Best Tonneau Covers for 2019–2026 GMC Sierra 1500: 6 Picks for CarbonPro and Steel Beds

Part 448135 is BAK's MX4 built for the CarbonPro bed. The Amazon title says it "Only Works w/ Carbon Pro Bed," so this is not a cover to buy for a steel Sierra. Otherwise it's the same cover that leads most full-size truck lists: polymer-reinforced aluminum panels rated at 400 lb evenly distributed, BAK's patented auto-latch, EPDM perimeter seals and a fold that stacks against the cab without blocking the third brake light. The Amazon title also says it works with the MultiPro/Multi-Flex tailgate.

RealTruck lists 448135 at $1,249.99 with a 5-year warranty and an under-30-minute, one-person install. Read the install sheet before you buy. RealTruck's product notes for this part say "Installation Requires Drilling," while the page's general overview says no drilling, and BAK publishes a dedicated "19+ GMC CarbonPro Bed" instruction sheet. On the GM-Trucks MultiPro/CarbonPro thread, one owner running an MX4 says it "locks in each position, does not interfer with tailgate" and took about 30 minutes to fit. If you ever swap to a steel-bed Sierra or Silverado, you'll need the standard 448130 instead, so this cover stays with the truck.

The Sentry gives CarbonPro owners what a hard folding cover can't: the whole bed open with no panels stacked against the cab. It's a hard roll-up of interlocking aluminum slats faced with leather-grain DualShield vinyl, so it rolls like a soft cover but carries weight like a hard one. RealTruck lists a 400 lb rating. TruXedo's locking system uses a tension cable and up to six automatic latches, and the slats are sold as slash-resistant, a real step up from a vinyl roll-up.

RealTruck lists 1574301 at $1,129.99 (was $1,279.99) for the 2020–2026 Sierra 1500 short bed with CarbonPro. The Amazon listing title says 2020–2024. Neither names 2019, so if you have a 2019 CarbonPro truck, ask the seller before ordering. The warranty is 3 years on hardware and fabric, and the install is a no-drill clamp-on job TruXedo puts at 30 minutes to under an hour. It's assembled in South Dakota. For a softer, cheaper CarbonPro roll-up, TruXedo also sells the Lo Pro in a CarbonPro version (574301), which RealTruck lists at $539.99.

For a MultiPro truck, a retractable fixes the inner-gate problem. The RetraxONE MX slides forward into a compact canister, locks with a key at any point, and opens and closes without dropping the tailgate. On the GM-Trucks MultiPro/CarbonPro thread, one owner recommends it because the MultiPro main gate and inner gate still work on their own. You can pull the cover back 2 ft and use the inner gate as a load stop with the rest of the bed covered.

RealTruck lists 60488 at $1,599.99 for the 2019–2026 Sierra 1500 short bed and states it works with the CarbonPro bed and with or without the MultiPro tailgate, though not with factory side storage boxes. The trade-offs come from the materials. The panel is aluminum-reinforced polycarbonate rated at 200 lb, versus 500 lb for the aluminum RetraxPRO, and the warranty is one year. Another owner in the same thread reports leaks after a couple of years that needed new rails. For a rack-ready CarbonPro option, the RetraxPRO XR T-80488 is sold for this bed.

Most budget soft covers exclude CarbonPro, so the choice at this price is narrow. The Trifecta 2.0 92459 is one of the few that names both the CarbonPro bed and the MultiPro tailgate in its Amazon title. It's a leather-grained vinyl tri-fold on an aircraft-grade aluminum frame. Extang's patented corner tucks and triple-fin seals keep it tight, and dual-pivot hinges plus integrated buckle straps secure it when you drive with it folded.

RealTruck lists it at $449.99 (list $519.99) for the 2019–2025 Sierra 1500 short bed, with Extang's limited lifetime warranty covering the rails, clamps, bows, hardware and vinyl. Installation needs no drilling. The front clamps tighten by hand and the rear EZ-Lock clamps lock in place. Folded, it opens about two-thirds of the bed, and it comes off entirely in seconds when you need the whole bed. The Amazon title extends to 2026, but RealTruck stops at 2025, so confirm 2026 fitment with the seller. Vinyl won't stop a determined thief, so treat it as a weather cover, not a lock box.

A Denali or AT4 with a steel bed is the truck this cover is made for. The Elite LX is a one-piece ABS composite lid painted in automotive-grade paint to match the truck. UnderCover credits its "X-Effect" internal structure for a 500 lb evenly distributed rating, the highest on this page. Gas struts lift it, one hand works the integrated lock, and it comes with a carpeted headliner, a removable LED light and a cargo-retriever lanyard. Double-bulb EPDM seals run around the edge.

RealTruck lists UC1238L-50 at $2,249.99 (list $2,349.99) for the 2019–2025 Sierra 1500 short bed. Its warranty is limited lifetime on the structure and paint and one year on struts and hardware. The -50 suffix is the color. The Amazon title identifies it as GAZ (Summit White), for trucks with the MultiPro tailgate, and says it does not fit the carbon bed. Order the suffix for your own paint code. The trade-off is the lid itself: nothing taller than the bed rails fits under it, and you can't fold part of it back.

For a steel-bed Sierra where the budget stops around $600, the Gator EFX is the locking hard cover to beat. The panels are multi-layer aircraft-grade aluminum, and dual slam-latches lock them automatically. Gator claims twice as many locking points as competitors, all released with one cable from either side of the tailgate. Flush side seals and integrated drain rails move water out of the bed.

GC14020 is sold for the 2019–2026 Silverado/Sierra 1500 short bed. It isn't listed for CarbonPro, so use one of the picks above if you have the composite bed. RealTruck lists it at $599 with a 300 lb distributed rating, a 2-year warranty plus a 30-day exchange, and a no-drill, 30-minute install. It won't work with factory bed storage boxes. When it's folded, about two-thirds of the bed is open, and it comes off without tools for the times you need the rest. Gator's clamp-on design leaves the stake pockets open for tie-downs or a rack later. For a folding cover with a higher rating on a steel bed, the BAKFlip MX4 448130 is the step up.