This Sentry CT fits the redesigned 2019-2026 Chevrolet Silverado 1500 and GMC Sierra 1500 with the 5'10" box (69.9"), the short bed GM calls 5'8". It works with or without the MultiPro or Multi-Flex tailgate, but not with the Sierra's CarbonPro bed or the factory side storage boxes. Under the RTxTechWeave canvas is a row of interlocking aluminum slats, which makes it a hard roll-up you can still roll right up to the cab. Have a tailgate with a key lock? Then locking the tailgate locks the cover. TruXedo rates the closed cover at 400 lb, evenly distributed. It clamps on; no drilling is needed on most trucks. TruXedo backs it with a 5-year warranty.