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O'Meara GMC · Thornton, CO

2026 GMC Sierra 3500 HD AT4

10 miles · truck · Price dropped $2,500

PUBLISHED DEALER DETAILS

Complete vehicle specifications

Year2026
MakeGMC
ModelSierra 3500 HD
TrimAT4
VIN
Stock numberTF417506
Mileage10 miles
BodyPickup
Engine6.6L V8 turbo
Cylinders8
Displacement6.6L
TransmissionAutomatic
Drivetrain4WD
FuelDiesel
ExteriorVolcanic Red Tintcoat
InteriorJet Black with Kalahari accents, Perforated Front
Doors4

Vehicle description

Heated/Cooled Leather Seats, NAV, Heated Rear Seat, 4x4, Alloy Wheels, Bed Liner, Tow Hitch, AUDIO SYSTEM, 13.4" DIAGONAL PREMIUM GMC INFOTAINMENT SYSTEM. Volcanic Red Tintcoat exterior and Jet Black with Kalahari accents interior, AT4 trim KEY FEATURES INCLUDE Leather Seats, 4x4, Heated Driver Seat, Heated Rear Seat, Cooled Driver Seat, Premium Sound System, Satellite Radio, Onboard Communications System, Aluminum Wheels, Remote Engine Start Privacy Glass, Keyless Entry, Steering Wheel Controls, Alarm. GMC AT4 with Volcanic Red Tintcoat exterior and Jet Black with Kalahari accents interior features a 8 Cylinder Engine with 470 HP at 2800 RPM*. OPTION PACKAGES ENGINE, DURAMAX 6.6L TURBO-DIESEL V8, B20-DIESEL COMPATIBLE (470 hp [350.5 kW] @ 2800 rpm, 975 lb-ft of torque [1322 Nm] @ 1600 rpm) (Includes (K05) engine block heater.), TECHNOLOGY PACKAGE includes (DRZ) Rear Camera Mirror and (UV6) Multicolor 15" Diagonal Head-Up Display, LPO, OFF-ROAD HIGH CLEARANCE STEP (dealer-installed), GOOSENECK / 5TH WHEEL PREP PACKAGE -- Hitch platform to accept Gooseneck or 5th Wheel hitch. Includes hitch platform with tray to accept ball, stamped bed holes with removable caps installed and bed mounted 7-pin trailer harness (similar to UY2 harness). AT4 PREFERRED PACKAGE includes (UG1) Universal Home Remote, (A48) rear sliding power window and (U01) Roof Marker Lamps, 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), TRANSMISSION, 10-SPEED AUTOMATIC.

Features & options (141)

  • Basic
  • Corrosion
  • Maintenance
  • Roadside Assistance
  • Max seating capacity
  • Fuel System
  • Fuel tank capacity
  • Horsepower
  • Towing capacity
  • 13.4" diagonal GMC Premium Infotainment System with Google built-in
  • Bluetooth
  • Bose Premium Sound System
  • SiriusXM with 360L Trial Subscription
  • Wi-Fi Hotspot capable
  • Wireless phone projection
  • 18" LT275/70R18 all-terrain, blackwall spare tire
  • 20" LT275/65R20 all-terrain, blackwall tires
  • 20" high gloss Black aluminum wheels
  • Animated LED Signature Tail lamps with Stop, turn and Reverse lamps
  • Animated LED projectors headlamps with LED turn signals and Daytime Running Lamps
  • Black beltline moldings
  • Body-color door handles
  • Body-color front bumper
  • Body-color rear bumper
  • Cargo bed LED lighting
  • Cargo tie-downs
  • CornerStep rear bumper
  • Deep-tinted glass
  • Front license plate bracket
  • GMC MultiPro Tailgate
  • High gloss Black mirror caps
  • IntelliBeam
  • LED fog lamps
  • Off-Road High Clearance Steps
  • Outside power-adjustable vertical trailering mirrors with power folding/extending auto-dimming driver and passenger upper glass
  • Power sliding rear window with rear defogger
  • Power sunroof
  • Rainsense automatic wipers
  • Rear wheelhouse liners
  • Side Bed Step
  • Smoked Amber LED roof marker lamps
  • Spare tire carrier lock
  • Spray-on bedliner
  • Tailgate and bed rail protection caps
  • Tailgate with EZ Lift assist, power lock & release
  • Winter Grille Cover
  • 10-way power driver seat with power lumbar
  • 10-way power front passenger seat
  • 12.3" diagonal color Driver Information Center
  • 120-volt box-mounted power outlet
  • 120-volt power outlet
  • Adaptive Cruise Control
  • Assist handles
  • Carpeted floor covering
  • Compass
  • Driver memory
  • Dual-zone automatic climate control
  • Front bucket seats
  • Front center console
  • Head-Up Display
  • Heated driver and front outboard passenger seats
  • Heated rear outboard seats
  • Heated steering wheel
  • In-Vehicle Trailering App
  • Keyless Open and Start
  • Manual tilt and telescoping steering column
  • Outside temperature display
  • Power door locks
  • Power windows with driver and front passenger express-up/down
  • Power windows with driver express-up/down
  • Power windows with rear express-down
  • Premium front floor liners with removable carpet insert
  • Premium rear floor liners with removable carpet insert
  • Rear Camera Mirror
  • Rear air vents
  • Rear window defogger
  • Remote Start
  • Steering-wheel mounted controls
  • Theft-deterrent unauthorized entry system
  • USB ports
  • Universal Home Remote
  • Up-level rear seat with storage package
  • Ventilated driver and front passenger seats
  • Wireless Charging
  • Wrapped steering wheel
  • 10-speed automatic transmission
  • 12,100 lbs. GVWR
  • 220-amp alternator
  • 3.42 rear axle ratio
  • 4-wheel antilock disc brakes
  • 6.6L Duramax Turbo-Diesel V8 engine
  • Air filtration monitoring
  • Automatic locking rear differential
  • Autotrac 2-speed transfer case with push button controls
  • Brake pad wear indicator
  • Capped fuel fill
  • Diesel exhaust brake
  • Digital Variable Steering Assist
  • Engine block heater
  • External auxiliary transmission oil cooler
  • External engine oil cooler
  • Fully boxed frame
  • Gooseneck / 5th Wheel Prep Package
  • Heavy-Duty Air Filter
  • Heavy-duty 730 cold-cranking amps battery
  • High idle switch
  • Integrated trailer brake controller
  • Off-Road suspension
  • Red vertical recovery hooks
  • Skid plates
  • Trailering Information Label
  • LED Daytime Running Lamps
  • Signature LED Daytime Running Lamps
  • 6 airbags
  • Bed View Camera
  • Buckle to Drive
  • Following Distance Indicator
  • Forward Collision Alert
  • Front Pedestrian Braking
  • Front and Rear Park Assist
  • HD Surround Vision
  • Hitch Guidance
  • Hitch View
  • Lane Departure Warning
  • OnStar Basics
  • OnStar services capable
  • Rear Cross Traffic Alert
  • Rear Seat Belt Indicator
  • Rear Seat Reminder
  • Safety Alert Seat
  • Seat Belt Adjustable Guide Loops
  • Teen Driver
  • Tire Pressure Monitoring System with Tire Fill Alert
  • Trailer Side Blind Zone Alert
  • Trailering camera provisions
  • Automatic Emergency Braking
  • Hill Descent Control
  • StabiliTrak, electronic stability control system with traction control
  • AT4 Preferred Package
  • AT4 Premium Plus Package
  • Technology Package

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 Thornton, Colorado
Asking price$85,209Dealer asking price · 10 mi
Market value$86,499Market value · based on 5 comparable cars
vs. market Fair price-1.5%Fair price · based on 5 comparable cars

Where this price sits

In the typical middle range · 60% of 5 similar listings ask more than this car.

$85,059lowest$95,640highest
Middle 50% of asking pricesMarket valueThis car

Price vs. market value

-1.5%
−25%Market value+25%
Fair price$1,290 below the market value of $86,499

Price range

$85,209
$85,059$95,640
3rd lowest price of 6 similar listings within 50 milesTick marks the market value · range of 5 similar listings

AutosXchange Insights

  • Compared with 5 new 2026 GMC Sierra 3500 AT4 listings within 50 mi.
  • Priced $1,290 below the market value of 5 comparable cars.
  • 3rd lowest price of 6 similar listings within 50 miles.
  • About 10 miles per year of age (U.S. average is roughly 12,000–14,000).
  • Stock # TF417506 — 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 9, 2026. 1 price change at this dealership: $87,709 → $85,209 (−$2,500).

$84k$85k$86k$87k$88k$89kNov 9Nov 10Nov 11Nov 12Nov 12−$2,500 Nov 11

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

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 3500 AT4 · new · within 50 miles of Thornton, Colorado. All 5 comparable cars for sale, nearest first.

AutosXchange Intel uses current dealer-advertised asking prices, not completed sales or appraisals. It compares the same trim and condition (new or used) where at least three are listed nationwide, and adjusts the expected price for mileage; it is not adjusted for options, condition or accident history. Similar listings are searched within 50, 100 and 250 miles of the dealer first, then the dealer's state, then nationwide. The left gauge spans ±25% of the expected price. How AutosXchange price analysis works

More GMC Sierra 3500 near Thornton

All years and trims. Nearest first.

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