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O'Neil GMC · Warminster, PA

2026 GMC Sierra 1500 AT4X

6 miles · truck · Price dropped $2,000

PUBLISHED DEALER DETAILS

Complete vehicle specifications

Year2026
MakeGMC
ModelSierra 1500
TrimAT4X
Stock numberT742
Mileage6 miles
BodyPickup
Engine3.0L 6-cyl turbo
Displacement3.0L
TransmissionAutomatic
Drivetrain4WD
FuelDiesel
MPG19 city / 20 hwy
ExteriorOnyx Black
InteriorObsidian Rush, Full Grain Leather Front Seat Trim
Towing8500

Vehicle description

Onyx Black 2026 GMC Sierra 1500 AT4X 4WD 10-Speed Automatic 3.0L I6 This 2026 GMC Sierra 1500 AT4X in Onyx Black 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:$2000 - GMC Bonus Cash. Exp. 11/30/2026 $6250 - Buick & GMC Consumer Cash Program. Exp. 11/30/2026 $4,000 - O'Neil GMC Discount – Available to all customers. excl. 2026 Sierra 1500 PRO Exp. 12/31/2027

Features & options (149)

  • Adaptive Cruise Control
  • Bluetooth®
  • Heated Steering Wheel
  • Remote Start
  • 4WD/AWD
  • Android Auto
  • Apple CarPlay
  • Keyless Entry
  • Leather Seats
  • Wi-Fi Hotspot
  • Emergency Brake Assist
  • Lane Departure Warning
  • Lane Keep Assist
  • 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
  • Trailering Package includes trailer hitch, 7-pin and 4-pin connectors and (CTT) Hitch Guidance
  • Rear axle, 3.23 ratio
  • Pickup bed
  • Push Button Start
  • Air filter, heavy-duty
  • Electronic Precision Shift and steering column paddle shifters
  • Automatic Stop/Start
  • Hill Descent Control
  • Differential, driver-selectable full-locking front, e-locking
  • Differential, driver-selectable full-locking rear, e-locking
  • Transfer case, two-speed, electronic Autotrac with push button control (4WD models only) (Includes Terrain mode.)
  • Suspension, Off Road with 2" factory installed lift and Multimatic DSSV dampers (Not available with 22" LPO wheels and tires.)
  • Four wheel drive
  • Frame, fully-boxed, hydroformed front section
  • Trailer brake controller, integrated
  • Skid Plates
  • Cargo tie downs (12), fixed
  • Steering, Electric Power Steering (EPS) assist, rack-and-pinion
  • Brakes, 4-wheel antilock, 4-wheel disc with DURALIFE rotors
  • Brake lining wear indicator
  • Capless Fuel Fill
  • Exhaust, aluminized stainless-steel muffler and tailpipe
  • Wheels, 18" x 8.5" (45.7 cm x 21.6 cm) Painted aluminum with dark painted pockets
  • Tires, LT275/70R18 blackwall Goodyear Wrangler Territory MT
  • Tire, spare LT275/70R18 blackwall Goodyear Wrangler Territory MT
  • Wheels, 18" x 8.5" (45.7 cm x 21.6 cm) Gloss Black painted full-size, spare Aluminum
  • Wheelhouse liners, rear
  • Tire carrier lock keyed cylinder lock that utilizes same key as ignition and door
  • Sunroof, power
  • Front Bumper, AEV Stamped-steel high approach Front Bumper with heavy duty cast recovery points
  • Bumper, rear body-color with corner steps (Not available with (ULV) AT4X AEV Edition. Bumper color is High Gloss Black on AT4X.)
  • CornerStep, rear bumper (Not included with (ULV) AT4X AEV Edition.)
  • Grille (Gloss Black header with Dark Nickel grille insert bars with gloss black accents.)
  • Headlamps, LED projectors with Fade-on/Fade-off animation, LED turn signals and Daytime Running Lamps
  • IntelliBeam, automatic high beam on/off (Included and only available with (PDI) GMC Pro Safety.)
  • Fog lamps, LED
  • Lighting, perimeter
  • Taillamps, LED LED signature taillight with LED stop, turn & reverse and Fade-on/Fade-off animation
  • Mirrors, outside heated power-adjustable, power-folding and driver-side auto-dimming puddle lamps, side perimeter lighting and memory
  • Mirror caps, high gloss Black
  • Wipers, front rain-sensing
  • Window, power, rear sliding with rear defogger
  • Glass, deep-tinted
  • 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
  • Tailgate, GMC MultiPro Tailgate with six functional load/access features
  • Tailgate, gate function manual with EZ Lift includes power lock and release, includes hitch area light
  • Tailgate and bed rail protection caps, top
  • Door handles, body-color (Gloss Black with (ULV) AT4X AEV Edition.)
  • LPO, MultiPro Tailgate Audio System by Kicker (dealer-installed)
  • SiriusXM Trial Subscription
  • Bose Premium Series with 12-speaker system with CenterPoint, Richbass woofer and AudioPilot
  • Bluetooth for phone, connectivity to vehicle infotainment system
  • Wireless, Apple CarPlay / Wireless Android Auto
  • Steering wheel audio controls
  • Wi-Fi Hotspot capable (Terms and limitations apply. See onstar.com or dealer for details.)
  • Seats, front bucket with center console
  • Seat trim, Full grain leather front
  • Seat adjuster, driver 16-way power including lumbar and massage
  • Seat adjuster, passenger 16-way power including lumbar and massage
  • Seating, heated driver and front outboard passenger
  • Driver memory recalls driver "presets" for power driver seat and outside mirrors
  • Seats, ventilated driver and front passenger
  • Seats, heated second row outboard seats
  • Center Console, floor-mounted with cup holders, cell phone storage, power cord management, hanging file folder capability
  • Floor covering, color-keyed carpeting
  • Premium Floor Liners with removable carpet insert, front (Deleted with (ULV) AT4X AEV Edition.)
  • Premium Floor Liners with removable carpet insert, rear (Deleted with (ULV) AT4X AEV Edition.)
  • Steering column, power rake and telescoping
  • Steering wheel, leather-wrapped
  • Steering wheel, heated
  • Driver Information Center, enhanced, 12.3" diagonal reconfigurable multicolor digital display
  • GMC Premium information Display- 13.4" diagonal Multicolor touch screen
  • Compass, located in instrument cluster
  • Exterior Temperature Display, located in radio display
  • Multicolor 15" Diagonal Head-Up Display
  • Windows, power front, drivers express up/down
  • Window, power front, passenger express up/down
  • Windows, power rear, express down
  • Door locks, power
  • Keyless Open and Start includes remote keyless entry
  • Remote vehicle starter system
  • Universal Home Remote
  • Theft-deterrent system, unauthorized entry
  • Steering column lock, electrical
  • Wireless Charging
  • USB Ports, 2 (first row) located on console
  • USB Ports, 2, Charge/Data ports located inside center console
  • Power outlet, interior power outlet, 120-volt (400 watts shared with (KC9) bed mounted power outlet)
  • USB ports, (2) charge-only, rear
  • Power outlet, bed mounted, 120-volt (400 watts shared with (KI4) interior power outlet)
  • Air conditioning, dual-zone automatic climate control
  • Air vents, rear
  • Defogger, rear-window electric
  • Rear Camera Mirror, inside rearview auto-dimming with full camera display
  • Assist handles front A-pillar mounted for driver and passenger, rear B-pillar mounted
  • Automatic Emergency Braking (Included and only available with (PDI) GMC Pro Safety.)
  • Front Pedestrian Braking (Included and only available with (PDI) GMC Pro Safety.)
  • Daytime Running Lamps, LED signature lighting
  • OnStar services capable (See onstar.com for details and limitations. Services vary by model. Service plan required.)
  • Hitch View with image adjustment, Pan/Zoom/Tilt
  • Hitch Guidance
  • Trailer Camera Provisions and trailer viewing software
  • Front and Rear Park Assist, ultrasonic
  • Following Distance Indicator (Included and only available with (PDI) GMC Pro Safety.)
  • Forward Collision Alert (Included and only available with (PDI) GMC Pro Safety.)
  • Lane Keep Assist with Lane Departure Warning (Included and only available with (PDI) GMC Pro Safety.)
  • Trailer Side Blind Zone Alert
  • Rear Cross Traffic Braking
  • Rear Pedestrian Alert
  • Safety Alert Seat (Included and only available with (PDI) GMC Pro Safety.)
  • Seat Belt Adjustable Guide Loops, front row only
  • Tire Pressure Monitoring System, auto learn includes Tire Fill Alert (does not apply to spare tire)
  • Rear Seat Reminder
  • Rear Seat Belt Indicator
  • DriveType: Four Wheel Drive
  • City: 19 MPG
  • Hwy: 20 MPG
  • Combined: 19 MPG
  • Fuel System: Direct Injection
  • Fuel Tank Capacity: 24 gal
  • Fuel Type: Diesel Fuel
  • Horse Power: 305
  • Rear Wheel: Single
  • Trailering Capacity: 8500 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$72,325Dealer asking price · 6 mi
Market value$75,161Market value · based on 12 comparable cars
vs. market Fair price-3.8%Fair price · based on 12 comparable cars

Where this price sits

Among the lowest-priced · 83% of 12 similar listings ask more than this car.

$71,219lowest$80,273highest
Middle 50% of asking pricesMarket valueThis car

Price vs. market value

-3.8%
−25%Market value+25%
Fair price$2,836 below the market value of $75,161

Price range

$72,325
$71,219$80,273
3rd lowest price of 13 similar listings within 50 milesTick marks the market value · range of 12 similar listings

AutosXchange Insights

  • Compared with 12 new 2026 GMC Sierra 1500 AT4X listings within 50 mi.
  • Priced $2,836 below the market value of 12 comparable cars.
  • 3rd lowest price of 13 similar listings within 50 miles.
  • About 6 miles per year of age (U.S. average is roughly 12,000–14,000).
  • Stock # T742 — 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. 2 price changes at this dealership: $74,485 → $72,325 (−$2,160).

$71k$72k$73k$74k$75kNov 5Nov 7Nov 8Nov 10Nov 12Nov 13−$160 Nov 6−$2,000 Nov 12

Market activity: O'Neil GMC cut prices on 47 GMC Sierra 1500 by an average of $2,003

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 13); 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 1500 AT4X · new · within 50 miles of Warminster, Pennsylvania. All 12 comparable cars for sale, nearest first.

More GMC Sierra 1500 near Warminster

All years and trims. Nearest first.