Dave Sinclair Buick GMC · St Louis, MO

2026 GMC Sierra 3500 HD Denali

6 miles · truck

1 / 26 photos

PUBLISHED DEALER DETAILS

Complete vehicle specifications

Year2026

MakeGMC

ModelSierra 3500 HD

TrimDenali

VIN1GT4UWEYXTF296685

Stock numberT261421

Mileage6 miles

BodyPickup

Engine6.6L V8 turbo

Cylinders8

Displacement6.6L

TransmissionAutomatic

Drivetrain4WD

FuelDiesel

ExteriorOnyx Black

InteriorJet Black, Forge Perforated Leather Seating Surfaces

Towing20000

Vehicle description

Thank you for choosing Dave Sinclair Buick GMC This 2026 GMC Sierra 3500HD Denali, has a Onyx Black exterior and a Jet Black interior. Please call us at (314) 272-4060 and reference stock number T261421 for further details. WHY THIS VEHICLE? Preferred Equipment Group 5SASiriusXM with 360L Trial SubscriptionPower Sliding Rear Window with DefoggerPower Front Windows with Passenger Express Up/downDeep-Tinted GlassKeyless Open and StartRear Wheelhouse LinersPush Button StartRemote Vehicle Starter SystemElectric Rear-Window DefoggerFront Rain-Sensing WipersSpray-On Pickup Bedliner with GMC LogoFloor-Mounted Center ConsoleSignature Chrome Denali GrilleSafety Alert SeatWireless ChargingHeated Driver and Front Outboard Passenger SeatsHeated 2nd Row Outboard Seats120-Volt Bed Mounted Power Outlet120-Volt Instrument Panel Power OutletVentilated Driver and Front Passenger SeatsManual Tilt-Wheel/telescoping Steering Column2-Speed Active Transfer CaseSierra HD Pro SafetyWireless Phone ProjectionProGrade Trailering SystemTrailer Camera ProvisionsLED Smoked Amber Roof Marker Lamps2 Charge/data USB Ports Inside Center Console2 USB Ports2 Charge-Only Rear USB PortsUltrasonic Front and Rear Park AssistLED Cargo Area LightingRear Cross Traffic AlertUniversal Home RemoteSteering Wheel Audio ControlsTrailer Side Blind Zone AlertBose Premium 7-Speaker Sound SystemUnauthorized Entry Theft-Deterrent SystemHD Surround VisionBed View Camera with Two Trailer Camera ProvisionsPolished Exhaust TipX31 Off-Road PackageTechnology PackageAuto-Dimming Inside Rearview Mirror with CameraMulticolor 15" Diagonal Head-Up DisplayDenali Reserve Package ($1,835 value)Power SunroofSnow Plow Prep/camper Package ($530 value)220 Amp AlternatorSkid Plates Convenience Adaptive cruise control - Set it and forget it. Road trips used to be stressful. Cruise control only managed speed, but not distance or safety. Now, with adaptive cruise control, simply set your desired speed and let sensor technology maintain a safe distance between you and the vehicle ahead. Adaptive cruise control; your ultimate co-pilot.Safety and Security Forward collision mitigation - Forward thinking. You look away for just a second and suddenly the vehicle in front of you has stopped. That's when the forward collision mitigation system comes to life. When it senses an impending impact, it will activate a combination of features to help prevent or reduce the severity of an accident. Forward collision mitigation is always looking ahead. Pedestrian impact prevention - An extra step toward safety. Pedestrians don't always stop, look, and listen, but with Pedestrian Impact Prevention, your vehicle is equipped to better see them and avoid them. This system constantly monitors the road ahead to identify and track pedestrians. It projects that image to an interior display screen, AND should an impact become likely, Pedestrian impact prevention takes steps to avoid a collision. Rear camera - Watching your back! The rear camera helps you see obstacles and hazards you otherwise couldn't by showing enhanced images of what is behind you. The rear camera is an extra set of eyes that's both convenient and safe.Technology and Telematics Mobile hotspot - WiFi on the fly. Connect your devices to the Internet through your vehicles private mobile hotspot and take the internet wherever your journey takes you, without eating up your data allowance. Find the hotspot with mobile hotspot. EMISSIONS, FEDERAL REQUIREMENTS, ENGINE, DURAMAX 6.6L TURBO-DIESEL V8, B20-DIESEL COMPATIBLE, TRANSMISSION, 10-SPEED AUTOMATIC, GVWR, 12,100 LBS. (5488 KG) WITH SINGLE REAR WHEELS, REAR AXLE, 3.42 RATIO, WHEELS, 20" (50.8 CM) ULTRA-BRIGHT MACHINED WHEELS WITH BRIGHT CHROME INSERTS, ONYX BLACK, SEATS, FRONT BUCKET WITH CENTER CONSOLE, JET BLACK, FORGE PERFORATED LEATHER SEATING SURFACES, AUDIO SYSTEM, 13.4" DIAGONAL PREMIUM GMC INFOTAINMENT SYSTEM, DENALI RESERVE PACKAGE, TECHNOLOGY PACKAGE, SNOW PLOW PREP/CAMPER PACKAGE, ENGINE BLOCK HEATER,

Features & options (250)

Adaptive Cruise Control
Bluetooth®
Heated Steering Wheel
Remote Start
4WD/AWD
Android Auto
Apple CarPlay
Leather Seats
Wi-Fi Hotspot
Emergency Brake Assist
Lane Departure Warning
Sunroof/Moonroof
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
Place and receive hands-free phone calls
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
Wi-Fi Hotspot capable
May require additional optional equipment
SiriusXM with 360L Trial Subscription
SiriusXM
Wireless phone projection
For Apple CarPlay and Android Auto
Rainsense automatic wipers
Animated LED projectors headlamps with LED turn signals and Daytime Running Lamps
Outside power-adjustable vertical trailering mirrors with power folding/extending auto-dimming driver and passenger upper glass
Chrome mirror caps
AT4 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
CornerStep rear bumper
Located at each end of the rear bumper
Textured step pads to help provide secure footing
Lamps, cargo area, cab mounted integrated with center high mount stop lamp, with switch in bank on left side of steering wheel
20" LT275/65R20 all-terrain, blackwall tires
Tailgate and bed rail protection caps
Animated LED Signature Tail lamps with Stop, turn and Reverse lamps
Cargo tie-downs
12-fixed rated at 500 lbs. per corner
Single Rear Wheels
6" Chrome rectangular assist steps (factory installed)
Textured step pads help provide secure footing
Stainless-steel beltline moldings
Tailgate with EZ Lift assist, power lock & release
Hitch area lighting
LED fog lamps
18" LT275/70R18 all-terrain, blackwall spare tire
Spray-on bedliner
Includes GMC logo on all trims except PRO
Rear wheelhouse liners
Grille, Signature Chrome Denali grille
Chrome door handles
Body-color front bumper
20" Ultra-bright machined wheels with bright chrome inserts with Black painted pockets
Side Bed Step
Black textured step pads help provide secure footing
Smoked Amber LED roof marker lamps
Roof-mounted lamps near the front of the cab
Body-color rear bumper
With integrated CornerSteps
Deep-tinted glass
Provides added protection from sun and glare
GMC MultiPro Tailgate
Power lock and release
IntelliBeam
Power sliding rear window with rear defogger
Cargo bed LED lighting
Provides light to find cargo in the bed
Spare tire carrier lock
Helps keep spare tire secure
Winter Grille Cover
Power sunroof
Retracts into the roof
Offers tilt and slide features with express-open and -close
Front license plate bracket
Onyx Black
Power windows with driver express-up/down
Rear air vents
Provides cabin comfort for rear occupants
Power windows with driver and front passenger express-up/down
If obstruction is detected, the anti-pinch feature will auto-reverse
Rear window defogger
Wrapped steering wheel
Driver memory
Carpeted floor covering
Color-keyed to match the interior
Ventilated driver and front passenger seats
Individually controlled
Cooling feature includes both seatbacks and cushions
In-Vehicle Trailering App
Checklist
Trailer maintenance reminders
Trailer security alerts
Trailer mileage
Tow/haul reminder
Trailer electrical diagnostics
Front carpeted floor mats
Helps protect your interior from road debris and the elements
Denali models feature unique premium tufted carpeting
12.3" diagonal color Driver Information Center
High definition display provides crisp, premium appearance
Power windows with rear express-down
Assist handles
Front A-pillar mounted for Driver and Passenger
Rear B-pillar mounted
You can always override the feature and take control
Universal Home Remote
3-channel programmable
Theft-deterrent unauthorized entry system
Helps deter unauthorized entry, helping to protect your vehicle
Outside temperature display
Located in infotainment display
Rear carpeted floor mats
12-way power driver seat
Includes 8-way power driver seat
Includes 4-way power lumbar
Keyless Open and Start
Lockout protection helps you avoid locking keys in the vehicle
Front bucket seats
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)
USB ports
(2) Data/charge ports located inside center console
Heated rear outboard seats
Passengers can manage heat settings with their own controls
Manual tilt and telescoping steering column
Steering-wheel mounted controls
Wireless Charging
Uses induction technology for select portable electronic devices
Convenient charging location on the top of the center console
(2) First row, located on console
120-volt box-mounted power outlet
3-prong auxiliary household-style outlet
Located in the pickup bed
Dual-zone automatic climate control
Allows individual climate settings for both driver and front passenger
Seat trim, Forge Perforated Leather seating surfaces
120-volt power outlet
Located on the instrument panel
12-way power front passenger seat
Includes 8-way power front passenger seat
Includes a 4-way power lumbar control
Heated driver and front outboard passenger seats
(2) Charge ports located on rear of console
Front center console
Compass
Located in instrument cluster
Power door locks
Head-Up Display
Multi-color 15" diagonal Head-Up Display
Adjustable vertical position and brightness of the display
Rear Camera Mirror
The feature also allows brightness, vertical tilt and zoom adjustments
Jet Black, Forge Perforated Leather seating surfaces
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
Heavy-Duty Air Filter
Chrome vertical recovery hooks
Two front frame-mounted
Four wheel drive
Integrated trailer brake controller
Integrated with the antilock brake system (ABS)
Digital Variable Steering Assist
Off-Road suspension
Skid plates
Help protect the front underbody, oil pan and transfer case
Fully boxed frame
Hydroformed front section
High-strength steel
4-wheel antilock disc brakes
Brake pad wear indicator
Automatic locking rear differential
12,100 lbs. GVWR
Emissions, Federal requirements
Heavy-duty 730 cold-cranking amps battery
70 Amp-hr
Maintenance-free with rundown protection and retained accessory power
220-amp alternator
Denali Reserve Package
Technology Package
Sunroof
Denali Preferred Equipment Group includes standard equipment
AT4 Preferred Package on AT4
Snow Plow Prep / Camper Package
Power feed to accommodate a backup and roof emergency light
A single 220-amp alternator
Heavy-duty front springs
Option/package discount
3 Years OnStar One
Safety Services, Wi-Fi, and In-Vehicle Apps, all connected by OnStar
Info at OnStar.com/plans
Trailering Information Label
LED Daytime Running Lamps
Signature LED Daytime Running Lamps
Front Pedestrian Braking
Limited nighttime and low visibility performance
Front and Rear Park Assist
These can help you park and avoid collisions
Teen Driver
Seat Belt Adjustable Guide Loops
Front row only
Rear Seat Reminder
Trailer Side Blind Zone Alert
Hitch Guidance
Can help you line up the hitch to your trailer
Tire Pressure Monitoring System with Tire Fill Alert
Rear Cross Traffic Alert
Safety Alert Seat
You can also switch to beeping crash avoidance alerts
Trailering camera provisions
Includes connector for accessory wiring harness
OnStar Basics
Drive confidently with core OnStar services including
Remote commands
Built-in voice assistance
Real-time traffic and navigation
Automatic Crash Response to help if you're in need
Buckle to Drive
6 airbags
Dual-stage frontal airbags for driver and front outboard passenger
Head-curtain airbags for outboard seating positions
HD Surround Vision
Can help you park or avoid vehicles and objects
Bed View Camera
Includes 2 Trailer Camera Provisions
Hitch View

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 250 miles of St Louis, Missouri

Asking price$77,528Dealer asking price · 6 mi

Market value$83,585Market value · based on 17 comparable cars

vs. market-7.2%Not rated · prices vary widely

Where this price sits

Among the lowest-priced · 76% of 17 similar listings ask more than this car.

Market value $83,585

This car$77,528

$73,902lowest$109,869highest

Middle 50% of asking pricesMarket valueThis car

Price vs. market value

−25%Market value+25%

Not rated · comparable prices vary too widely$6,057 below the market value of $83,585

Price range

$73,902$109,869

4th lowest price of 18 similar listings within 250 milesTick marks the market value · range of 17 similar listings

AutosXchange Insights

Compared with 17 new 2026 GMC Sierra 3500 Denali listings within 250 mi.
Priced $6,057 below the market value of 17 comparable cars.
4th lowest price of 18 similar listings within 250 miles.
About 6 miles per year of age (U.S. average is roughly 12,000–14,000).
Stock # T261421 — 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 6, 2026. No price change at this dealership since Nov 6 ($77,528).

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

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 Denali · new · within 250 miles of St Louis, Missouri. Showing the 12 nearest of 17 comparable cars for sale, nearest first.

26 photos