GMC Sierra 3500HD
GMC SIERRA 3500HD
2026 ModelLeft Hand Drive / Converted Right Hand Drive·Heavy-Duty Truck·5 Variants
Last updated
GMC Sierra 3500HD
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The 2026 GMC Sierra 3500 HD represents the ultimate in GMC's heavy-duty truck lineup, offering exceptional towing capability up to 36,000 pounds. Available in six distinct trims with multiple cab configurations and single/dual rear wheel options, this truck is designed for the most demanding commercial and heavy-duty applications.
Variant Overview
Available Trims
- Pro
- SLE
- SLT
- AT4
- Denali
- Denali Ultimate
Note: AT4X trim is not available on Sierra 3500 HD models
Core Specifications by Variant
Pro
Fuel Type: Gasoline or Diesel
Seating: 3, 6, or 8-seater (varies by cab configuration)
Transmission: 10-speed Allison automatic
Power: 401 HP (299 kW) / 470 HP (350 kW) diesel
Torque: 464 lb-ft (629 Nm) / 975 lb-ft (1322 Nm) diesel
Engine: 6.6L V8 / 6.6L Duramax Turbo-Diesel V8
Steering: LHD
Body Type: Pickup Truck
SLE
Fuel Type: Gasoline or Diesel
Seating: 3, 6, or 8-seater (varies by cab configuration)
Transmission: 10-speed Allison automatic
Power: 401 HP (299 kW) / 470 HP (350 kW) diesel
Torque: 464 lb-ft (629 Nm) / 975 lb-ft (1322 Nm) diesel
Engine: 6.6L V8 / 6.6L Duramax Turbo-Diesel V8
Steering: LHD
Body Type: Pickup Truck
SLT
Fuel Type: Gasoline or Diesel
Seating: 6-seater (Crew Cab only)
Transmission: 10-speed Allison automatic
Power: 401 HP (299 kW) / 470 HP (350 kW) diesel
Torque: 464 lb-ft (629 Nm) / 975 lb-ft (1322 Nm) diesel
Engine: 6.6L V8 / 6.6L Duramax Turbo-Diesel V8
Steering: LHD
Body Type: Pickup Truck
AT4
Fuel Type: Gasoline or Diesel
Seating: 6-seater (Crew Cab only)
Transmission: 10-speed Allison automatic
Power: 401 HP (299 kW) / 470 HP (350 kW) diesel
Torque: 464 lb-ft (629 Nm) / 975 lb-ft (1322 Nm) diesel
Engine: 6.6L V8 / 6.6L Duramax Turbo-Diesel V8
Steering: LHD
Body Type: Pickup Truck
Denali
Fuel Type: Gasoline or Diesel
Seating: 6-seater (Crew Cab only)
Transmission: 10-speed Allison automatic
Power: 401 HP (299 kW) / 470 HP (350 kW) diesel
Torque: 464 lb-ft (629 Nm) / 975 lb-ft (1322 Nm) diesel
Engine: 6.6L V8 / 6.6L Duramax Turbo-Diesel V8
Steering: LHD
Body Type: Pickup Truck
Denali Ultimate
Fuel Type: Gasoline or Diesel
Seating: 6-seater (Crew Cab only)
Transmission: 10-speed Allison automatic
Power: 401 HP (299 kW) / 470 HP (350 kW) diesel
Torque: 464 lb-ft (629 Nm) / 975 lb-ft (1322 Nm) diesel
Engine: 6.6L V8 / 6.6L Duramax Turbo-Diesel V8
Steering: LHD
Body Type: Pickup Truck
Available Colors by Variant
Universal Colors (All Variants)
- Summit White
- Onyx Black
- Sterling Metallic
- Volcanic Red Tintcoat
New for 2026
- Coastal Dune (replacing Thunderstorm Gray)
- Glacier White Tricoat (replacing White Frost Tricoat)
Color Distribution by Trim
Pro, SLE, SLT, AT4
- All universal colors plus Coastal Dune
Denali and Denali Ultimate
- All universal colors plus Glacier White Tricoat (premium option)
Cab and Wheel Configurations
Regular Cab (Pro and SLE only)
- Seating: 3-seater
- Bed: 8-foot long bed only
- Wheels: Single Rear Wheel (SRW) or Dual Rear Wheel (DRW)
- Drivetrain: RWD or 4WD
Double Cab (Pro and SLE only)
- Seating: 6-seater
- Bed: 8-foot long bed only
- Wheels: Single Rear Wheel (SRW) or Dual Rear Wheel (DRW)
- Drivetrain: RWD or 4WD (2026 eliminates RWD on SLE)
Crew Cab (All trims)
- Seating: 6-seater
- Bed: 6'9" standard bed or 8-foot long bed
- Wheels: Single Rear Wheel (SRW) or Dual Rear Wheel (DRW)
- Drivetrain: RWD or 4WD (2026 eliminates RWD on SLE and SLT)
Chassis Cab (Pro and SLE only)
- Configuration: Regular or Crew Cab
- Wheels: Dual Rear Wheel (DRW) only
- Purpose: Commercial upfitting applications
Additional Specifications
Drivetrain Changes for 2026
- Pro: RWD or 4WD available across all configurations
- SLE: 4WD only (RWD eliminated except Chassis Cab)
- SLT: 4WD only (RWD eliminated)
- AT4: 4WD standard
- Denali/Denali Ultimate: 4WD standard
Maximum Towing Capacity by Configuration
- Regular Cab DRW: Up to 36,000 lbs (gooseneck/fifth-wheel), 32,000 lbs (fifth-wheel)
- Double Cab DRW: Up to 31,580 lbs (gooseneck/fifth-wheel)
- Crew Cab DRW: Up to 30,800 lbs (gooseneck/fifth-wheel)
- Crew Cab SRW: Up to 21,300 lbs (conventional)
Payload Capacity
- Regular Cab DRW: Up to 7,290 lbs
- Double Cab DRW: Up to 6,820 lbs
- Crew Cab DRW: Up to 6,378 lbs (varies by trim)
- Crew Cab SRW: Up to 4,127 lbs
Dimensions by Configuration
Regular Cab
- Overall Length: 236.3"
- Wheelbase: 141.5"
- Ground Clearance: 11.2" (SRW), 10.5" (DRW)
Double Cab
- Overall Length: 257.2"
- Wheelbase: 162.5"
- Ground Clearance: 11.2" (SRW), 10.4" (DRW)
Crew Cab
- Overall Length: 250.8"-266.8"
- Wheelbase: 159.0"-172.0"
- Ground Clearance: 11.1"-11.2" (SRW), 10.4" (DRW)
Fuel Tank Capacity
- Standard: 36 gallons
- Optional: 48 gallons (available on most configurations)
Key Features by Variant
Pro Standard Features
Capability
- Trailering Package with integrated Trailer Brake Controller
- Best-in-class HD cargo bed volume
- CornerStep rear bumper with built-in steps
Technology
- 7" diagonal color touchscreen infotainment system
- Wireless Apple CarPlay and Android Auto compatibility
- Bluetooth streaming audio
Safety
- Automatic Emergency Braking
- Forward Collision Alert
- Following Distance Indicator
Available Options
- Duramax 6.6L Turbo-Diesel V8 engine
- Adaptive Cruise Control with trailering capability
SLE Additional Features
Technology Upgrades
- 13.4" diagonal Premium GMC Infotainment System with Google built-in
- 12.3" diagonal digital Driver Information Center
- Traction Select System with Tow/Haul mode
Exterior
- 17" machined aluminum wheels
Available Options
- Up to 13 camera views including Transparent Trailer View
- MultiPro Tailgate with Audio System by Kicker
- X31 off-road package with twin-tube Rancho shocks and skid plates
SLT Premium Features
Comfort
- 10-way power driver and front outboard passenger heated seats with lumbar support
- Heated steering wheel
- ProGrade Trailering System with In-Vehicle Trailering App
Exterior
- 18" machined aluminum wheels with dark grey metallic accents
- MultiPro Tailgate standard
Available Options
- 10-way power-adjustable heated and ventilated bucket seats with perforated leather appointments
- MultiPro Tailgate Audio System by Kicker
AT4 Off-Road Features
Off-Road Capability
- Standard 4WD with two-speed transfer case
- Off-Road Suspension Package with twin-tube Rancho shocks
- Skid plates for enhanced underbody protection
- Single Rear Wheel configuration only (no DRW available)
Interior
- Jet Black interior with Kalahari accents
- Heated and ventilated perforated leather front seats
Technology
- Up to 14 camera views with HD Surround Vision
- Standard Adaptive Cruise Control with trailering
Available Options
- 15" diagonal Head-Up Display with off-road inclinometer
- 20" gloss-black aluminum wheels with available BFGoodrich off-road tires
Denali Luxury Features
Premium Materials
- Signature Denali grille with chrome accents
- 20" Ultra-Bright machined aluminum wheels with bright chrome inserts
- Denali-exclusive authentic wood and patterned aluminum trim
Interior
- Forge perforated leather seating surfaces
- 12-way heated and ventilated power front seats
Technology
- 12-speaker Bose Premium Series sound system
- Enhanced infotainment system features
Available Configurations
- Available in both Single and Dual Rear Wheel configurations
Denali Ultimate Top-Tier Features
Advanced Luxury
- Signature Vader Chrome grille with high gloss black surround
- Exclusive 20" Ultra-Bright machined aluminum wheels with gloss-black inserts
- Standard Duramax 6.6L Turbo-Diesel V8 engine
Premium Interior
- Alpine Umber full-grain leather seating surfaces
- Authentic Paldao wood trim with laser-etched patterns
- Best-in-class 16-way power front seats with massage feature
Technology
- 12-speaker Bose Premium Series with Centerpoint surround sound
- Illuminated power assist steps
- MultiPro Tailgate Audio System by Kicker standard
Available Options
- Auxiliary trailer camera provisions
- Power sunroof
- Rear Camera Mirror
Interior Color Options by Variant
Pro
- Jet Black cloth seat trim
SLE
- Jet Black cloth seat trim
- Dark Walnut/Slate (available option)
SLT
- Jet Black leather-appointed seating surfaces
AT4
- Jet Black with Kalahari accents, perforated leather seating surfaces
Denali
- Jet Black, Forge perforated leather seating surfaces
Denali Ultimate
- Alpine Umber full-grain leather seating surfaces
Safety & Technology Features
Standard Safety Features (Varies by Trim)
- Automatic Emergency Braking
- Forward Collision Alert
- Lane Keep Assist with Lane Departure Warning
- Following Distance Indicator
- Front Pedestrian Braking
- Tire Pressure Monitoring System with Tire Fill Alert
- Teen Driver technology
Available Advanced Safety
- Enhanced Automatic Emergency Braking
- Blind Zone Alert
- Rear Cross Traffic Alert
- HD Surround Vision with up to 14 camera views
- Adaptive Cruise Control with trailering capability
- Front and Rear Park Assist
- Safety Alert Seat
Infotainment Systems
- Pro: 7" diagonal touchscreen
- SLE and Above: 13.4" diagonal Premium GMC Infotainment System with Google built-in
- Wireless Apple CarPlay and Android Auto
- Wi-Fi hotspot capability
- SiriusXM with 360L
Audio Systems
- Standard: 6-speaker system
- Available: Bose Premium sound system (7-speaker)
- Denali/Denali Ultimate: 12-speaker Bose Premium Series
Advanced Trailering Technology
ProGrade Trailering System (SLT and above)
- In-Vehicle Trailering App
- Trailer Light Test
- Trailer Tire Pressure Monitoring
- Hitch Guidance with Hitch View
Camera Systems
- Up to 14 camera views available
- Transparent Trailer View
- Bed View Camera
- 360-degree HD Surround Vision
The 2026 GMC Sierra 3500 HD continues to lead the heavy-duty segment with exceptional capability, advanced technology, and comprehensive trim offerings. Each variant is designed to meet specific needs, from the work-focused Pro to the luxury-appointed Denali Ultimate, all while maintaining the exceptional towing and payload capacity that defines the 3500 HD series.

Variant Configuration
Identical units of this variant in the shipment.
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