Elevate Your Driving Experience with the Uncompromising 2026 GMC Sierra 3500HD SLTPrepare to be captivated by the unparalleled power and refined elega… Read More…
Elevate Your Driving Experience with the Uncompromising 2026 GMC Sierra 3500HD SLT
Prepare to be captivated by the unparalleled power and refined elegance of the 2026 GMC Sierra 3500HD SLT. This exceptional heavy-duty pickup is engineered to conquer any challenge, whether you're tackling rugged terrain or navigating the demands of your daily life.
Boasting a powerful 6.6L V8 engine mated to a 10-Speed Automatic transmission, the Sierra 3500HD SLT delivers the performance you need to tackle any task with confidence. Equipped with 4-Wheel Drive, this truck is ready to take on the toughest jobs and the most demanding adventures.
Elevate your driving experience with the Sierra 3500HD SLT's impressive array of premium features, including the Bose Premium 7-Speaker Sound System, Off-Road Suspension, Exterior Parking Camera Rear, and Hill Descent Control. Stay connected and in control with the 220 Amp Alternator, LED Smoked Amber Roof Marker Lamps, and the 2 Charge/Data USB Ports inside the center console.
Indulge in the ultimate in comfort and convenience with the Spray-on Pickup Bedliner with GMC Logo, All-Weather Floor Liners, Floor-Mounted Center Console, Heated Steering Wheel, and Wireless Charging. The Front Bucket Seats with Heated and Ventilated Driver and Front Passenger Seats ensure you and your passengers travel in unparalleled comfort.
Complement your rugged lifestyle with the Sierra 3500HD SLT's striking Onyx Black exterior and the 20 Bright Face Wheels with Dark Painted Pockets. This truck is not only a workhorse, but a true head-turner on the road.
Why Buy from Weirs Buick GMC?
Weirs Buick GMC has proudly served Arundel, Kennebunk, Kennebunkport, and all of Maine for over 65 years. Our dedicated team ensures that whether you're looking to buy, sell, or lease a Buick or GMC in Maine, your experience is seamless and enjoyable. We serve customers from Westbrook, Portland, Augusta, Auburn, Sanford, Portsmouth, and across New England.
As your trusted GMC dealer in Maine, we offer competitive pricing comparable to other GMC and Buick dealers in the region. In addition to our wide selection of vehicles, we sell and service Fisher snow plows, ensuring you're ready for Maine's tough winters. Conveniently located on Route 1 in Arundel, we invite you to stop in and see why we've been the go-to dealership for generations.
Visit us online at www.weirsbuickgmc.com or stop by today to experience the Weirs difference!
Some vehicle images may be digitally enhanced to improve online presentation. These images may not display all cosmetic details. Price includes: $500 - Bonus Cash. Exp. 03/31/2026 $500 - Purchase Allowance. Exp. 03/31/2026 Read Less
Chassis Details
Stock Number
G25800
Stock Type
New
Year
2026
Make
GMC
Model
Sierra 3500
Class
3
GVWR
11,550
Drivetrain
4WD
Cab Type
Crew
Vehicle Trim
SLT
Vehicle VIN
1GT4UUE79TF148538
Interior Color
Jet Black, Perforated Leather-appointed front seat trim
Seating Capacity
6
Exterior Color Description
Onyx Black
Engine Cylinder Count
8
Engine
6.6L V8 Gas engine
Transmission Type
Automatic
Fuel Type
Gasoline
Engine Model
L8T
Engine Size (L)
6.6
Horsepower
401
Brake Type
Hydraulic
Vehicle Options
Floor covering, color-keyed carpeting
GMC Premium information Display- 13.4" diagonal Multicolor touch screen
Mirrors, outside power-adjustable vertical trailering with heated and auto-dimming upper glass, (driver and passenger) lower convex mirrors, turn signal indicators, puddle lamps, perimeter lighting, auxiliary lighting, power folding/extending (extends 3.31" [84.25mm])
Air vents, rear
Bumper, front chrome lower
Lane Departure Warning (Included and only available with (PDI) Sierra HD Pro Safety.)
Glass, deep-tinted
Bed Step, Black integrated on forward portion of bed on driver and passenger side
Steering wheel, heated
Steering, Digital Variable Steering Assist This system automatically adjusts steering based on speed, road conditions, and other inputs to reduce driver effort and fatigue
Engine, 6.6L V8 with Direct Injection and Variable Valve Timing, gasoline (401 hp [299 kW] @ 5200 rpm, 464 lb-ft of torque [629 N-m] @ 4000 rpm) (STD)
Forward Collision Alert (Included and only available with (PDI) Sierra HD Pro Safety.)
Wipers, front rain-sensing
Airbags, Dual-stage frontal airbags for driver and front outboard passenger; Seat-mounted side-impact airbags for driver and front outboard passenger; Head-curtain airbags for front and rear outboard seating positions; Includes front outboard Passenger Sensing System for frontal outboard passenger airbag (Always use seat belts and child restraints. Children are safer when properly secured in a rear seat in the appropriate child restraint. See the Owner's Manual for more information.)
USB Ports, 2, Charge/Data ports located on instrument panel
Daytime Running Lamps LED signature lighting
SiriusXM
Power outlet, instrument panel, 120-volt (400 watts shared with (KC9) bed mounted power outlet)
ProGrade Trailering System includes (PZ8) Hitch Guidance with Hitch View and (UET) In-vehicle Trailering App
Remote vehicle starter system
Wi-Fi Hotspot capable (Terms and limitations apply. See onstar.com or dealer for details.)
Floor mats, carpeted rear (Deleted when LPO floor liners are ordered or (BKF) Premium Floor Liners are ordered.)
Seat Belt Adjustable Guide Loops, front row only
Tire, spare LT275/70R18 all-terrain, blackwall (Included and only available with (QF6) LT275/70R18E all-terrain, blackwall tires or (QF9) LT275/65R20 all-terrain, blackwall tires with (E63) pickup bed models.)
LED Cargo Area Lighting located in cargo bed activated with switch on center switch bank or key fob
Transmission, 10-Speed automatic (STD)
Brakes, 4-wheel antilock, 4-wheel disc with DURALIFE rotors
LED Signature DRL's
Rear axle, 3.73 ratio (Requires (L8T) 6.6L V8 gas engine.)
Bumper, rear chrome with bumper CornerSteps
Audio System, 13.4" diagonal Premium GMC Infotainment System with Google built in apps such as navigation and voice assistance, includes color touch-screen, multi-touch display, AM/FM stereo, Bluetooth streaming audio for music and most phones; featuring wireless Android Auto and Apple CarPlay capability for compatible phones. (STD)
Seat trim, Perforated Leather-appointed front outboard seating positions
Window, power front, passenger express up/down
Tire carrier lock keyed cylinder lock that utilizes same key as ignition and door
Single Rear Wheels
In-Vehicle Trailering App System, includes checklist, trailer maintenance reminders, trailer security alerts, trailer mileage, tow/haul reminder, trailer electrical diagnostics and Trailer Tire Pressure Monitor System module (Includes trailer tire pressure monitoring alert when (PTT) trailer tire pressure monitor sensors are installed.)
Air filter, heavy-duty
Teen Driver a configurable feature that lets you activate customizable vehicle settings associated with a key fob, to help encourage safe driving behavior. It can limit certain available vehicle features, and it prevents certain safety systems from being turned off. An in-vehicle report card gives you information on driving habits and helps you to continue to coach your new driver
Window, power front, drivers express up/down
Cooling, external engine oil cooler
Theft-deterrent system, unauthorized entry
Cruise control, steering wheel-mounted
Rear Seat Reminder
SiriusXM with 360L Trial Subscription. SiriusXM with 360L transforms your customers' ride with our most extensive and personalized radio experience on the road. (IMPORTANT: The SiriusXM trial subscription is not provided on vehicles that are ordered for Fleet Daily Rental ("FDR") use. Trial subscription is subject to the SiriusXM Customer Agreement and privacy policy, visit siriusxm.com which includes full terms and how to cancel. All fees, content, features, and availability are subject to change. Some features require GM connected vehicle services.)
Indicator-Seat Belt WARNING, Rear Seat (Requires Crew Cab or Double Cab model.)
Battery, heavy-duty 720 cold-cranking amps/80 Amp-hr maintenance-free with rundown protection and retained accessory power (Included and only available with (L8T) 6.6L V8 gas engine.)
Brake lining wear indicator
Exterior Temperature Display located in radio display
Keyless Open and Start includes remote keyless entry
Door locks, power
Seat adjuster, driver 10-way power including lumbar
Lamps, cargo area, cab mounted integrated with center high mount stop lamp, with switch in bank on left side of steering wheel
Moldings, beltline, stainless steel
Driver Information Center, enhanced, 12.3" diagonal reconfigurable multicolor digital display
Following Distance Indicator (Included and only available with (PDI) Sierra HD Pro Safety.)
USB ports, (2) charge-only, rear
Frame, fully-boxed, hydroformed front section and a fully-boxed stamped rear section
IntelliBeam, automatic high beam on/off (Included and only available with (PDI) Sierra HD Pro Safety.)
Hitch Guidance with Hitch View with image adjustment, Pan/Zoom/Tilt
Push Button Start
Auto-locking rear differential
Buckle to Drive prevents vehicle from being shifted out of Park until driver seat belt is fastened; times out after 20 seconds and encourages seat belt use (Included and only available with (PDI) Sierra HD Pro Safety)
GVWR, 11,550 lbs. (5239 kg) with single rear wheels (STD) (Included and only available with TK30743 model and (L8T) 6.6L V8 gas engine. Requires single rear wheels.)
Steering wheel audio controls
Grille, Chrome surround with chrome insert bars
Air conditioning, dual-zone automatic climate control
Bluetooth for phone connectivity to vehicle infotainment system
Cargo tie downs (12), fixed, rated at 500 lbs per corner
Driver memory, recalls driver "presets" for power driver seat and outside mirrors
Compass, located in instrument cluster
Wireless Phone Projection for Apple CarPlay and Android Auto
Seat adjuster, passenger 10-way power including lumbar
Wheelhouse liners, rear (Not available with dual rear wheel models.)
Taillamps, Animated LED Signature Tail, Stop, turn and Reverse lamps
Mirror caps, chrome
Suspension Package (Not available with (X31) Off-Road Package.)
Headlamps, Animated LED projectors, LED turn signals and Daytime Running Lamps
HD Rear Vision Camera (Removed with (UV2) HD Surround Vision.)
Seat, Up-level Rear with Storage Package, 60/40 folding bench for Crew Cab models includes full-length bench seat, seatback storage on left and right side, center fold out armrest with 2 cupholders, full cab width underseat storage, (includes child seat top tether anchor)
Front Pedestrian Braking (Included and only available with (PDI) Sierra HD Pro Safety.)
Tailgate, gate function manual with EZ Lift includes power lock and release, includes hitch area light
Tire Pressure Monitoring System auto learn, includes Tire Fill Alert (does not apply to spare tire)
Transfer case, two-speed active electronic Autotrac with push button control (Requires 4WD models.)
Windows, power rear, express down
Pickup bed includes bed assist step
Power outlet, bed mounted, 120-volt (400 watts shared with (KI4) instrument panel mounted power outlet)
Steering wheel, wrapped
Tailgate and bed rail protection caps, top
Steering column, manual Tilt-Wheel and telescoping
Hitch Guidance dynamic single line to aid in truck trailer alignment for hitching
Defogger, rear-window electric
CornerStep, rear bumper
Trailering Package includes trailer hitch, 7-pin and 4-pin connectors and (CTT) Hitch Guidance (Deleted when (ZW9) pickup bed delete is ordered.)
OnStar Services capable (See onstar.com for details and limitations. Services vary by model. Service plan required.)
Floor mats, carpeted front (Deleted when LPO floor liners are ordered or (BKF) Premium Floor Liners are ordered.)
Fog lamps, LED
Automatic Emergency Braking (Included and only available with (PDI) Sierra HD Pro Safety.)
OnStar Basics (OnStar Fleet Basics for Fleet) Drive confidently with core OnStar services including remote commands, built-in voice assistance, real-time traffic and navigation, and Automatic Crash Response to help if you're in need. (Requires (UE1) OnStar. OnStar Basics includes remote commands, Navigation, Voice Assistance, and Automatic Crash Response, for eligible vehicles with compatible software. OnStar Basics is standard for 8 years; OnStar plan, working electrical system, cell reception and GPS signal required. OnStar links to emergency services. Service coverage varies with conditions and location. Service availability, features and functionality vary by device and software version. See onstar.com for details and limitations.)
Assist handles, front A-pillar mounted for driver and passenger, rear B-pillar mounted
Four wheel drive
StabiliTrak, stability control system with Proactive Roll Avoidance and traction control includes electronic trailer sway control and hill start assist
Capless Fuel Fill (Requires (L8T) 6.6L gas V8 engine.)
Door handles, chrome
Trailering Information Label provides max trailer ratings for tongue weight, conventional, gooseneck and 5th wheel trailering
Seating, heated driver and front outboard passenger
Trailer brake controller, integrated
Sierra HD Pro Safety includes (UEU) Forward Collision Alert, (UE4) Following Distance Indicator, (UKJ) Front Pedestrian Braking, (TQ5) IntelliBeam, (UFL) Lane Departure Warning, (T8Z) Buckle to Drive and (UHY) Automatic Emergency Braking
Center Console, floor-mounted
Suspension, Off-Road
SLT Preferred Equipment Group
Tailgate, GMC MultiPro Tailgate
LPO, All-weather floor liner, 1st and 2nd rows
Hill Descent Control
Tires, LT275/65R20 all-terrain, blackwall
Seats, front bucket with center console
SLT Convenience Package
Option/package discount
X31 Off-Road and Protection Package
X31 Off-Road Package
Seats, ventilated driver and front passenger
Bose Sound System, premium 7-speaker system
License plate kit, front
Jet Black, Perforated Leather-appointed front seat trim
Lamps, Smoked Amber roof marker, (LED)
Emissions, Colorado, Connecticut, Delaware, Maine, Maryland, Massachusetts, Minnesota, Nevada, New Jersey, New York, Oregon, Pennsylvania, Rhode Island, Vermont and Washington state requirements
Skid Plates
Wheels, 20" (50.8 cm) Bright face wheels with dark painted pockets