Preproduction model shown throughout with optional features. Actual production model may vary.
2025
SIERRA HEAVY DUTY
2500 & 3500 HEAVY DUTY PICKUP TRUCKS
KEY FEATURES
MAX
TRAILERING CAPACITY 8,392 KG§
STANDARD
ENHANCED 6.6L V8 ENGINE WITH 10-SPEED ALLISON
AUTOMATIC TRANSMISSION
3 YEARS ONSTAR CONNECT AND PROTECT PLAN§ INCLUDED
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
PRO
STARTING AT
KEY FEATURES:
- Standard 6.6L V8 Engine with Allison® 10-Speed Automatic Transmission
- Standard LED Headlamps and Daytime Running Lamps
- Standard Trailering Package and Trailering Mirrors
§
- Heavy-Duty Cargo Bed Volume
- Standard Wireless Apple CarPlay®
§ and Wireless Android AutoTM§ Compatibility
- Available MultiProTM Tailgate
- Standard Cruise Control
- 3 Years OnStar Connect and Protect Plan
§
SLE
STARTING AT
KEY FEATURES:
- Standard 6.6L V8 Engine with Allison® 10-Speed Automatic Transmission
- Standard 13.4" Diagonal Center Touch-Screen and 12.3" Diagonal Driver Information Center
- Standard Wireless Apple CarPlay®
§ and Wireless Android AutoTM§ Compatibility
- Available MultiProTM Tailgate
- Animated Lighting for The Headlamps, Taillamps, and Turn Signals
- Standard 230-volt bed -mounted power outlet
- Front and Rear Park Assist is added in Driver Safety Package
- Power Sunroof
- Universal Home Remote
- 3 Years OnStar Connect and Protect Plan
§
DENALI
STARTING AT
KEY FEATURES:
- Standard 6.6L V8 Engine with Allison® 10-Speed Automatic Transmission
- 13.4" Diagonal Center Touch-Screen, 12.3" Diagonal Digital Driver Information Center and Available Multicolor 15" Diagonal Head-Up Display
- Denali-Exclusive Authentic Open-Pore Wood, Patterned Aluminum Trim and Forge Perforated Leather Seating Surfaces
- Standard Adaptive Cruise Control
- Spray-on Bedliner will have GMC Logo on back wall
- Power Sunroof
- Universal Home Remote
- 3 Years OnStar Connect and Protect Plan
§
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 TRAILERING§
The New 2025 Sierra Heavy Duty offers the most trailering-assistance technologies. This available advanced tech allows you to trailer with enhanced confidence and improved views.
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 SEATS
Sierra Heavy Duty offers premium front seats with perforated leather appointments.
ADVANCED TECHNOLOGY
Enjoy 3 years of the OnStar Connect and Protect Plan
Preproduction model shown throughout with optional features. Actual production model may vary.
SAFETY
SIERRA HD PRO SAFETY§
- 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
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.
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.