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O'Neil GMC · Warminster, PA

2026 GMC Sierra 2500 HD Denali

12 miles · truck

PUBLISHED DEALER DETAILS

Complete vehicle specifications

Year2026
MakeGMC
ModelSierra 2500 HD
TrimDenali
Stock numberT658
Mileage12 miles
BodyPickup
Engine6.6L V8 turbo
Cylinders8
Displacement6.6L
TransmissionAutomatic
Drivetrain4WD
FuelDiesel
ExteriorSterling Metallic
InteriorJet Black, Forge Perforated Leather Seat Trim
Towing18500

Vehicle description

New Price! Sterling Metallic 2026 GMC Sierra 2500HD Denali 4WD 10-Speed Automatic Duramax 6.6L V8 TurbodieselThis 2026 GMC Sierra 2500HD Denali in Sterling Metallic features:O'Neil GMC in Warminster serving Philadelphia since 1965. See the rest of our inventory at ONEILGMC.COM. Price excludes tax, tags, title, license, and dealer fees, additional rebates may apply, but internet price does include the following rebates:$1500 - Buick & GMC Consumer Cash Program. Exp. 11/30/2026 $4000 - GMC Bonus Cash. Exp. 11/30/2026 $5,000 - O'Neil GMC Discount – Available to all customers. Exp. 12/30/2026

Features & options (140)

  • Adaptive Cruise Control
  • Bluetooth®
  • Heated Steering Wheel
  • Remote Start
  • 4WD/AWD
  • Android Auto
  • Apple CarPlay
  • Leather Seats
  • Wi-Fi Hotspot
  • Auto Dimming Mirror
  • 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
  • X31 Off-Road Package includes (JHD) Hill Descent Control, (NZZ) skid plates, Off-Road suspension and Twin-tube Rancho shocks
  • Trailering Package includes trailer hitch, 7-pin and 4-pin connectors and (CTT) Hitch Guidance
  • ProGrade Trailering System includes (PZ8) Hitch Guidance with Hitch View and (UET) In-vehicle Trailering App
  • Pickup bed includes bed assist step
  • Push Button Start
  • Hill Descent Control
  • Transfer case, two-speed active, electronic Autotrac with push button control
  • Auto-locking rear differential
  • Four wheel drive
  • Air filter, heavy-duty
  • Air filtration monitoring
  • Trailer brake controller, integrated
  • Recovery hooks, front, Chrome (plant installed.)
  • Skid Plates protect the oil pan, front axle and transfer case
  • Frame, fully-boxed, hydroformed front section and a fully-boxed stamped rear section
  • Suspension, Off-Road includes twin-tube shocks
  • Brakes, 4-wheel antilock, 4-wheel disc with DURALIFE rotors
  • Brake lining wear indicator
  • Wheels, 20" (50.8 cm) Ultra-bright machined wheels with Black painted pockets
  • Tires, LT275/65R20 all-terrain, blackwall
  • Tire, spare LT275/70R18 all-terrain, blackwall
  • Tire carrier lock keyed cylinder lock that utilizes same key as ignition and door
  • Bumper, front, body-color lower
  • Bumper, rear body-color with bumper CornerSteps
  • Assist steps, chromed tubular, 6" rectangular cab length (factory installed)
  • Bed Step, Black integrated on forward portion of bed on driver and passenger side
  • CornerStep, rear bumper
  • Cargo tie downs (12), fixed, rated at 500 lbs per corner
  • Wheelhouse liners, rear
  • Moldings, beltline, chrome
  • Grille (Signature Chrome Denali grille.)
  • Headlamps, Animated LED projectors LED turn signals and Daytime Running Lamps
  • IntelliBeam, automatic high beam on/off (Included and only available with (PDI) Sierra HD Pro Safety.)
  • Fog lamps, LED
  • Lamps, cargo area cab mounted integrated with center high mount stop lamp, with switch in bank on left side of steering wheel
  • LED Cargo Area Lighting located in cargo bed activated with switch on center switch bank or key fob
  • Taillamps, Animated LED Signature Tail, Stop, turn and Reverse lamps
  • Lamps, Smoked Amber roof marker, (LED) (Not available with (YF5) California state emissions requirements.)
  • Mirror caps, chrome
  • Glass, deep-tinted
  • Wipers, front rain-sensing
  • Door handles, chrome
  • Tailgate, gate function manual with EZ Lift includes power lock and release, includes hitch area light
  • Tailgate and bed rail protection caps, top
  • SiriusXM Trial Subscription
  • Bose Sound System, premium 7-speaker system with Richbass woofer
  • Bluetooth for phone connectivity to vehicle infotainment system
  • Wireless phone projection for Apple CarPlay and Android Auto
  • Wi-Fi Hotspot capable (Terms and limitations apply. See onstar.com or dealer for details.)
  • Seats, front bucket with center console
  • Seat trim, Forge Perforated Leather
  • Seat adjuster, driver 12-way power including lumbar
  • Seat adjuster, passenger 12-way power including lumbar
  • Seating, heated driver and front outboard passenger
  • Seats, ventilated driver and front passenger
  • Seats, heated second row outboard seats
  • Driver memory recalls driver "presets" for power driver seat and outside mirrors
  • Center Console, floor-mounted with cup holders, cell phone storage, power cord management, hanging file folder capability
  • Floor covering, color-keyed carpeting
  • Floor mats, carpeted front (Unique premium carpet. Deleted when LPO floor liners are ordered or (BKF) Premium Floor Liners are ordered.)
  • Floor mats, carpeted rear (Unique premium carpet. Deleted when LPO floor liners are ordered or (BKF) Premium Floor Liners are ordered.)
  • Steering wheel, wrapped
  • Steering wheel, heated
  • Steering wheel audio controls
  • Steering column, manual Tilt-Wheel and telescoping
  • Driver Information Center, enhanced, 12.3" diagonal reconfigurable multicolor digital display
  • Rear Seat Reminder
  • GMC Premium information Display- 13.4" diagonal Multicolor touch screen
  • Exterior Temperature Display, located in radio display
  • Compass, located in instrument cluster
  • Windows, power front, drivers express up/down
  • Window, power front, passenger express up/down
  • Windows, power rear, express down
  • Window, power, rear sliding with rear defogger
  • Door locks, power
  • Keyless Open and Start includes remote keyless entry
  • Remote vehicle starter system
  • Universal Home Remote
  • Wireless Charging
  • Theft-deterrent system, unauthorized entry
  • Power outlet, instrument panel, 120-volt (400 watts shared with (KC9) bed mounted power outlet)
  • USB Ports, 2 (first row) located on console
  • USB Ports, 2, Charge/Data ports located inside center console
  • USB ports, (2) charge-only, rear
  • Power outlet, bed mounted, 120-volt (400 watts shared with (KI4) instrument panel mounted power outlet)
  • Air vents, rear
  • Air conditioning, dual-zone automatic climate control
  • Defogger, rear-window electric
  • Mirror, inside rearview auto-dimming
  • Assist handles front A-pillar mounted for driver and passenger, rear B-pillar mounted
  • Front Pedestrian Braking (Included and only available with (PDI) Sierra HD Pro Safety.)
  • Automatic Emergency Braking (Included and only available with (PDI) Sierra HD Pro Safety.)
  • Daytime Running Lamps, LED signature lighting
  • LED Signature DRL's
  • OnStar Services capable (See onstar.com for details and limitations. Services vary by model. Service plan required.)
  • Front and Rear Park Assist, ultrasonic
  • Trailer Camera Provisions and trailer viewing software
  • Hitch Guidance dynamic single line to aid in truck trailer alignment for hitching
  • Hitch Guidance with Hitch View with image adjustment, Pan/Zoom/Tilt
  • Forward Collision Alert (Included and only available with (PDI) Sierra HD Pro Safety.)
  • Following Distance Indicator (Included and only available with (PDI) Sierra HD Pro Safety.)
  • Lane Departure Warning (Included and only available with (PDI) Sierra HD Pro Safety.)
  • Rear Seat Belt Indicator
  • Rear Cross Traffic Alert
  • Trailer Side Blind Zone Alert
  • Seat Belt Adjustable Guide Loops, front row only
  • Safety Alert Seat
  • Tire Pressure Monitoring System, auto learn includes Tire Fill Alert (does not apply to spare tire)
  • Trailering Information Label provides max trailer ratings for tongue weight, conventional, gooseneck and 5th wheel trailering
  • DriveType: Four Wheel Drive
  • Fuel System: Direct Injection
  • Fuel Tank Capacity: 36 gal
  • Fuel Type: Diesel Fuel
  • Horse Power: 470
  • Rear Wheel: Single
  • Trailering Capacity: 18500 lbs

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 Warminster, Pennsylvania
Asking price$81,955Dealer asking price · 12 mi
Market value$84,822Market value · based on 40 comparable cars
vs. market Fair price-3.4%Fair price · based on 40 comparable cars

Where this price sits

In the typical middle range · 73% of 40 similar listings ask more than this car.

$75,559lowest$88,764highest
Middle 50% of asking pricesMarket valueThis car

Price vs. market value

-3.4%
−25%Market value+25%
Fair price$2,867 below the market value of $84,822

Price range

$81,955
$75,559$88,764
11th lowest price of 41 similar listings within 50 milesTick marks the market value · range of 40 similar listings

AutosXchange Insights

  • Compared with 40 new 2026 GMC Sierra 2500 Denali listings within 50 mi.
  • Priced $2,867 below the market value of 40 comparable cars.
  • 11th lowest price of 41 similar listings within 50 miles.
  • About 12 miles per year of age (U.S. average is roughly 12,000–14,000).
  • Stock # T658 — 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 5, 2026. No price change at this dealership since Nov 5 ($81,955).

$81.7k$81.8k$81.9k$82.0k$82.1k$82.2kNov 5Nov 6Nov 8Nov 9Nov 10Nov 12

Market activity: O'Neil GMC raised prices on 3 2026 GMC Sierra 2500 HD AT4 by $490 each

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

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 Denali · new · within 50 miles of Warminster, Pennsylvania. Showing the 12 nearest of 40 comparable cars for sale, nearest first.

2026 GMC Sierra 2500 HD Denali vehicle photo2026 GMC Sierra 2500 HD Denali6 miles · O'Neil GMC · Warminster, PA · 0 mi away$79,050$2,905 less than this car2026 GMC Sierra 2500 HD Denali vehicle photo2026 GMC Sierra 2500 HD Denali76 miles · O'Neil GMC · Warminster, PA · 0 mi away$82,500$545 more than this car2026 GMC Sierra 2500 HD Denali vehicle photo2026 GMC Sierra 2500 HD Denali14 miles · Faulkner Buick GMC Trevose · Trevose, PA · 7 mi away$80,755$1,200 less than this car2026 GMC Sierra 2500 HD Denali vehicle photo2026 GMC Sierra 2500 HD Denali10 miles · Fred Beans GMC of Doylestown · Doylestown, PA · 10 mi away$79,105$2,850 less than this car2026 GMC Sierra 2500 HD Denali vehicle photo2026 GMC Sierra 2500 HD Denali12 miles · Fred Beans GMC of Doylestown · Doylestown, PA · 10 mi away$80,495$1,460 less than this car2026 GMC Sierra 2500 HD Denali vehicle photo2026 GMC Sierra 2500 HD Denali12 miles · Fred Beans GMC of Doylestown · Doylestown, PA · 10 mi away$80,760$1,195 less than this car2026 GMC Sierra 2500 HD Denali vehicle photo2026 GMC Sierra 2500 HD Denali9 miles · Fred Beans GMC of Doylestown · Doylestown, PA · 10 mi away$81,035$920 less than this car2026 GMC Sierra 2500 HD Denali vehicle photo2026 GMC Sierra 2500 HD Denali11 miles · Burns Buick GMC · Marlton, NJ · 27 mi away$82,900$945 more than this car2026 GMC Sierra 2500 HD Denali vehicle photo2026 GMC Sierra 2500 HD Denali1 miles · Burns Buick GMC · Marlton, NJ · 27 mi away$83,031$1,076 more than this car2026 GMC Sierra 2500 HD Denali vehicle photo2026 GMC Sierra 2500 HD Denali5 miles · Burns Buick GMC · Marlton, NJ · 27 mi away$83,031$1,076 more than this car2026 GMC Sierra 2500 HD Denali vehicle photo2026 GMC Sierra 2500 HD Denali56 miles · Burns Buick GMC · Marlton, NJ · 27 mi away$87,909$5,954 more than this car2026 GMC Sierra 2500 HD Denali vehicle photo2026 GMC Sierra 2500 HD Denali8 miles · Burns Buick GMC · Marlton, NJ · 27 mi away$88,764$6,809 more than this car

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