YOT 15534873-GK Chevy Blazer GMC Jimmy Jackscrew Tailgate Window Replacement Gear Jackscrew Inner Metal & Outer Plastic Gear with ring Replaces the gear in the Jackscrew (discontinued part # 15534873) This Jackscrew Gear is used on full size Blazers and Jimmy's from 1978 through 1991 (with power Tailgate Windows) Made in U.S.A.