2026 GMC Sierra 1500 AT4
2026 GMC Sierra 1500 AT4 OVERVIEW 
2026 GMC Sierra 1500 AT4 For Sale
- Duramax® 3.0L Turbo-Diesel engine with 10-speed automatic transmission
- 2" factory lift with off-road suspension and Rancho® monotube shocks
- Bose Premium Sound System
- Front and Rear Park Assist
2026 GMC Sierra 1500 AT4 MODELS
-
Sierra 1500 AT4
-
Sierra 1500 AT4X
GMC Sierra 1500 AT4 For Sale
2026 GMC Sierra 1500 AT4 PERFORMANCE 
DURAMAX 3.0L TURBO-DIESEL
Power through even the toughest terrain, thanks to an available Duramax 3.0L Turbo-Diesel engine.
FACTORY-INSTALLED 2" LIFT
AT4 and AT4X full-size trucks feature a 2" suspension lift to help provide serious clearance for your off-road adventures.
HILL DESCENT CONTROL
Both Sierra AT4 and AT4X off-road trucks come with Hill Descent Control, an antilock braking feature engineered to help provide a smooth, controlled descent on steep declines.
2026 GMC Sierra 1500 AT4 APPEARANCE 
AT4 FRONT BUMPER AND GRILLE
Grille with high-gloss black header, insert bars with gloss-black accents and red recovery hooks.*
SPRAY-ON BEDLINER
AT4 and AT4X off-road trucks offer high-strength steel cargo beds featuring spray-on bedliner with GMC logo.
EXCLUSIVE AT4X WHEELS
Rugged 33" Goodyear® Wrangler Territory mud terrain tires and 18" painted aluminum wheels with dark painted pockets.
2026 GMC Sierra 1500 AT4 COMFORT 
AVAILABLE MYGMC MOBILE APP
Experience convenience, command and control in or out of your vehicle with the myGMC mobile app.*
WIRELESS CAPABILITY
Personalize your in-vehicle entertainment and more by connecting your compatible smartphone to your in-vehicle touchscreen via phone projection.
13.4" DIAGONAL PREMIUM GMC INFOTAINMENT SYSTEM*
The color touchscreen with Google built-in* compatibility and voice-activated technology for your phone provides a seamless way to customize your entertainment.
ADAPTIVE CRUISE CONTROL*
Allows you to set a cruise control speed and automatically follow a detected vehicle ahead at a driver-selected following gap.
2026 GMC Sierra 1500 AT4 SAFETY & WARRANTY 
PRO GRADE PROTECTION
Standard on every new GMC - GMC Pro Grade Protection has you truly protected with features and services including:
- 3-year / 36,000-mile Bumper-to-Bumper Limited Warranty
- 5-year / 60,000-mile Powertrain Limited Warranty
- 5-year / 60,000-mile Roadside Assistance & Courtesy Transportation
- 3-year / 36,000-mile Corrosion Protection
- 6-year / 100,000-mile Rust-Through Protection
- First maintenance visit
SIDE BLIND ZONE ALERT
Side Blind Zone Alert can provide side-mirror visual alerts when a moving vehicle is detected in a side blind zone. It can help you avoid lane change collisions.
BLIND ZONE STEERING ASSIST
Blind Zone Steering Assist can provide a brief, firm turn of the steering wheel when a potential collision is detected with a moving vehicle in the lane you’re entering.
ENHANCED AUTOMATIC EMERGENCY BRAKING
Enhanced Automatic Emergency Braking works with Forward Collision Alert to help you avoid or reduce the severity of a front-end collision with a detected vehicle you’re following, including at highway speeds. Radar and camera technology are used to automatically provide hard emergency braking or enhance the driver’s hard braking.