Key Features

An icon representing Body Type
Body Type Pickup
An icon representing Fuel Type
Fuel Type
An icon representing Engine Description
Engine Description
An icon representing Drivetrain
Drivetrain 4WD
An icon representing Cab Type
Cab Type Crew Cab
An icon representing Trim
Trim AT4

Vehicle Details

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Overview

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Stock Number

G264221

Stock Type

New

Year

2026

Make
GMC
Model
Sierra 2500
Model Code

TK20743

Cab Type

Crew

Vehicle Trim

AT4

Body Type
Pickup
VIN

1GT4UPEY7TF176137

Brake Type

Hydraulic

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Dimensions

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Dimensions

Class

3

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Drivetrain

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Drivetrain

4WD

Transmission

Transmission Type

Automatic

manufacturing

Engine

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Engine Description

6.6L Duramax Turbo-Diesel V8 engine

Engine Cylinder Count

8

Engine Model

L5P

Engine Size (L)

6.6

Horsepower

470

Fuel Type

Diesel

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Seating

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Seat Dimensions

Seating Capacity

5

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Colors

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Exterior Color

Red

Interior Color

Jet Black with Kalahari accents, Perforated Front Leather seat trim

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Vehicle Options

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  • SiriusXM Trial Subscription
  • Wireless phone projection for Apple CarPlay and Android Auto
  • Air vents, rear
  • Lane Departure Warning (Included and only available with (PDI) Sierra HD Pro Safety.)
  • Glass, deep-tinted
  • Grille (Gloss Black header and grille insert bars with Black Chrome accents.)
  • Steering wheel, heated
  • Door handles, body-color
  • Forward Collision Alert (Included and only available with (PDI) Sierra HD Pro Safety.)
  • Trailering Information Label provides max trailer ratings for tongue weight, conventional, gooseneck and 5th wheel trailering
  • Adaptive Cruise Control
  • 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.)
  • Bedliner, Spray-on, Pickup bedliner with GMC logo (does not include spray-on liner on tailgate due to Black composite inner panel) (Available with Ship Thru code (SQE), (TCE) or (TCH), not available with any other Ship Thru code.)
  • Wheels, 20" (50.8 cm) High Gloss black aluminum wheels 8 spokes (STD)
  • 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
  • Tire, spare LT275/70R18 all-terrain, blackwall
  • Remote vehicle starter system
  • Wi-Fi Hotspot capable (Terms and limitations apply. See onstar.com or dealer for details.)
  • Seat Belt Adjustable Guide Loops, front row only
  • LED Cargo Area Lighting located in cargo bed activated with switch on center switch bank or key fob
  • Rear Seat Reminder
  • Seats, ventilated driver and front passenger
  • Moldings, beltline, Black
  • Brakes, 4-wheel antilock, 4-wheel disc with DURALIFE rotors
  • LED Signature DRL's
  • Driver memory recalls driver "presets" for power driver seat and outside mirrors
  • X31 Off-Road Package includes (JHD) Hill Descent Control, (NZZ) skid plates, Off-Road suspension and Twin-tube Rancho shocks
  • HD Surround Vision provides the driver with an overhead view of the scene around the vehicle on a center stack display. Includes front camera washer.
  • Lamps, cargo area cab mounted integrated with center high mount stop lamp, with switch in bank on left side of steering wheel
  • Window, power front, passenger express up/down
  • Tire carrier lock keyed cylinder lock that utilizes same key as ignition and door
  • 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
  • StabiliTrak, stability control system with Proactive Roll Avoidance and traction control, includes electronic trailer sway control and hill start assist
  • Hill Descent Control
  • Cooling, external engine oil cooler
  • Theft-deterrent system, unauthorized entry
  • 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)
  • Rear Cross Traffic Alert
  • 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.)
  • OnStar Basics (OnStar Fleet Basics for Fleet) Drive confidently with core OnStar services including select 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 select 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.)
  • Daytime Running Lamps, LED signature lighting
  • Suspension, Off-Road includes twin-tube shocks
  • Mirrors, outside power-adjustable vertical trailering with heated and auto-dimming upper glass, (driver and passenger), lower convex mirrors, turn signal indicators, puddle lamps, (U12) perimeter lighting, auxiliary lighting, power folding/extending (extends 3.31" [84.25mm]) lighting
  • Brake lining wear indicator
  • Trailer Side Blind Zone Alert
  • USB Ports, 2, Charge/Data ports located inside center console
  • Mirror caps, high gloss Black
  • Keyless Open and Start includes remote keyless entry
  • Headlamps, Animated LED projectors LED turn signals and Daytime Running Lamps
  • Door locks, power
  • Seat adjuster, driver 10-way power including lumbar
  • Premium Floor Liners with removable carpet insert, front
  • Tire Pressure Monitoring System, auto learn includes Tire Fill Alert (does not apply to spare tire)
  • 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.)
  • Tires, LT275/65R20 all-terrain, blackwall (STD)
  • Bumper, front, body-color lower
  • Driver Information Center, enhanced, 12.3" diagonal reconfigurable multicolor digital display
  • Assist handles front A-pillar mounted for driver and passenger, rear B-pillar mounted
  • Bed View Camera, camera in the CHMSL to show a view of the cargo bed display located in infotainment screen, includes Two Trailer Camera Provisions
  • Seats, front bucket with center console (STD)
  • 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
  • Steering wheel audio controls
  • Windows, power front, drivers express up/down
  • Air conditioning, dual-zone automatic climate control
  • Recovery hooks, Red
  • Wireless Charging
  • Bluetooth for phone connectivity to vehicle infotainment system
  • Cargo tie downs (12), fixed, rated at 500 lbs per corner
  • Bose Sound System, premium 7-speaker system with Richbass woofer
  • Compass, located in instrument cluster
  • GMC Premium information Display- 13.4" diagonal Multicolor touch screen
  • Seat adjuster, passenger 10-way power including lumbar
  • Taillamps, Animated LED Signature Tail, Stop, turn and Reverse lamps
  • Premium Floor Liners with removable carpet insert, rear
  • USB Ports, 2 (first row) located on console
  • Mirror, inside rearview auto-dimming
  • Wheelhouse liners, rear
  • Cooling, auxiliary external transmission oil cooler
  • Air filtration monitoring
  • Seat trim, Perforated front Leather
  • Tailgate, gate function manual with EZ Lift includes power lock and release, includes hitch area light
  • Seat, Up-level Rear with Storage Package 60/40 folding bench, includes full-length bench seat, seatback storage on left and right side, center fold out armrest with 2 cupholders, full cab width under-seat storage, (includes child seat top tether anchor)
  • Windows, power rear, express down
  • Trailer Camera Provisions and trailer viewing software
  • Pickup bed includes bed assist step
  • Power outlet, bed mounted, 120-volt (400 watts shared with (KI4) instrument panel mounted power outlet)
  • Front Pedestrian Braking (Included and only available with (PDI) Sierra HD Pro Safety.)
  • Steering wheel, wrapped
  • Front and Rear Park Assist, ultrasonic
  • 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
  • Steering, Digital Variable Steering Assist this system automatically adjusts steering based on speed, road conditions, and other inputs to reduce driver effort and fatigue
  • Defogger, rear-window electric
  • Skid Plates protect the oil pan, front axle and transfer case
  • Tailgate, GMC MultiPro Tailgate with six functional load/access features NOTE: Auto release can be disabled if ball hitch is installed. See Owner's manual for details
  • 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.)
  • CornerStep, rear bumper
  • Exterior Temperature Display, located in radio display
  • OnStar Services capable (See onstar.com for details and limitations. Services vary by model. Service plan required.)
  • Rear Seat Belt Indicator
  • Trailering Package includes trailer hitch, 7-pin and 4-pin connectors and (CTT) Hitch Guidance
  • Center Console, floor-mounted with cup holders, cell phone storage, power cord management, hanging file folder capability
  • Fog lamps, LED
  • Safety Alert Seat
  • Automatic Emergency Braking (Included and only available with (PDI) Sierra HD Pro Safety.)
  • Four wheel drive
  • Bumper, rear body-color with bumper CornerSteps
  • Seats, heated second row outboard seats
  • Transfer case, two-speed active, electronic Autotrac with push button control
  • 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
  • Floor covering, color-keyed carpeting
  • Bed Step, Black integrated on forward portion of bed on driver and passenger side
  • Engine, Duramax 6.6L Turbo-Diesel V8, B20-Diesel compatible
  • Engine block heater
  • Multicolor 15" Diagonal Head-Up Display
  • Volcanic Red Tintcoat
  • Exhaust brake
  • High idle switch
  • Universal Home Remote
  • AT4 Preferred Package
  • Jet Black with Kalahari accents, Perforated Front Leather seat trim
  • Rear Camera Mirror
  • Winter Grille Cover
  • LPO, Hitch Package
  • AT4 Preferred Equipment Group
  • Option/package discount
  • Assist steps, power retractable, Black
  • Battery, heavy-duty dual 730 cold-cranking amps/70 Amp-hr
  • Sunroof, power
  • License plate kit, front, Incandescent lighting
  • GVWR, 11,350 lbs. (5148 kg)
  • Alternator, 220 amp
  • Emissions, Federal requirements
  • Lamps, Smoked Amber roof marker, (LED)
  • Transmission, 10-speed automatic
  • Window, power, rear sliding with rear defogger
  • LPO, All-weather floor liners, 1st and 2nd rows
  • Capped Fuel Fill
  • Rear axle, 3.42 ratio
  • AT4 Premium Plus Package
  • Technology Package
  • Gooseneck / 5th Wheel Prep Package -- Hitch platform to accept Gooseneck or 5th Wheel hitch.
  • AT4 PREMIUM PLUS PACKAGE DISCOUNT

Bruner Early GMC ci2 Test Site

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Listing Notes
2026 GMC Sierra 2500HD AT4 - Heavy Duty Luxury in Brownwood, TX
Conquer the toughest terrain in Central Texas with the 2026 GMC Sierra 2500HD AT4, now available at Bruner Auto Group in Brownwood. This isn't just a heavy-duty truck; its a premium off-road machine designed for those who demand Professional Grade performance without sacrificing high-end luxury. Whether youre hauling equipment to Early, managing a ranch in Comanche, or pulling a massive boat to Lake Brownwood, this Volcanic Red Tintcoat powerhouse is ready to dominate.

Legendary Duramax Diesel & Allison Transmission
Under the hood, this Sierra 2500HD is powered by the world-class Duramax 6.6L V8 Turbodiesel engine, producing a massive 975 lb-ft of torque and 470 horsepower. Paired with the iconic Allison 10-Speed Automatic Transmission, you get smooth, intelligent power delivery that makes even the heaviest loads feel light. With its specialized off-road suspension (X31 Package) and robust 4WD system, this truck is engineered to thrive where the pavement ends in the Texas Hill Country.

AT4 Signature Luxury & Style
Finished in a bold Volcanic Red Tintcoat with an exclusive Jet Black with Kalahari Accents Leather interior, the AT4 trim provides a sophisticated, high-contrast look that commands attention.

Key Equipment & Premium Features:

AT4 Premium Plus Package: The ultimate combination of luxury and utility.

Technology Package: Stay informed with the 15 Diagonal Head-Up Display and Rear Camera Mirror.

GMC MultiPro Tailgate: Six unique functions to improve loading, unloading, and accessing the bed.

Gooseneck/5th Wheel Prep Package: Ready for the big trailers from day one.

Premium Comfort: Heated and ventilated front leather seats, heated second-row seats, and a heated steering wheel for year-round comfort in Brown County.

Bose Premium Audio: Experience concert-quality sound with the 7-Speaker Sound System.

Power Sunroof: Open up the cabin to the wide-open Texas sky.

Safety & Trailering Confidence
The 2026 Sierra 2500HD AT4 is built to work as hard as you do, featuring GMC Pro Safety and advanced trailering tech:

HD Surround Vision with Bed View: A 360-degree view to make hitching and parking effortless.

Hitch Guidance with Hitch View: Perfect for one-person hookups.

Blind Zone Alert: Specialized for trailers to keep you safe on the highway between Brownwood and Abilene.

Automatic Emergency Braking & Forward Collision Alert.

Why Choose Bruner Auto Group?
At Bruner Auto Group, located at 224 Early Blvd, weve served the Brownwood and Early communities for generations. We know that a truck in Central Texas is more than a vehicleit's a partner for your trade. We pride ourselves on a transparent, hometown buying experience with competitive financing and the best trade-in values in the region.

vAuto Vehicle Specifications (Copy/Paste)
Year/Make/Model: 2026 GMC Sierra 2500HD AT4

VIN: 1GT4UPEY7TF176137

Stock #: G264221

Exterior Color: Volcanic Red Tintcoat

Interior Color: Jet Black With Kalahari Accents Leather

Engine: Duramax 6.6L V8 Turbodiesel

Transmission: 10-Speed Automatic (Allison)

Drivetrain: 4WD

Body Style: 4D Crew Cab

Condition: New - Retail

Experience the AT4 difference today. Visit Bruner Auto Group in Brownwood to see this Volcanic Red beauty in person. Let us help you secure your next heavy-duty GMC and show you why we are the top choice for trucks in Central Texas.
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