GM TRUCKS UPPER CONTROL ARM KNOCK-OUT TOOL. Used. No Returns • Removes the inserts on upper control arm alignment brackets to adjust Camber/Caster for front end alignment adjustments. • Services 1989-2001 Chevrolet and GMC 1/2-, 3/4-, and 1-ton 2- and 4-wheel drive trucks, and 1990-2002 all-wheel drive Chevrolet Astro and GMC Safari vans. • Improved design has a self-centering knock-out for full punch removal with less tear.
