3/8" Allen wrench should do it.
Obviously the first person to answer this is not a mechanic. The size varies from vehicle manufacturer to manufacturer. Just take the caliper to Auto Zone or a NAPA Auto parts store and get the correct size bolt.
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15 mm is the size,for caliper bolts caliper bracket bolt is t60(it is star shaped)
.The 2000 Chevrolet Monte Carlo brake caliper bolt size is 9/16. The brake caliper bolt can be purchased at most auto-parts stores
It is important to check if the brake caliper bolts are missing from your vehicle.
It is unclear if the caliper bolts are missing from the vehicle's brake system.
18mm
size of bolt on break calliber on Chevy trailblazer
Caliper retaining bolts. Torx T-40 or T-45
9 mm by 1.25
The bolts that hold the brake caliber in place.
Torque specs for brake caliper bolts 2005 mazda 6
Rear caliper to rear caliper bracket bolts, 32 ft. lbs.