all brakes can squeal, (disc)
especially if lightly braking, it's just pad oscillation,
ever seen a tuning fork, sing. same deal.
some do so no matter what you do.... (been there many a time)
the cure is here, if possible.
1: missing parts, ive seen many shops replace pads and leave out the pad shims... do you need a diagram of what is there.?
i have it if you need it. ask.
2: if above parts not missing put on what i call pad glue.
all stores for cars sell this magic fix. a tube of pad glue,
in fact will be marked anti-squeal magic stuff.
3: some pads like to squeal others dont (brands)
btw i own same car and it does not squeal.
suzuki went chapter 11. and their online pages, (dregs) has has no drawings of the calipers. nor lists those parts above.
i have the FSM book on this car, 2004
and page 4B1 shows these parts. (amaZing huh>)
there are 4 shims
2 one each side.of a pad.
do you need part numbers, i have the official parts catalog too.
the part names are "anti-noise springs"
i found out that suzuki sells the pad set with new shims.
so if you bought them aftermarket and they are missing
you must reuse the old shims. suzuki dont sell the shims by self.
I run RAYBESTOS.
they also have drag reducing clips..... upgrade.
Service Grade; Ceramic; Drag Reduction Clip Recommended H6046; OE Pad Material is Ceramic; Front; SGD680C
as seen here, decide what you want then buy exactly that.
all my autostores in town can get them in 1 day or less.
or buy loaded calipers.
or use the glue and pray.