Lift Kit with Shackle. Rear Shackle Lift. GMC Sierra 1500 99-07 6-Lug 2WD Classic Body. Chevy Silverado 1500 99-07 6-Lug 2WD Classic Body. This kit includes a set of 1/4" plate steel spring shackles, engineered to preserve factory ride quality and reduce driveline vibrations.
