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GMC AT4
AT4 is a GMC sub-brand of off-road-oriented vehicles with applications for the entire GMC lineup – except for the Savana – including the Sierra 1500, Sierra HD, Canyon, Yukon, Acadia, and Terrain nameplates.
AT4 was created as a unique persona that offers credible capability while still providing premium everyday comforts. AT4 variants distinctively combine off-road capability, innovative technology and bold design, along with GMC’s premium refinement to practically complement an authentic outdoor lifestyle. Core AT4 design includes premium rugged exterior details, featuring black chrome grille, fog light surrounds and rear appliques, as well as unique authentic aluminum interior decor and premium fabric colors.
Notably, 2019 Sierra 1500 launched the AT4 sub-brand, and replaces the All Terrain for models that offered such a trim level, which include the Acadia. Sierra 1500, and Canyon.
Models
The AT4 name is used on the following GMC models:
Current:
- Sierra 1500 (2019 – Present)
- Sierra HD (2020 – Present)
- Canyon (2021 – Present)
- Yukon (2021 – Present)
- Acadia (2021 – Present)
- Terrain (2022)
Past:
- None
Future:
- None
Sierra 1500 AT4
In 2019, the re-engineered and redesigned Sierra 1500 model introduced the AT4 moniker to the pickup truck model line. The new variant delivered a unique formula of authentic off-road capability paired with premium refinement and the bold appearance that GMC has come to be known for. The model is essentially GMC’s version of the 2019 Silverado Trailboss, but with more premium features and equipment.
Notably, the standard powertrain for the 2019 Sierra 1500 AT4 was and remains the 5.3L V8 L84 engine, though the 6.2L V8 L87 and 3.0L LM2 I6 turbo-diesel Duramax engines were also available. Other available content included a segment-first Multi-Color Head-Up Display as well as a segment-first Rear Camera Mirror and a GMC exclusive, industry-first Carbon Fiber Pickup Box.
| Model Year(s) | 2019 – Present | |
| Engine(s) | 4.8L V8, 5.3L V8, 6.2L L87 V8, 3.0L LM2 I6 Duramax | |
| Transmission(s) | 6-Speed Auto, 8-Speed Auto, 10-Speed Auto | |
| Drive Wheels | Four-Wheel-Drive | |
| Availability | U.S.A., Canada, Mexico, Middle East | |
In 2020 and 2021 the Sierra 1500 AT4 saw minor changes and updates.
- See detailed 2020 GMC Sierra 1500 changes, updates and new features here: 2020 GMC Sierra 1500 change log.
- See detailed 2021 GMC Sierra 1500 changes, updates and new features here: 2021 GMC Sierra 1500 change log.
- See complete GMC Sierra 1500 AT4 information and details.
Sierra HD AT4
The GMC Sierra HD AT4 debuted for the 2020 model year, when the fourth-generation heavy-duty pickup truck lineup entered the market. Like all AT4 models, Sierra HD AT4 features were highlighted by off-road components, and included:
- Off-road suspension, Rancho Shocks, skid plates, Eaton locking rear differential
- Eighteen-inch wheels wrapped with Michelin all-terrain tires
- 20-inch wheels available
- Traction Select System with specific Off-Road mode
- Hill Descent Control and Hill Start Assist
- Segment-exclusive 15-inch diagonal Head-Up Display with Off-Road Inclinometer
- HD Surround Vision for low-speed views of vehicle surroundings
| Model Year(s) | 2020 – Present | |
| Engine(s) | 6.6L L8T V8, 6.6L L5P V8 Duramax | |
| Transmission(s) | 6-Speed Auto, Allison 10-Speed Auto | |
| Drive Wheels | Four-Wheel-Drive | |
| Availability | U.S.A., Canada, Mexico, Middle East | |
For the 2021 and 2022 model years the Sierra HD AT4 saw minor changes and updates.
- See detailed 2021 GMC Sierra HD changes, updates and new features here: 2021 GMC Sierra HD change log.
- See detailed 2022 GMC Sierra HD changes, updates and new features here: 2022 GMC Sierra HD change log.
- (Coming soon)
- See complete GMC Sierra HD AT4 information and details.
Canyon AT4
The GMC Canyon AT4 mid-size pickup entered the market for the 2021 model year, at which time the nameplate underwent a refresh of sorts, receiving a new front fascia and other notable changes, including the AT4 trim level which replaced the All Terrain trim level.
GM Authority was the first to report that the 2021 GMC Canyon AT4 would offer a new special edition model, which has since been revealed as the new Off-Road Performance Edition, offering even more rugged capability to the already capable Canyon AT4 to provide customers with the confidence to “venture into rugged off-road environments, all while maintaining the premium comforts they have come to expect from GMC.”
One notable improvement that the Off-Road Performance Edition has over the regular Canyon AT4 is a factory-installed front suspension leveling kit that raises the front of the pickup truck by 1 inch for additional ground clearance. And because the front air dam has been removed, the kit gives you a 29.5-degree front approach angle, a 35.8 percent increase. This will help when climbing up obstacles.
| Model Year(s) | 2021 – Present | |
| Engine(s) | 3.6L LGZ V6, 2.8L LWN I4 Duramax | |
| Transmission(s) | 8-Speed Auto | |
| Drive Wheels | Four-Wheel-Drive | |
| Availability | U.S.A., Canada, Mexico, Middle East | |
- See complete details on the GMC Canyon AT4
- See complete details on the 2021 GMC Canyon AT4
- See detailed 2021 GMC Canyon changes, updates and new features here: 2021 Canyon change log.
Yukon AT4
The GMC Yukon AT4 full-size crossover entered the market for the 2021 model year, when the -generation nameplate entered the market. The Yukon AT4 is squarely focused on “rugged adventure,” and provides premium off-road inspired design cues to match its strong capability.
The first-ever Yukon AT4 features a unique front fascia that both visually carries the rugged all-terrain look and supports off-road capability. Coupled with the available four-corner Air Ride Adaptive Suspension, the AT4 can raise and offer an additional 2 inches (50 mm) of ground clearance. When at this maximum height, the Yukon AT4 offers a nearly 32-degree approach angle for added off-road capability.
Following the AT4 color scheme, the AT4 features dark accents throughout, as well as a pair of red recovery hooks.
| Model Year(s) | 2021 – Present | |
| Engine(s) | 5.3L L84 V8 | |
| Transmission(s) | 10-Speed Auto | |
| Drive Wheels | Four-Wheel-Drive | |
| Availability | U.S.A., Canada, Mexico, Middle East | |
- See complete details on the GMC Yukon AT4
- See complete details on the 2021 GMC Yukon AT4
- See complete details on the 2021 GMC Yukon
Acadia AT4
The GMC Acadia AT4 crossover entered the market for the 2020 model year, featuring bold styling cues, including a black chrome-accented grille, add a rugged, off-road-inspired design to the Acadia range. The tried-and-true 3.6L LGX V6 engine – producing 310 horsepower and 271 pound-feet of torque – is paired with a twin clutch AWD system, both of which are standard on the Acadia AT4. Unique 17-inch wheels and all-terrain tires are also standard, with 20-inch wheels available.
| Model Year(s) | 2020 – Present | |
| Engine(s) | 3.6L LGX V6 | |
| Transmission(s) | 9-Speed Auto | |
| Drive Wheels | All-Wheel-Drive | |
| Availability | U.S.A., Canada, Mexico, Middle East | |
- See complete details on the GMC Acadia AT4
- See complete details on the 2021 GMC Acadia
- See detailed 2021 GMC Acadia changes, updates and new features here: 2021 Acadia change log.
Terrain AT4
The GMC Terrain AT4 crossover entered the market for the 2022 model year, making it the newest AT4 model and completing the sub-brand’s expansion across the entire GMC lineup. Set to arrive in the late summer of 2021, the off-road-oriented model will feature a rugged exterior, confident capability and advanced technology.
As GM Authority reported, the Terrain AT4 will be offered exclusively with all-wheel-drive, just like its larger sibling, the Acadia AT4. Other features include a unique front fascia, gloss black-painted wheels wrapped in off-road-capable tires, a steel protective front skid plate, and AT4 exterior badging.
| Model Year(s) | 2022 – Present | |
| Engine(s) | 1.5L LYX I4 Turbo | |
| Transmission(s) | 9-Speed Auto | |
| Drive Wheels | All-Wheel-Drive | |
| Availability | U.S.A., Canada, Mexico | |
- See complete details on the GMC Terrain AT4
- See complete details on the 2022 GMC Terrain
- See detailed 2021 GMC Acadia changes, updates and new features here: 2022 Terrain change log.
AT4 Color Scheme
While the exterior color options for AT4 branded models are typically restricted and do not include every hue available from a model’s given palette, the interior color combination appears to be limited to just one: Jet Black with Kalahari accenting. Red recovery hooks are also common across all AT4 models with exception to the two crossover models, i.e. the Acadia and Terrain.
Discussion
Discuss GMC AT4 models in our GMC forum.
AT4 News
-
Here’s The Refreshed 2025 GMC Yukon AT4 Before You’re Supposed To See It
A camouflage-free view of the off-road trim.
GMC AT4 Sub-Brand Celebrates 5th Anniversary
Off-roader trim level launched for the 2019 model year.
