Back-up, Cornering and Turn Signal Single Contact Socket

2-Wire GM Single Contact Back-Up, Cornering and Turn Light Socket. 1972 and Newer. Replaces GM #12003878, #8904251 and #8904257. Uses Bulb #63, #67, #81, #87, #89, #93, #97, #203, #1003, #1073, #1129, #1133, #1141 and #1156.