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Preproduction model shown throughout with optional features. Actual production model may vary.
Due to global Semi-Conductor supply shortages and software issues, GM vehicles may not have some standard features and options. Please check with your local GMC dealer to confirm the vehicle’s specifications prior to purchase. Vehicles not equipped with Automatic Stop/Start will be less fuel efficient.
EXPLORE SIERRA HEAVY DUTY TRIMS
THE POWER TO PULL YOUR WORLD
Sierra Heavy Duty is the real deal—with the strength and pulling power to haul heavy loads and the most available trailering-assistance technologies
6.6L V8 10-SPEED AUTOMATIC TRANSMISSION OFFERS:
- 629 Nm of Torque and 401 hp
- Up to 25% Increase in Low-End Torque Over the Previous Model Year
- Increased Power and Torque Over the Entire Operating Speed Range
- Enhanced Exhaust Brake Performance for Improved Control When Towing
- Improved Engine Braking with a More Powerful Turbo Vane Actuator and Uprated Valve Springs
SIERRA HEAVY-DUTY ADVANCED TRAILERING3
The New 2026 Sierra Heavy Duty offers the most trailering-assistance technologies. This available advanced tech allows you to trailer with enhanced confidence and improved views.
PROGRADETM TRAILERING TECH
This advanced suite of available intelligent technologies helps streamline the hitching and towing process with integrated tools that enhance your sense of safety, confidence and visibility.
- Trailer Tire Pressure3 and Temperature Monitoring
- Trailer Side Blind Zone Alert3
- Trailer Sway Control
- Trailer Length Indicator3
- Trailer Brake Controller
- Trailer Angle Indicator with Jack-Knife Alert3
- Gross Combined Weight (GCW) Alert3
- Trailer Light Test
- Trailer Theft Detection
- Maintenance Reminders
- Auto Electric Parking Brake
- Create and Customize Trailer Profiles
- Tow/Haul Mode Reminder
- Predeparture Checklists
- Tow/Haul Mode
- Trailering Mirrors
UP TO 14 AVAILABLE CAMERA VIEWS3
INCLUDING TRANSPARENT TRAILER VIEW
More views help to provide a more confident trailering experience, such as transparent trailer view, which is now enhanced to enable compatibility with most gooseneck and fifth-wheel trailers.
- Enhanced Transparent Trailer View3
- Hitch View
- Cargo Bed View (With Zoom View and Hitch Guidelines)
- Front Camera View
- Rear Camera View
- Surround View
- Front Top-Down View
- Rear Top-Down View
- Front Side View
- Rear Side View3 (With Trailer Biasing)
- Rear Trailer View3 (With Guidelines and Trailer Angle Indicator)
- Inside Trailer View3
- Picture-In-Picture View3
- Rear Camera Mirror3
POWERFULY BOLD EXTERIOR
Sierra Heavy Duty’s impressive exterior stands out proudly everywhere you go.
NEW LED PROJECTOR HEADLAMPS AND SIGNATURE LIGHTING
New LED projector headlamps with striking animated sequences helps enhance Sierra Heavy Duty’s bold exterior design.
NEW FRONT BUMPER, FASCIA AND AVAILABLE REDESIGNED DENALI CHROME GRILLE
Stand out everywhere you go with Sierra HD Denali’s bold new front end.
AVAILABLE SIX-FUNCTION MULTIPRO TAILGATE
The powerfully innovative available MultiPro™ Tailgate combines six convenient functions that help improve loading, unloading and accessing the cargo bed to make light work of almost any job.
PREMIUM INTERIORS
Sierra Heavy Duty’s interiors are rugged and refined with premium materials to make every trip first-class
AVAILABLE 16-WAY POWER FRONT SEATS WITH MASSAGING FEATURE
Experience serious comfort everywhere you go in Sierra Heavy Duty’s luxurious seating.
AVAILABLE 10-WAY POWER-ADJUSTABLE FRONT HEATED AND VENTILATED BUCKET SEATS10
Sierra Heavy Duty offers premium front seats with perforated leather appointments.
ADVANCED TECHNOLOGY
Enjoy 3 years of the OnStar Connect Plan18. Experience seamless connectivity that makes every drive better over time with Google Built-In, 4G LTE Wi-Fi, Vehicle Mobile App and more.
Preproduction model shown throughout with optional features. Actual production model may vary.
12.3" DIAGONAL DIGITAL DRIVER INFORMATION CENTER
Sierra Heavy Duty features an 12.3" diagonal digital Driver Information Center. Control and customize important vehicle, driving and infotainment content with high-resolution clarity.
AVAILABLE 13.4" DIAG. CENTER TOUCH-SCREEN
A 13.4” diagonal tablet-style touch-screen— is the customizable, high-tech center-piece of the cabin.
Configure to your preference—including a “split-screen” view—to get a high-resolution view of such information as:
TRAVEL IN SIERRA HEAVY DUTY STYLE
The spacious, comfortable cabin offers innovative driver-centric technologies such as the Bose14 Premium Sound System with Richbass woofer
SAFETY
SIERRA HD PRO SAFETY3
- Every Sierra Heavy Duty includes active safety and driver-assistance technologies that help while driving and trailering. Sierra HD Pro Safety includes:
- Forward Collision Alert
- Following Distance Indicator
- Front Pedestrian Braking
- IntelliBeam
- Lane Departure Warning
- Buckle to Drive
- Automatic Emergency Braking
SPECS
GALLERY
Due to global Semi-Conductor supply shortages and software issues, GM vehicles may not have some standard features and options. Please check with your local GMC dealer to confirm the vehicle’s specifications prior to purchase. Vehicles not equipped with Automatic Stop/Start will be less fuel efficient.
