Russ Braunecker Auto Group · Effingham, IL

2026 GMC Sierra 2500 HD AT4

7 miles · truck

1 / 36 photos

PUBLISHED DEALER DETAILS

Complete vehicle specifications

Year2026

MakeGMC

ModelSierra 2500 HD

TrimAT4

VIN1GT4UPE79TF429238

Stock number36401

Mileage7 miles

BodyPickup

Engine6.6L 8-cyl

Cylinders8

Displacement6.6L

TransmissionAutomatic

Drivetrain4WD

FuelGasoline

ExteriorSummit White

Towing16000

Vehicle description

Discover heavy-duty capability, premium comfort, and advanced technology with the new 2026 GMC Sierra 2500 HD SLT , available at Russ Braunecker Cadillac Buick GMC in Effingham, Illinois . Designed for drivers who need serious truck capability without sacrificing comfort and convenience, the Sierra 2500 HD SLT is an excellent choice for hauling equipment, towing trailers, tackling demanding jobs, and enjoying everyday driving in a full-size heavy-duty pickup. The 2026 GMC Sierra 2500 HD SLT offers powerful engine options to meet a variety of needs, including a 6.6L V8 gasoline engine paired with an Allison 10-speed automatic transmission. This engine produces 401 horsepower and 464 lb-ft of torque , delivering dependable performance for work and recreation. The exterior combines GMC's bold styling with practical heavy-duty functionality. A distinctive front grille, signature LED lighting, sculpted body lines, and 18-inch machined aluminum wheels with dark gray metallic accents give the SLT a confident appearance. The GMC MultiPro Tailgate adds versatility with multiple configurations designed to make accessing the truck bed, loading cargo, and handling equipment easier. Inside, the Sierra 2500 HD SLT offers a spacious cabin designed for comfort during long workdays and road trips. The interior features premium seating materials, heated front seats, power-adjustable front seating, and a heated steering wheel. Thoughtful storage, convenient controls, and generous passenger space help make this heavy-duty truck comfortable for both the driver and passengers. Technology helps keep you connected and informed wherever the road takes you. The 13.4-inch diagonal GMC Premium Infotainment System features Google built-in compatibility, providing access to helpful connected features. Wireless Apple CarPlay and Android Auto? compatibility make it easy to connect a compatible smartphone, while the 12.3-inch diagonal digital Driver Information Center displays important driving information. The Bose premium audio system further enhances your listening experience. The 2026 GMC Sierra 2500 HD SLT is engineered for demanding towing and hauling tasks. Its heavy-duty construction, powerful engine options, and available ProGrade Trailering System with an in-vehicle trailering app help drivers monitor trailer information and prepare for towing. Trailering mirrors, camera technologies, and the MultiPro Tailgate add further functionality to make towing easier. Safety and driver-assistance technologies provide additional support on the road and around the job site. GMC's standard Sierra HD Pro Safety suite includes driver-assistance features designed to help improve awareness, including adaptive cruise control, designed to make highway driving stress free. The various camera angles and driver convenience features are there to help keep you safe as you go. If you're searching for a new 2026 GMC Sierra 2500 HD SLT for sale near Effingham, IL , a new GMC heavy-duty pickup , a 2500 HD truck for towing and hauling , or a well-equipped work truck in Central Illinois, the Sierra SLT deserves a closer look. Its combination of heavy-duty capability, premium comfort, modern connectivity, and practical trailering technology makes it a versatile choice for both professional and personal use. At Russ Braunecker Cadillac Buick GMC , we're proud to offer an outstanding selection of new GMC trucks, competitive pricing, flexible financing options, and exceptional customer service. Our knowledgeable team is ready to help you explore the new 2026 GMC Sierra 2500 HD SLT and find the configuration that fits your needs.

Features & options (250)

Adaptive Cruise Control
Bluetooth®
Heated Steering Wheel
Remote Start
4WD/AWD
Android Auto
Apple CarPlay
Keyless Ignition System
Leather Seats
Wi-Fi Hotspot
Auto Dimming Mirror
Emergency Brake Assist
Lane Departure Warning
Wireless Phone Charging
Blind Spot Monitor
Forward Collision Warning
Navigation System
Parking Assistance
Rear View Camera
Tow Hitch/Tow Package
Automatic Climate Control
Entertainment System
Premium Sound System
SiriusXM Trial Subscription
Wireless phone projection
For Apple CarPlay and Android Auto
Wi-Fi Hotspot capable
May require additional optional equipment
13.4" diagonal GMC Premium Infotainment System with Google built-in
Bluetooth® streaming audio for music and select phones
Wireless Apple CarPlay capability for compatible phones
Wireless Android Auto capability for compatible phones
Customize and manage entertainment and vehicle feature setting
Voice-activated technology for phone
SiriusXM with 360L Trial Subscription
Place and receive hands-free phone calls
Rainsense automatic wipers
Side Bed Step
Black textured step pads help provide secure footing
Deep-tinted glass
Provides added protection from sun and glare
Grille (Gloss Black header and grille insert bars with Black Chrome accents.)
Body-color door handles
Spray-on bedliner
Includes GMC logo on all trims except PRO
18" LT275/70R18 all-terrain, blackwall spare tire
Cargo bed LED lighting
Provides light to find cargo in the bed
Black beltline moldings
Cab-mounted cargo area lamps
Activated by switch located on center switch bank
Illuminates the cargo bed area
Spare tire carrier lock
Helps keep spare tire secure
Outside power-adjustable vertical trailering mirrors with power folding/extending auto-dimming driver and passenger upper glass
Chrome mirror caps
AT4 and AT4X features high gloss Black mirror caps
Power folding/extending
Lower convex mirrors
Heated upper glass
Integrated turn signal indicators
Puddle lamps
Perimeter lighting
Auxiliary lighting
Extends 3.31-inches
High gloss Black mirror caps
Animated LED projectors headlamps with LED turn signals and Daytime Running Lamps
Body-color front bumper
IntelliBeam
Cargo tie-downs
12-fixed rated at 500 lbs. per corner
Animated LED Signature Tail lamps with Stop, turn and Reverse lamps
LED taillamps with LED stop lights and animation
Rear wheelhouse liners
Tailgate with EZ Lift assist, power lock & release
Hitch area lighting
Tailgate and bed rail protection caps
GMC MultiPro Tailgate
Power lock and release
CornerStep rear bumper
Located at each end of the rear bumper
Textured step pads to help provide secure footing
LED fog lamps
Body-color rear bumper
With integrated CornerSteps
22" LT265/60R22E all-terrain blackwall tires
22" Transit steel, painted Black wheels
Off-Road High Clearance Steps
Textured step pads help provide secure footing
22" Gloss Black aluminum wheels
Body color wheel arch moldings
Power sunroof
Retracts into the roof
Offers tilt and slide features with express-open and -close
Summit White
Front license plate bracket
Smoked Amber LED roof marker lamps
Roof-mounted lamps near the front of the cab
You can always override the feature and take control
Carpeted floor covering
Color-keyed to match the interior
Rear air vents
Provides cabin comfort for rear occupants
120-volt power outlet
3-prong auxiliary household-style outlet
Located on the instrument panel
Rear Seat Reminder
Ventilated driver and front passenger seats
Individually controlled
Cooling feature includes both seatbacks and cushions
Driver memory
Power windows with driver and front passenger express-up/down
If obstruction is detected, the anti-pinch feature will auto-reverse
Theft-deterrent unauthorized entry system
Helps deter unauthorized entry, helping to protect your vehicle
USB ports
(2) Data/charge ports located inside center console
Keyless Open and Start
Lockout protection helps you avoid locking keys in the vehicle
Power door locks
10-way power driver seat with power lumbar
Includes 8-way power driver seat
Includes a 2-way power lumbar control
Premium front floor liners with removable carpet insert
12.3" diagonal color Driver Information Center
High definition display provides crisp, premium appearance
Assist handles
Front A-pillar mounted for Driver and Passenger
Rear B-pillar mounted
Front bucket seats
(2) Charge ports located on rear of console
Steering-wheel mounted controls
Power windows with driver express-up/down
Dual-zone automatic climate control
Allows individual climate settings for both driver and front passenger
Wireless Charging
Uses induction technology for select portable electronic devices
Convenient charging location
Compass
Located in instrument cluster
10-way power front passenger seat
Includes 8-way power front passenger seat
Premium rear floor liners with removable carpet insert
(2) First row, located on console
Inside rearview auto-dimming mirror
Seat trim, Perforated front Leather
Up-level rear seat with storage package
60/40 Full-length folding bench seat
Seatback storage on left and right side
Center fold out armrest with 2 cupholders
Underseat storage (full cab width)
Power windows with rear express-down
120-volt box-mounted power outlet
Located in the pickup bed
Wrapped steering wheel
Manual tilt and telescoping steering column
Rear window defogger
Outside temperature display
Located in infotainment display
Front center console
Heated rear outboard seats
Passengers can manage heat settings with their own controls
Heated driver and front outboard passenger seats
Head-Up Display
Multi-color 15" diagonal Head-Up Display
Adjustable vertical position and brightness of the display
Universal Home Remote
3-channel programmable
Jet Black with Kalahari accents, Perforated Front Leather seat trim
Rear Camera Mirror
The feature also allows brightness, vertical tilt and zoom adjustments
Power sliding rear window with rear defogger
4-wheel antilock disc brakes
170-amp alternator
Heavy-Duty Air Filter
Hill Descent Control
Uses antilock braking to help provide a smooth, controlled descent
Activates by pushing a button below the instrument panel
Off-Road suspension
Heavy-duty 720 cold-cranking amps battery
80 Amp-hr
Maintenance-free with rundown protection and retained accessory power
Brake pad wear indicator
10,850 lbs. GVWR
Fully boxed frame
Hydroformed front section
High-strength steel
Push Button Start
Automatic locking rear differential
Red vertical recovery hooks
Two front frame-mounted
Pickup bed
Roll-formed high-strength steel
Includes bed assist step
Digital Variable Steering Assist
Skid plates
Help protect the front underbody, oil pan and transfer case
In-Vehicle Trailering App
Checklist
Trailer maintenance reminders
Trailer security alerts
Trailer mileage
Tow/haul reminder
Trailer electrical diagnostics
Four wheel drive
Autotrac 2-speed transfer case with push button controls
4-button control 2WD, Auto, 4WD, 4WD LO
2WD High for most on-road and highway situations
Automatically engages 4WD until traction is regained
Integrated trailer brake controller
Integrated with the antilock brake system (ABS)
Emissions, Federal requirements
Gooseneck / 5th Wheel Prep Package
Hitch platform to accept Gooseneck or 5th wheel hitch
Box mounted 7-pin trailer harness
ProGrade Trailering System
Hitch Guidance with Hitch View
X31 Off-Road Package
Twin-tube Rancho shocks
Trailering Package
Trailer hitch
Trailering hitch platform
Hitch Guidance
Sierra HD Pro Safety
Forward Collision Alert
Following Distance Indicator
Front Pedestrian Braking
Buckle to Drive
Automatic Emergency Braking
AT4 Preferred Package
Rear sliding power window
LED roof marker lamps
AT4 Preferred Equipment Group includes standard equipment
Heavy Duty Front Spring / Camper Package
AT4 Premium Plus Package
Technology Package
AT4 high clearance step
AT4 Preferred Package on AT4
Option/package discount
LED Daytime Running Lamps
Signature LED Daytime Running Lamps
Trailering Information Label
6 airbags
Dual-stage frontal airbags for driver and front outboard passenger
Head-curtain airbags for outboard seating positions
Seat Belt Adjustable Guide Loops
Front row only
HD Surround Vision
Can help you park or avoid vehicles and objects
Teen Driver

Dealer-provided information may change. Confirm availability, price, vehicle condition, taxes and fees with the selling dealership.

AutosXchange Intel

Vehicle price analysis

Live listings · within 100 miles of Effingham, Illinois

Asking price$78,950Dealer asking price · 7 mi

Market value$78,413Market value · based on 7 comparable cars

vs. market Fair price+0.7%Fair price · based on 7 comparable cars

Where this price sits

In the typical middle range · 43% of 7 similar listings ask more than this car.

Market value $78,413

This car$78,950

$73,695lowest$79,870highest

Middle 50% of asking pricesMarket valueThis car

Price vs. market value

−25%Market value+25%

Fair price$537 above the market value of $78,413

Price range

$73,695$79,870

5th lowest price of 8 similar listings within 100 milesTick marks the market value · range of 7 similar listings

AutosXchange Insights

Compared with 7 new 2026 GMC Sierra 2500 AT4 listings within 100 mi.
Priced $537 above the market value of 7 comparable cars — compare options, condition and history.
5th lowest price of 8 similar listings within 100 miles.
About 7 miles per year of age (U.S. average is roughly 12,000–14,000).
Stock # 36401 — mention it when you call or text.

How we calculate market value: comparable cars for sale now plus their last listed prices.

Cars this price is compared to

Same 2026 Sierra 2500 AT4 · new · within 100 miles of Effingham, Illinois. All 7 comparable cars for sale, nearest first.

2026 GMC Sierra 2500 HD AT4 for sale at Russ Braunecker Auto Group in Effingham, IL

Fair price

37 photos