Temecula Valley Buick GMC · Temecula, CA

2026 GMC Sierra 2500 HD AT4

1 miles · truck

1 / 37 photos

PUBLISHED DEALER DETAILS

Complete vehicle specifications

Year2026

MakeGMC

ModelSierra 2500 HD

TrimAT4

VIN1GT4UPEY5TF423056

Stock numberG261549

Mileage1 miles

BodyPickup

Engine6.6L V8 turbo

Cylinders8

Displacement6.6L

TransmissionAutomatic

Drivetrain4WD

FuelDiesel

ExteriorSterling Metallic

Towing20000

Vehicle description

This 2026 GMC Sierra 2500 HD AT4 Crew Cab 4WD is powered by the Duramax 6.6L Turbo-Diesel V8 with a 10-speed automatic, exhaust brake and engine block heater. Built for towing, it carries the Max Trailering Package with 3500 HD frame, 12-inch rear axle and gooseneck/5th wheel prep, plus trailer side blind zone alert and dual alternators. The AT4 Premium Plus Package adds a power sunroof, multi-color head-up display, rear camera mirror and power retractable assist steps. Sterling Metallic over Jet Black with Kalahari accents, on 20-inch high gloss black wheels. In stock at Temecula Valley Buick GMC in Temecula, CA. Stock #G261549. Price includes: $2000 - Buick GMC Bonus Cash 26-40AG-016 (Exp. 11/30/2026), $2500 - Buick & GMC Consumer Cash Program 26-40ACB-015 (Exp. 11/30/2026)

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
Turbo Charged Engine
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
3 Years SiriusXM
Enjoy channels curated by DJs, personalities, and tastemakers
18" LT275/70R18 all-terrain, blackwall spare tire
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
Rainsense automatic wipers
Spray-on bedliner
Includes GMC logo on all trims except PRO
20" high gloss Black aluminum wheels
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
Rear wheelhouse liners
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
20" LT275/65R20 all-terrain, blackwall tires
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
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
Winter Grille Cover
Black power-retractable assist steps with LED perimeter lighting
Textured step pads help provide secure footing
Retracts when not in use
Deploy Running Board mode for car wash cleaning
LED perimeter lighting
Power sunroof
Retracts into the roof
Offers tilt and slide features with express-open and -close
Front license plate bracket
Sterling Metallic
Carpeted floor covering
Color-keyed to match the interior
Rear air vents
Provides cabin comfort for rear occupants
Compass
Located in instrument cluster
You can always override the feature and take control
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
Seat trim, Perforated front Leather
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
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
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
All-weather floor liners with AT4 logo
Includes AT4 logo insert on 1st row liners
Provides coverage for first and second-row seating
4-wheel antilock disc brakes
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
Brake pad wear indicator
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)
Dual, 220 amp primary and 170 auxiliary amp alternators
11,750 lbs. GVWR
Heavy-duty dual batteries with 1460 cold-cranking amps
70 Amp-hr
Maintenance-free with rundown protection and retained accessory power
Emissions, California state 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
Max Trailering Package
3500 HD Frame
3500 HD Leaf Springs
12" Rear axle
3500 HD Shock Package
Gooseneck / 5th Wheel Prep provisions
Bed stamped holes with caps installed
Heavy Duty Front Spring / Camper Package
AT4 Premium Plus Package
Technology Package
AT4 high clearance step

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 50 miles of Temecula, California

Asking price$86,256Dealer asking price · 1 mi

Market value$83,956Market value · based on 65 comparable cars

vs. market Fair price+2.7%Fair price · based on 65 comparable cars

Where this price sits

Among the highest-priced · 5% of 65 similar listings ask more than this car.

Market value $83,956

This car$86,256

$72,108lowest$102,301highest

Middle 50% of asking pricesMarket valueThis car

Price vs. market value

−25%Market value+25%

Fair price$2,300 above the market value of $83,956

Price range

$72,108$102,301

62nd lowest price of 66 similar listings within 50 milesTick marks the market value · range of 65 similar listings

AutosXchange Insights

Compared with 65 new 2026 GMC Sierra 2500 AT4 listings within 50 mi.
Priced $2,300 above the market value of 65 comparable cars — compare options, condition and history.
62nd lowest price of 66 similar listings within 50 miles.
About 1 miles per year of age (U.S. average is roughly 12,000–14,000).
Stock # G261549 — mention it when you call or text.

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

Price history

Price tracked by AutosXchange since Nov 8, 2026. No price change at this dealership since Nov 8 ($86,256).

AutosXchange Intel Hub: Price changes for this model in California · This model in the Intel Hub · Market movers in California

Dealer-advertised asking prices as observed by AutosXchange (data as of Nov 12); earlier listings at other dealerships are shown by state only. Source: AutosXchange Intel Hub, autos-xchange.com/market.

Cars this price is compared to

Same 2026 Sierra 2500 AT4 · new · within 50 miles of Temecula, California. Showing the 12 nearest of 65 comparable cars for sale, nearest first.

2026 GMC Sierra 2500 HD AT4 for sale at Temecula Valley Buick GMC in Temecula, CA

Fair price

37 photos