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Replace the factory core support mount on your GM HD truck with the Rust Buster RB7834L left-side core support mount. Fits 2011-2019 Chevy Silverado and GMC Sierra 2500HD and 3500HD single rear wheel models with all cab and bed configurations. Built to OE specifications from heavy-duty 7-gauge steel with laser-cut, bent, and welded construction. Installs in place of the OEM core support mount, requires welding, ships with a protective oil coating, and is backed by a lifetime warranty.
