2026 GMC Sierra AT4
GMC Sierra Details
Automatic
V8, 6.6L
SUMMIT WHITE
4WD
Diesel
0 Miles
Jet Black w/Kalahari Accents
BT261755
1GT4UPEY0TF121318
2500
Leather
AT4
Estimated Payment
$0 / month
About This 2026 GMC Sierra
Vehicle Details
Command attention: introduce the 2026 GMC Sierra 2500 AT4 — a bold, capable, and refined heavy-duty truck built to conquer worksite demands and weekend adventures. Under the hood, a burly V8 6.6L engine delivers authoritative torque and towing confidence, paired with 4WD and an Off-Road Package that elevates ground clearance, suspension durability, and trail-ready capability. Whether hauling heavy payloads or navigating rough terrain, this GMC Sierra AT4 balances rugged performance with thoughtful comfort. Inside, modern connectivity keeps you in command: Hands Free Bluetooth, Apple CarPlay, and XM Radio provide seamless entertainment and communication on long hauls. Safety is proactive with Cross-Traffic Alert and other driver-assist features designed to support awareness in busy parking situations and tight maneuvers. The cabin combines durable materials with refined touches, offering supportive seating and intuitive controls so every drive is comfortable and efficient. Distinctive AT4 styling signals serious off-road intent—bold grille, aggressive stance, and purposeful accents set this GMC Sierra apart. Practical bed features, smart towing tech, and a confident 4WD system make it equally suited for jobsite demands and outdoor exploration. If you want muscle, capability, and modern convenience in a single package, the 2026 GMC Sierra 2500 AT4 is engineered to exceed expectations.
Equipment
This vehicle has automated speed control that adjusts to maintain a safe following distance, enhancing highway driving convenience. This GMC Sierra features a hands-free Bluetooth phone system. It's Lane Departure Warning helps keep you in your lane. Engulf yourself with the crystal clear sound of a BOSE sound system in the GMC Sierra. The GMC Sierra warns of approaching vehicles with Cross-Traffic Alert. Keep your hands warm all winter with a heated steering wheel in it . An off-road package is equipped on this GMC Sierra. The vehicle offers Android Auto for seamless smartphone integration. The leather seats in it are a must for buyers looking for comfort, durability, and style. It offers Apple CarPlay for seamless connectivity. This model is equipped with the latest generation of XM/Sirius Radio. See what's behind you with the back up camera on this 2026 GMC Sierra 2500. Never get into a cold vehicle again with the remote start feature on this model.
Packages
AT4 Preferred Package: Power Sliding Rear Window with Defogger; LED Smoked Amber Roof Marker Lamps; Universal Home Remote. AT4 Premium Plus Package: Power Sunroof; Off-Road High Clearance Step; Technology Package. Preferred Equipment Group 4SB: LED Cargo Area Lighting; Trailer Side Blind Zone Alert; SiriusXM with 360L Trial Subscription; Remote Vehicle Starter System; Safety Alert Seat; Ultrasonic Front and Rear Park Assist; Trailer Cam Provisions and Trailer Viewing Software; Electric Rear-Window Defogger; Floor-Mounted Center Console; Gloss Black Header Grille and Grille Insert Bars; Unauthorized Entry Theft-Deterrent System; Bed View Camera with Two Trailer Camera Provisions; Front Rain-Sensing Wipers; Sierra HD Pro Safety; Wireless Phone Projection; 2 USB Ports; Rear Cross Traffic Alert; 120-Volt Instrument Panel Power Outlet; 2 Charge/data USB Ports Inside Center Console; Heated Driver and Front Outboard Passenger Seats; Wireless Charging; X31 Off-Road Package; Front Premium Floor Liners with Removable Carpet Insert; Steering Wheel Audio Controls; Rear Premium Floor Liners with Removable Carpet Insert; 2 Charge-Only Rear USB Ports; OnStar Services Capable; 120-Volt Bed Mounted Power Outlet; Heated 2nd Row Outboard Seats; Power Front Passenger Windows with Express Up/down; Bose Premium 7-Speaker Sound System; 2-Speed Active Transfer Case; Deep-Tinted Glass; Spray-On Pickup Bedliner with GMC Logo; HD Surround Vision; Ventilated Driver and Front Passenger Seats; Manual Tilt-Wheel/telescoping Steering Column; Keyless Open and Start; ProGrade Trailering System; Push Button Start; Rear Wheelhouse Liners. Technology Package. Off-Road High Clearance Step. Power Sunroof. Gooseneck/5th Wheel Prep Package. 3 Years SiriusXM. LED Smoked Amber Roof Marker Lamps. **Equipment listed is based on original vehicle build and subject to change. Please confirm the accuracy of the included equipment by calling the dealer prior to purchase.**
Command attention: introduce the 2026 GMC Sierra 2500 AT4 — a bold, capable, and refined heavy-duty truck built to conquer worksite demands and weekend adventures. Under the hood, a burly V8 6.6L engine delivers authoritative torque and towing confidence, paired with 4WD and an Off-Road Package that elevates ground clearance, suspension durability, and trail-ready capability. Whether hauling heavy payloads or navigating rough terrain, this GMC Sierra AT4 balances rugged performance with thoughtful comfort. Inside, modern connectivity keeps you in command: Hands Free Bluetooth, Apple CarPlay, and XM Radio provide seamless entertainment and communication on long hauls. Safety is proactive with Cross-Traffic Alert and other driver-assist features designed to support awareness in busy parking situations and tight maneuvers. The cabin combines durable materials with refined touches, offering supportive seating and intuitive controls so every drive is comfortable and efficient. Distinctive AT4 styling signals serious off-road intent—bold grille, aggressive stance, and purposeful accents set this GMC Sierra apart. Practical bed features, smart towing tech, and a confident 4WD system make it equally suited for jobsite demands and outdoor exploration. If you want muscle, capability, and modern convenience in a single package, the 2026 GMC Sierra 2500 AT4 is engineered to exceed expectations.
Equipment
This vehicle has automated speed control that adjusts to maintain a safe following distance, enhancing highway driving convenience. This GMC Sierra features a hands-free Bluetooth phone system. It's Lane Departure Warning helps keep you in your lane. Engulf yourself with the crystal clear sound of a BOSE sound system in the GMC Sierra. The GMC Sierra warns of approaching vehicles with Cross-Traffic Alert. Keep your hands warm all winter with a heated steering wheel in it . An off-road package is equipped on this GMC Sierra. The vehicle offers Android Auto for seamless smartphone integration. The leather seats in it are a must for buyers looking for comfort, durability, and style. It offers Apple CarPlay for seamless connectivity. This model is equipped with the latest generation of XM/Sirius Radio. See what's behind you with the back up camera on this 2026 GMC Sierra 2500. Never get into a cold vehicle again with the remote start feature on this model.
Packages
AT4 Preferred Package: Power Sliding Rear Window with Defogger; LED Smoked Amber Roof Marker Lamps; Universal Home Remote. AT4 Premium Plus Package: Power Sunroof; Off-Road High Clearance Step; Technology Package. Preferred Equipment Group 4SB: LED Cargo Area Lighting; Trailer Side Blind Zone Alert; SiriusXM with 360L Trial Subscription; Remote Vehicle Starter System; Safety Alert Seat; Ultrasonic Front and Rear Park Assist; Trailer Cam Provisions and Trailer Viewing Software; Electric Rear-Window Defogger; Floor-Mounted Center Console; Gloss Black Header Grille and Grille Insert Bars; Unauthorized Entry Theft-Deterrent System; Bed View Camera with Two Trailer Camera Provisions; Front Rain-Sensing Wipers; Sierra HD Pro Safety; Wireless Phone Projection; 2 USB Ports; Rear Cross Traffic Alert; 120-Volt Instrument Panel Power Outlet; 2 Charge/data USB Ports Inside Center Console; Heated Driver and Front Outboard Passenger Seats; Wireless Charging; X31 Off-Road Package; Front Premium Floor Liners with Removable Carpet Insert; Steering Wheel Audio Controls; Rear Premium Floor Liners with Removable Carpet Insert; 2 Charge-Only Rear USB Ports; OnStar Services Capable; 120-Volt Bed Mounted Power Outlet; Heated 2nd Row Outboard Seats; Power Front Passenger Windows with Express Up/down; Bose Premium 7-Speaker Sound System; 2-Speed Active Transfer Case; Deep-Tinted Glass; Spray-On Pickup Bedliner with GMC Logo; HD Surround Vision; Ventilated Driver and Front Passenger Seats; Manual Tilt-Wheel/telescoping Steering Column; Keyless Open and Start; ProGrade Trailering System; Push Button Start; Rear Wheelhouse Liners. Technology Package. Off-Road High Clearance Step. Power Sunroof. Gooseneck/5th Wheel Prep Package. 3 Years SiriusXM. LED Smoked Amber Roof Marker Lamps. **Equipment listed is based on original vehicle build and subject to change. Please confirm the accuracy of the included equipment by calling the dealer prior to purchase.**
Features & Options
- AT4 Preferred Package: Power Sliding Rear Window with Defogger; LED Smoked Amber Roof Marker Lamps; Universal Home Remote
- AT4 Premium Plus Package: Power Sunroof; Off-Road High Clearance Step; Technology Package
- Preferred Equipment Group 4SB: LED Cargo Area Lighting; Trailer Side Blind Zone Alert; SiriusXM with 360L Trial Subscription; Remote Vehicle Starter System; Safety Alert Seat; Ultrasonic Front and Rear Park Assist; Trailer Cam Provisions and Trailer Viewing Software; Electric Rear-Window Defogger; Floor-Mounted Center Console; Gloss Black Header Grille and Grille Insert Bars; Unauthorized Entry Theft-Deterrent System; Bed View Camera with Two Trailer Camera Provisions; Front Rain-Sensing Wipers; Sierra HD Pro Safety; Wireless Phone Projection; 2 USB Ports; Rear Cross Traffic Alert; 120-Volt Instrument Panel Power Outlet; 2 Charge/data USB Ports Inside Center Console; Heated Driver and Front Outboard Passenger Seats; Wireless Charging; X31 Off-Road Package; Front Premium Floor Liners with Removable Carpet Insert; Steering Wheel Audio Controls; Rear Premium Floor Liners with Removable Carpet Insert; 2 Charge-Only Rear USB Ports; OnStar Services Capable; 120-Volt Bed Mounted Power Outlet; Heated 2nd Row Outboard Seats; Power Front Passenger Windows with Express Up/down; Bose Premium 7-Speaker Sound System; 2-Speed Active Transfer Case; Deep-Tinted Glass; Spray-On Pickup Bedliner with GMC Logo; HD Surround Vision; Ventilated Driver and Front Passenger Seats; Manual Tilt-Wheel/telescoping Steering Column; Keyless Open and Start; ProGrade Trailering System; Push Button Start; Rear Wheelhouse Liners
- Technology Package
- Off-Road High Clearance Step
- Power Sunroof
- Gooseneck/5th Wheel Prep Package
- 3 Years SiriusXM
- LED Smoked Amber Roof Marker Lamps
- Apple CarPlay/Android Auto smart device wireless mirroring
- Forward Collision Alert with Automatic Braking
- Front Pedestrian Braking
- Wi-Fi Hotspot capable mobile hotspot internet access
- HD Rear Vision Camera w/Hitch View rear mounted camera
- Adaptive cruise control
- Head-up display
- Automatic Emergency Braking predictive brake assist system
- Cruise control with steering wheel mounted controls
- Ventilated driver and front passenger seats
- Keyfob remote start
- Heated steering wheel
- Heated driver and front passenger seats
- Heated rear seats
- Leather front seat upholstery
- Primary monitor touchscreen
- Lane Departure Warning
- Rear Cross-Traffic Alert collision warning
- First-row sliding and tilting glass sunroof with express open/close activation sunshade
- Driver seat power reclining
- lumbar support
- cushion tilt
- fore/aft control and height adjustable control
- AutoTrac part and full-time 4WD
- Duramax 6.6L V-8 diesel direct injection
- intercooled turbo
- diesel
- engine with 470HP
- Front wireless smart device charging
- Google Built-In built-in virtual assistant
- Teen Driver restricted driving mode/alerts
- Keyless Open/Keyless Start with hands-free access and push button start
- Keyfob window control
- HD Surround Vision w/Hitch View aerial view camera
- Smart device remote start
- GCW Alert weight capacity alert
- Video-feed rearview mirror
- Stolen Vehicle Assistance vehicle tracker with vehicle slowdown
- Bluetooth wireless audio streaming
- Hitch Guidance vehicle to trailer hitching assist
- Gauge cluster display size: 12.30
- Front mounted camera with washer
- Right side camera
- Pickup box camera
- Left side camera
- Trailer Side Blind Zone Alert blind spot warning
- Following Distance Indicator
- Trailer light test
- Trailer light malfunction warning
- Trailer theft alarm
- Dual-zone front climate control
- Full gauge cluster screen
- Auto high-beam headlights
- Immobilizer
- Bose speakers
- OnStar vehicle integrated emergency SOS system
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