Located at Baker Buick GMC of Lowell.
The 2026 GMC Sierra 3500HD AT4 represents serious capability paired with refined comfort. This white heavy-duty truck arrives with a 6.6L V8 engine and 10-speed automatic transmission, delivering the power and control you need for demanding work and towing applications. Four-wheel drive standard equipment ensures confident handling across varied terrain and weather conditions.
- AT4 Preferred Package
- Black Badging Package
- Gooseneck/5th Wheel Prep Package
- Preferred Equipment Group 4SB
- Snow Plow Prep/Camper Package
- Technology Package
- X31 Off-Road Package
- Bose Premium 7-Speaker Sound System
- SiriusXM with 360L Trial Subscription
- Off-Road Suspension with 2-Speed Active Transfer Case
- HD Surround Vision with Bed View Camera
- Wireless Phone Projection and Charging
- Heated and Ventilated Front Seats with Power Adjusters
The truck bed is equipped with a spray-on bedliner bearing the GMC logo and includes a 120-volt bed-mounted power outlet for jobsite versatility. LED cargo area lighting illuminates the bed for night work, while the power sliding rear window with defogger adds practical functionality. The gooseneck and fifth-wheel prep package enables heavy-duty trailer configurations, and snow plow preparation ensures year-round readiness.
Inside the cab, the Premium GMC Infotainment System with a 13.4-inch diagonal display controls all major functions through an intuitive interface. Wireless phone projection keeps your device connected without cables, and wireless charging eliminates the need for charging cables. The multicolor 15-inch head-up display projects essential information directly into your line of sight, reducing distraction during driving.
Safety technology rounds out the capability focus. Automatic emergency braking, forward collision alert, and lane departure warning provide active protection. HD surround vision with multiple camera provisions gives complete visibility around the truck, while ultrasonic front and rear park assist eases maneuvering in tight spaces. Trailer side blind zone alert specifically addresses trailer towing concerns with dedicated monitoring.
Comfort features reflect the AT4 premium positioning. Heated and ventilated front seats maintain your preferred temperature in any climate, with 10-way power adjustment for driver and passenger seats. Memory settings recall your personalized adjustments automatically. Heated rear outboard seats extend comfort to passengers, while automatic dual-zone climate control tailors temperature independently for driver and passenger.
The Sierra 3500HD AT4 combines professional-grade capability with premium comfort and advanced technology. This truck handles the work while providing the refinements you deserve during the drive.
Pricing assumes qualification for the GMS discount.
New 2026 GMCSierra 3500HD AT4 6.6L V8
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- 2026 GMC Sierra 3500HD
- Exterior Color
- Summit White
- Interior Color
- Jet Black With Kalahari Accents
- Body/Seating
- Truck/5 seats
- Seats
- 5 seats
- Transmission
- 10-Speed Automatic
- Drivetrain
- 4WD
- Engine
- 6.6L V8
- VIN
- 1GT4UVE76TF338206
- Stock Number
- 26650
GMC
Sierra 3500HD
Highlighted Features
- Lane departure
- Leather upholstery
- Automatic temperature control
- Emergency communication system
- Premium audio system
- Wireless phone connectivity
- Parking sensors
- Exterior parking camera front
- Exterior parking camera left
- Exterior parking camera right
- Exterior parking camera rear
- Front dual zone A/C
Included Packages & Accessories
- Gooseneck/5th Wheel Prep Package
- 7 Speakers
- AM/FM radio: SiriusXM with 360L
- Premium audio system: Premium GMC Infotainment System
- Air Conditioning
- Automatic temperature control
- Front dual zone A/C
- Rear window defroster
- Memory seat
- Power driver seat
- Power steering
- Power windows
- Remote keyless entry
- Steering wheel mounted audio controls
- Speed-sensing steering
- Traction control
- 4-Wheel Disc Brakes
- ABS brakes
- Dual front impact airbags
- Dual front side impact airbags
- Emergency communication system: OnStar Services capable
- Front anti-roll bar
- Front wheel independent suspension
- Low tire pressure warning
- Occupant sensing airbag
- Overhead airbag
- Power Sunroof
- Pickup Bed
- Brake assist
- Electronic Stability Control
- Lane Departure Warning System
- Exterior Parking Camera Rear
- Auto High-beam Headlights
- Delay-off headlights
- Front fog lights
- Fully automatic headlights
- Panic alarm
- Security system
- Speed control
- Heavy-Duty 80 Amp-Hour Battery
- Auto-dimming door mirrors
- Bed Mounted Assist Handle
- Black Sport Step
- Bumpers: body-color
- Heated door mirrors
- IntelliBeam Automatic High Beam on/Off
- Power door mirrors
- Rear step bumper
- Turn signal indicator mirrors
- All-Weather Floor Liners with AT4 Logo
- Auto-dimming Rear-View mirror
- Automatic Emergency Braking
- Buckle to Drive
- Compass
- Driver door bin
- Driver vanity mirror
- Following Distance Indicator
- Forward Collision Alert
- Front Pedestrian Braking
- Front reading lights
- Heated steering wheel
- Illuminated entry
- Outside temperature display
- Overhead console
- Passenger vanity mirror
- Rear reading lights
- Rear seat center armrest
- Tachometer
- Telescoping steering wheel
- Tilt steering wheel
- Trip computer
- Voltmeter
- Front Center Armrest
- Heated front seats
- Heated rear seats
- Perforated Front Leather Seat Trim
- Power passenger seat
- Split folding rear seat
- Ventilated front seats
- Passenger door bin
- Hitch Guidance with Hitch View
- Alloy wheels
- Wheels: 20" High Gloss Black 8 Spoke Aluminum
- Rain sensing wipers
- Variably intermittent wipers
- 3.73 Rear Axle Ratio
- AT4 Preferred Package
- Black Badging Package
- Preferred Equipment Group 4SB
- Snow Plow Prep/Camper Package
- Technology Package
- X31 Off-Road Package
- Bose Premium 7-Speaker Sound System
- Radio: AM/FM Stereo with Premium GMC Infotainment System
- SiriusXM with 360L Trial Subscription
- Steering Wheel Audio Controls
- Electric Rear-Window Defogger
- 120-Volt Bed Mounted Power Outlet
- 120-Volt Instrument Panel Power Outlet
- Driver Memory
- Power Front Windows with Passenger Express Up/Down
- Push Button Start
- Remote Vehicle Starter System
- Universal Home Remote
- Manual Tilt-Wheel/Telescoping Steering Column
- Off-Road Suspension
- Keyless Open and Start
- Hill Descent Control
- Unauthorized Entry Theft-Deterrent System
- 2-Speed Active Transfer Case
- 220 Amp Alternator
- Black GMC Emblems
- Black Sierra Nameplates
- Gloss Black Header and Grille Insert Bars
- LED Cargo Area Lighting
- LED Smoked Amber Roof Marker Lamps
- Rear Wheelhouse Liners
- Spray-on Pickup Bedliner with GMC Logo
- 2 Charge-Only Rear USB Ports
- 2 Charge/Data USB Ports Inside Center Console
- 2 USB Ports
- Auto-Dimming Inside Rearview Mirror with Camera
- Bed View Camera with Two Trailer Camera Provisions
- Floor-Mounted Center Console
- GMC Premium 13.4" Diagonal Information Display
- HD Surround Vision
- Multicolor 15" Diagonal Head-Up Display
- Premium Front Floor Liners with Removable Carpet Insert
- Premium Rear Floor Liners with Removable Carpet Insert
- Rear Cross Traffic Alert
- Safety Alert Seat
- Trailer Camera Provisions
- Trailer Side Blind Zone Alert
- Ultrasonic Front and Rear Park Assist
- Wireless Charging
- Wireless Phone Projection
- 10-Way Power Driver Seat Adjuster with Lumbar
- 10-Way Power Passenger Seat Adjuster with Lumbar
- Front Bucket Seats
- Heated 2nd Row Outboard Seats
- Heated Driver and Front Outboard Passenger Seats
- Ventilated Driver and Front Passenger Seats
- Deep-Tinted Glass
- Front Rain-Sensing Wipers
- Power Sliding Rear Window with Defogger
Included Packages & Options
- Technology Package$1,340
- Auto-Dimming Inside Rearview Mirror with Camera
- Multicolor 15" Diagonal Head-Up Display
- Snow Plow Prep/Camper Package$530
- 220 Amp Alternator
- AT4 Preferred Package$405
- Universal Home Remote
- Power Sliding Rear Window with Defogger
- LED Smoked Amber Roof Marker Lamps
Included Options
- Gooseneck/5th Wheel Prep Package$545
- Power Sunroof$995
- Black Sport Step$1,095
- All-Weather Floor Liners with AT4 Logo$295
Detailed Specifications
- 1-touch down
- 1-touch up
- Adaptive Cruise Control
- Air conditioning
- Auto-dimming rearview mirror
- Automatic temperature control
- Driver door bin
- Driver vanity mirror
- Emergency communication system: OnStar Services capable
- Front beverage holders
- Front dual zone A/C
- Heated steering wheel
- Illuminated entry
- Memory seat
- Overhead console
- Passenger door bin
- Passenger vanity mirror
- Power windows
- Proximity key: doors and push button start
- Rear beverage holders
- Rear door bins
- Remote engine start
- Remote keyless entry
- Speed control
- Surround View Monitor
- Telescoping steering wheel
- Tilt steering wheel
- Alloy wheels
- Front anti-roll bar
- Front tires: 275/65SR20.0E
- Front wheel independent suspension
- Power steering
- Rear tires: 275/65SR20.0E
- Single rear wheels
- Speed-sensing steering
- Tires: all-terrain
- Wheel size: 20"
- 1st row LCD monitors: 2
- AM/FM radio: SiriusXM with 360L
- Premium audio system: Premium GMC Infotainment System
- Primary LCD size: 13.4"
- Smart device integration
- Speaker type: Bose
- Speakers: 7
- Steering wheel mounted audio controls
- Turn-by-turn navigation directions: OnStar Turn-by-Turn Navigation
- Wireless Phone Charger: front
- Wireless phone connectivity
- Basic warranty: 36 months/36,000miles
- Corrosion perforation warranty: 72 months/100,000miles
- Maintenance warranty: 12 months/ unlimited distance
- Front center armrest
- Front seats: bucket
- Heated front seats
- Heated rear seats
- Leather upholstery
- Max seating capacity: 5
- Power 2-way driver lumbar support
- Power 2-way passenger lumbar support
- Power driver seat
- Power passenger seat
- Rear seat center armrest
- Rear seats: split-bench
- Rear seats Folding position: fold-up cushion
- Seat Upholstery: leather
- Split folding rear seat
- Ventilated front seats
- Cylinder configuration: V-8
- Drive type: four-wheel
- Electric motor 1 torque: none
- Electric motor horsepower: none
- Engine liters: 6.6L
- Engine location: front
- Fuel tank capacity: 36.0gal.
- Hybrid electric powertrain type: none
- Hybrid system combined power torque: none
- Hybrid system net power: none
- Hybrid traction battery type: none
- Manual-shift auto
- Mode select transmission
- Rear locking differential
- Transmission: 10 speed automatic
- Variable valve control
- Ground clearance (min): 284mm (11.2")
- Auto-dimming door mirrors
- Bedliner
- Bumpers: body-color
- Heated door mirrors
- Hitch Class: IV
- Left rear passenger door: conventional
- Power door mirrors
- Rear cargo: tailgate
- Rear step bumper
- Right rear passenger: conventional
- Skid plates
- Trailer hitch
- Trailer sway control
- Turn signal indicator mirrors
- Engine displacement: 6.6 L
- Exterior body width: 2,079mm (81.8")
- Exterior height: 2,054mm (80.9")
- Exterior length: 6,369mm (250.8")
- Front hiproom: 1,554mm (61.2")
- Front legroom: 1,131mm (44.5")
- Front shoulder room: 1,677mm (66.0")
- Rear headroom: 1,019mm (40.1")
- Rear hiproom: 1,530mm (60.2")
- Rear legroom: 1,102mm (43.4")
- Rear shoulder room: 1,659mm (65.3")
- Turning radius: 8.0m (26.3')
- Wheelbase: 4,039mm (159.0")
- Appearance: digital/analog
- Auto high-beam headlights
- Blind spot: warning
- Compass
- Configurable
- Delay-off headlights
- Exterior parking camera cargo
- Exterior parking camera front
- Exterior parking camera left
- Exterior parking camera rear
- Exterior parking camera right
- Front fog lights
- Front reading lights
- Fully automatic headlights
- Lane departure: warning
- Low tire pressure warning
- Oil pressure gauge
- Outside temperature display
- Parking sensors: front and rear
- Rain sensing wipers
- Rear reading lights
- Rear window defroster
- Tachometer
- Trip computer
- Variably intermittent wipers
- Voltmeter
- 4 wheel disc brakes
- ABS brakes
- Brake assist
- Dual front impact airbags
- Dual front side impact airbags
- Electronic stability
- Forward collision: mitigation
- Front pedestrian detection: prevention
- Ignition disable
- Occupant sensing airbag
- Overhead airbag
- Panic alarm
- Perimeter/approach lights
- Rear collision: warning
- Security system
- Traction control
Standard Features
- Auto-Dimming Inside Rearview Mirror with Camera
- Multicolor 15" Diagonal Head-Up Display
- 220 Amp Alternator
- Universal Home Remote
- Power Sliding Rear Window with Defogger
- LED Smoked Amber Roof Marker Lamps
- Safety Alert Seat
- Rear Cross Traffic Alert
- Trailer Side Blind Zone Alert
- Wireless Phone Projection
- Bose Premium 7-Speaker Sound System
- SiriusXM with 360L Trial Subscription
- Floor-Mounted Center Console
- Electric Rear-Window Defogger
- Push Button Start
- Remote Vehicle Starter System
- Keyless Open and Start
- Premium Front Floor Liners with Removable Carpet Insert
- Premium Rear Floor Liners with Removable Carpet Insert
- 120-Volt Instrument Panel Power Outlet
- 120-Volt Bed Mounted Power Outlet
- 2 Charge-Only Rear USB Ports
- 2 USB Ports
- 2 Charge/Data USB Ports Inside Center Console
- HD Surround Vision
- Bed View Camera with Two Trailer Camera Provisions
- Spray-on Pickup Bedliner with GMC Logo
- Trailer Camera Provisions
- Heated Driver and Front Outboard Passenger Seats
- Ventilated Driver and Front Passenger Seats
- Heated 2nd Row Outboard Seats
- Deep-Tinted Glass
- Gloss Black Header and Grille Insert Bars
- Steering Wheel Audio Controls
- Manual Tilt-Wheel/Telescoping Steering Column
- LED Cargo Area Lighting
- Unauthorized Entry Theft-Deterrent System
- Power Front Windows with Passenger Express Up/Down
- Wireless Charging
- Ultrasonic Front and Rear Park Assist
- Rear Wheelhouse Liners
- Front Rain-Sensing Wipers
- X31 Off-Road Package
- 2-Speed Active Transfer Case
- 10-Way Power Driver Seat Adjuster with Lumbar
- 10-Way Power Passenger Seat Adjuster with Lumbar
- Driver Memory
- Black GMC Emblems
- Black Sierra Nameplates
- Hill Descent Control
- Off-Road Suspension
- GMC Premium 13.4" Diagonal Information Display
Dealer Notes
- MSRP
- $81,680
- Doc and CVR Fee
- Please Call
- Everyone Price
- $73,857
- GM Employee Price
- Please Call
- We're here to help: (877) 484-2975
- We're here to help: (877) 484-2975