Stock style calipers are perfect replacements on most GM vehicles and will fit up to 1" wide rotor. Metric inlet thread is 10mm x 1.50 pitch. Big GM inlet thread is 7/16"-20.
Product Note: THIS IS A COMPLETELY NEW ASSEMBLY, NOT A REMANUFACTURED UNIT. INLET THREAD IS M10-1.5 BLEEDER FITTING IS M10-1.5 CALIPER BORE/PISTON SIZE IS 2-3/8". CALIPER BOLTS ARE INCLUDED.