Features and Benefits: Removes the inserts on the upper control arm alignment brackets of light duty GM trucks Features an indexed forcing bolt that pulls straight and evenly and works with off-center knock-outs New and improved design has a self-centering knock-out for full punch removal with less tear The tool fits 1989-2001 Chevrolet and GMC 1/2- 3/4- and 1-ton trucks two- or four-wheel drive. Also works on 1990-2001 all-wheel drive Chevrolet Astro vans and GMC Safari vans 1997-2002 1/2- 3/4- and 1-ton full size vans. Removes the inserts on upper control arm alignment brackets. Services:1989 - 2001 Chevrolet and GMC 1/2- 3/4- and 1-ton 2- and 4-wheel drive trucks 1990 - 2002 all-wheel drive Chevrolet Astro and GMC Safari vans. New improved design has a self-centering knock-out for full punch removal with less tear.