Blazer Tailgate Window Regulator Jackscrew Transmission Gear Assembly wth Cable New replacement Jackscrew Transmission Assembly with cable that connects the power window regulator of the tailgate to the power window motor Fits full size Blazer's & Jimmy's from 1978 through 1991 with a power window in the Tailgate Assembled, greased and load tested in USA Aftermarket replacement for discontinued part number 15534873 increased wall thickness of original mounting holes, Requires minor drilling/filing of 2 of original mounting holes on regulator