2019 GMC Canyon
Bed Covers
The year AT4 was born. Lock down your off-road rig with a tonneau cover engineered for trails, highways, and everything between.
The Birth of AT4: A Landmark Year for the Canyon
The 2019 GMC Canyon introduced the most significant trim addition since the Denali arrived just one year earlier. The AT4 trim replaced the All Terrain X package with a fully integrated off-road focused model that became an instant icon. Equipped with an off-road tuned suspension, front and rear locking differentials, heavy-duty skid plates, and factory-fitted Goodyear Wrangler DuraTrac tires, the AT4 transformed the Canyon into a trail-ready machine straight from the dealership floor.
What made the 2019 AT4 particularly compelling was the availability of the 2.8L Duramax diesel engine option. Pairing 369 lb-ft of low-end torque with the AT4's off-road hardware created a midsize truck that could crawl over rocks, ford streams, and then cruise the highway with diesel efficiency. The Denali continued alongside the AT4, giving buyers a clear choice between luxury refinement and off-road aggression.
For owners of both trims, a tonneau cover is a natural upgrade. The AT4 benefits from a rugged cover that handles trail abuse, while the Denali deserves a premium finish that matches its upscale appointments. Both share identical bed dimensions, so the only choice is style and material, not fitment. Explore our dedicated AT4 bed covers guide for trim-specific recommendations.
2019 Canyon Bed Measurements
The 2019 Canyon maintains the same bed configurations that have defined the second-generation platform since its debut. Proper measurement ensures your tonneau cover arrives ready to install.
5'2" Short Bed (Crew Cab)
The 61.7-inch short bed pairs with the Crew Cab body style. This is the dominant choice for AT4 buyers who want maximum passenger room plus off-road capability. The Crew Cab AT4 with the short bed is the most popular 2019 Canyon configuration by a wide margin.
6'2" Long Bed (Extended Cab)
The 74.0-inch long bed comes with the Extended Cab. While less common on the AT4, this configuration is available on SLE and SLT trims for owners who prioritize maximum cargo length for hauling materials, lumber, or recreational gear.
Between-wheel-well width remains at 44.9 inches and bed depth at 20.9 inches. These dimensions are universal across the AT4, Denali, SLT, and SLE trims. The AT4's additional underbody equipment such as skid plates does not alter bed dimensions or affect tonneau cover fitment in any way.
Tonneau Cover Styles for the 2019 Canyon AT4 and Denali
With two premium trims offering vastly different personalities, the 2019 Canyon demands tonneau covers that match. Here is how each cover type aligns with the AT4's ruggedness and the Denali's refinement.
Hard Tri-Fold Covers for the AT4
Hard tri-fold covers are the go-to choice for AT4 owners. Three rigid aluminum panels withstand the vibration, dust, and debris that come with off-road driving. When sealed, the panels lock into position with heavy-duty latches that prevent rattling on rough terrain. Matte black and textured finishes complement the AT4's dark exterior accents and aggressive grille. Many hard tri-folds support 300 to 400 pounds of on-top weight, letting you strap gear on the surface for base camp setups.
Retractable Covers for the Denali
Retractable tonneau covers match the Denali's premium positioning with sleek low-profile operation and refined materials. Polished or powder-coated aluminum slats slide open on sealed tracks, retracting into a compact canister near the cab. The flush-mount design preserves the Denali's clean body lines, and the key-lock mechanism provides vault-like security. Premium retractable covers support up to 500 pounds when closed, making them both beautiful and functional.
Soft Roll-Up Covers
The budget-friendly option that still delivers reliable weather protection and quick bed access. Marine-grade vinyl resists UV damage and tears, while aluminum crossbars provide structure. Rolling toward the cab takes seconds, and the low profile looks clean on SLE and SLT trims. Starting at around $250, soft roll-ups are ideal for owners who want functional coverage without investing in premium materials.
Toolbox-Compatible Covers
Many 2019 Canyon AT4 owners add a crossover toolbox near the cab for storing recovery gear, tow straps, and off-road tools. Several tonneau cover manufacturers produce toolbox-compatible versions that work around a standard crossover box, providing weather protection for the remaining bed area while leaving the toolbox accessible. These modified covers come in both soft roll-up and hard tri-fold designs.
AT4 Off-Road Features and Cover Compatibility
The 2019 AT4 brought serious off-road hardware to the Canyon platform. Understanding how these features interact with tonneau covers helps you make the right purchase decision.
Skid Plate Clearance
The AT4's underbody skid plates protect the transfer case and fuel tank from trail impacts. These components are mounted beneath the truck frame and have zero interference with bed-mounted tonneau covers. Your cover's rail clamps attach to the top of the bed rails, well above and separate from any underbody protection equipment.
Goodyear DuraTrac Tires
The factory Goodyear Wrangler DuraTrac tires create more road noise and vibration than standard highway tires. Choose a tonneau cover with reinforced latching mechanisms and thick rubber seals that absorb vibration without loosening. Hard covers with positive-lock latches outperform friction-fit designs in this environment.
Duramax Diesel AT4
The 2.8L Duramax diesel paired with the AT4 package creates one of the most capable off-road midsize trucks available. Diesel AT4 owners benefit from a tonneau cover's aerodynamic improvement at highway speeds between trail outings, extending the already impressive range of the diesel powertrain on long drives to remote destinations.
Locking Differential Synergy
The AT4's front and rear locking differentials signal that this truck is built for serious off-roading. Owners who regularly engage the lockers on technical terrain need a cover that handles extreme approach and departure angles. Hard covers with positive-retention hinges prevent panels from swinging open during steep descents or aggressive trail maneuvers.
How to Install a Tonneau Cover on the 2019 Canyon AT4
Installation on the 2019 Canyon follows the same no-drill process as other second-generation models. AT4 owners should pay attention to a few additional considerations.
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1
Clean trail debris from the bed rails before beginning. AT4 owners often accumulate mud, sand, and grit in the rail channels that can prevent proper clamp seating. A thorough cleaning ensures a secure, rattle-free fit.
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2
Position the mounting rails along both bed rails with clamps at the manufacturer-specified spacing. Hand-tighten initially to allow for lateral adjustment before final torquing.
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3
Set the cover and verify alignment. The cover should sit flush against the cab bulkhead and make even contact with the tailgate seal across its full width. Adjust rail positions if any gaps appear.
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4
Torque all clamps and connect drainage. For AT4 owners who go off-road, tighten clamps an additional quarter-turn beyond standard recommendation to prevent vibration loosening. Connect drain tubes to the factory bed drain holes.
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5
Perform an extended shake test. Beyond the standard open-close check, grip the cover and shake it laterally and vertically to simulate trail conditions. If any clamp shifts or rattles appear, retighten immediately.
Plan for 30 to 50 minutes of installation time. AT4 owners should re-check clamp tightness after their first off-road outing to confirm nothing has loosened under real-world trail conditions.
Benefits of a Tonneau Cover on the 2019 Canyon
Trail-ready cargo security is paramount for AT4 owners. Off-road driving involves bumps, drops, and unexpected impacts that can launch unsecured items out of an open bed. A locked tonneau cover keeps recovery straps, tools, and camping gear secure no matter how rough the terrain gets.
Dust and debris protection addresses one of the biggest frustrations of off-road trucking. Without a cover, fine trail dust settles into every crevice of the bed and coats stored gear. A properly sealed tonneau cover with quality EPDM gaskets blocks dust infiltration, keeping your bed interior clean even after hours on dusty fire roads.
Highway fuel efficiency between adventures saves money on long drives to trailheads and remote destinations. The sealed bed surface reduces aerodynamic drag, with most owners reporting 1 to 3 MPG improvement at highway speeds. Diesel AT4 owners already benefit from excellent fuel economy, and a tonneau cover extends that advantage further.
Elevated resale value benefits both AT4 and Denali owners. The 2019 Canyon holds strong residual value as the first AT4 model year, and a well-maintained tonneau cover signals to future buyers that the truck has been properly cared for. Protected beds show less wear, fewer scratches, and better overall condition at trade-in time.
Frequently Asked Questions
The AT4 is an all-new off-road focused trim that replaces the All Terrain X package from 2017. It features an off-road tuned suspension with 2-inch front lift, front and rear locking differentials, heavy-duty skid plates protecting critical underbody components, factory-fitted Goodyear Wrangler DuraTrac all-terrain tires, and dark-finish exterior styling with unique AT4 badging. Learn more about covers for this trim on our AT4 bed covers page.
Yes. The 2019 Canyon AT4 offers the 2.8L Duramax diesel as an engine option alongside the standard 3.6L V6. The diesel AT4 combines serious off-road capability with 369 lb-ft of torque at low RPM, making it ideal for rock crawling and steep hill climbing. Tonneau cover fitment is identical regardless of engine choice.
No. Both the AT4 and Denali share identical bed dimensions—the same 5'2" short bed or 6'2" long bed. The same tonneau cover fits both trims without modification. The difference is aesthetic preference: AT4 owners tend to favor matte black and textured finishes that match the dark exterior styling, while Denali owners prefer chrome accents or color-matched painted covers that complement the premium chrome exterior.
The AT4's skid plates are mounted underneath the truck frame, protecting the transfer case and fuel tank from ground impacts. They have absolutely no interference with tonneau cover installation, which occurs at the top of the bed rails. All bed-mounted covers use the same rail clamp system regardless of what underbody protection is equipped on your Canyon.
The 2019 Canyon AT4 is available with both bed sizes: the 5-foot 2-inch short bed (61.7 inches, Crew Cab) and the 6-foot 2-inch long bed (74.0 inches, Extended Cab). The Crew Cab short bed is by far the most popular AT4 configuration. Always verify your specific bed length on the driver-side door jamb sticker before ordering a tonneau cover.
Gear Up Your 2019 Canyon
Browse tonneau covers built for the 2019 GMC Canyon AT4, Denali, SLT, and SLE trims.
Also explore: 2018 Canyon · 2020 Canyon