Worst case scenario is your brake rotors
are grooved (not nice and smooth like they should be, normally from
running the pads out of material at some earlier time) and need
machining or replacing.  As always, there are certain procedures and
precautions you should follow when working on brakes, and unless you
have experience in this area it would be best left to a qualified
mechanic.

Since asbestos has been banned from being used in brake pads here in
Australia (and I'm sure in many other parts of the world) brake squeal
has been an issue for a lot of vehicles.  Simply changing the pads to
a more expensive compound MAY fix or at least relieve some of the
squeal, we find the cheaper pads give the most brake squeal, obviously
if you're paying too much for your brake pads then you may still have
cheap pads but Bendix ceramic's are our preferred choice.  There are
many other causes however.  You can also buy a special anti-squeal
brake spray (CRC brand) at most automotive stores which is the
cheapest and possibly the least effective solution which you spray
onto the brake rotors.  In the same stores you can normally purchase
anti-squeal compounds which are designed to cover the metal side of
the brake pads and once dried turns into a rubbery compound which
tries to eliminate the very high speed vibrations (squeal) that occur
between the pad and the caliper/piston.  Also a lot of cars are meant
to have a very thin metal plate (anti-squeal plate) clipped on to the
metal side the brake pad that sometimes gets removed inadvertantly
when being changed by inexperienced 'mechanics'.  Worst case scenario
is your brake rotors are grooved (not nice and smooth like they should
be, normally from running the pads out of material at some earlier
time) and need machining or replacing.  As always, there are certain
procedures and precautions you should follow when working on brakes,
and unless you have experience in this area it would be best left to a
qualified mechanic.