An NOS GM #3961556 brake pedal light switch capacitor as used with Corvette models in 1968 through 1977 production. This is also the same capacitor used with Corvette models in 1964-1967 with a mounting bracket.  Used to filter out radio noise when the brake pedal is applied. In very good unused condition with its GM picking tag dated 3-19-81. Ask any questions before bidding. Thanks