New 2026 GMC Sierra 2500HD AT4
- VIN: 1GT4UPEY9TF288938
- Stock: B261884
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Details
New 2026 GMC Sierra 2500HD AT4
VIN: 1GT4UPEY9TF288938STOCK: B261884Basic Info
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Exterior:Silver
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Drivetrain:4WD
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Interior:Jet Black With Kalahari Accents
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Transmission:10-Speed Automatic
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Engine:Duramax 6.6L V8 Turbodiesel
Key Features
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AWD
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Adaptive Cruise Control
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Android Auto
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Apple CarPlay
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Automatic Climate Control
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Backup Camera
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Blind Spot Monitor
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Bluetooth
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Fog Lights
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Forward Collision Warning
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Heated Seats
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Keyless Entry
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Lane Departure Warning
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Leather Seats
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Memory Seats
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Navigation System
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Parking Sensors / Assist
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Power Seats
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Premium Audio
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Premium Plus Package
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Push Start
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Rain Sensing Wipers
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Satellite Radio Ready
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Side-Impact Air Bags
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Sunroof / Moonroof
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Technology Package
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Tow Package
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WiFi Hotspot
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Wireless Phone Charging
Description
Serving Central Texas and beyond since 1909. Come experience the Covert Commitment today!
2026 GMC Sierra 2500HD AT4
$9,000 off MSRP!
10-Speed Automatic, 4WD, Jet Black With Kalahari Accents Leather.
You've done your research, so stop by Covert Buick GMC at 11750 Research Blvd Suite D, Austin, TX 78759 soon to take a test drive of this great vehicle! *Purchase price ONLY. Please call and verify the details and availability of the vehicle. Price includes rebates, incentives, and dealer discounts. Tax, title, license & dealer fees are not included. May not be available with special finance, lease or APR offers. See Dealer for full details and disclosures. Price includes: $1000 - Purchase Allowance. Exp. 06/30/2026
2026 GMC Sierra 2500HD AT4
$9,000 off MSRP!
10-Speed Automatic, 4WD, Jet Black With Kalahari Accents Leather.
You've done your research, so stop by Covert Buick GMC at 11750 Research Blvd Suite D, Austin, TX 78759 soon to take a test drive of this great vehicle! *Purchase price ONLY. Please call and verify the details and availability of the vehicle. Price includes rebates, incentives, and dealer discounts. Tax, title, license & dealer fees are not included. May not be available with special finance, lease or APR offers. See Dealer for full details and disclosures. Price includes: $1000 - Purchase Allowance. Exp. 06/30/2026
Vehicle Details
Exterior
- 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
- 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, Black
- Grille (Gloss Black header and grille insert bars with Black Chrome accents.)
- 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
- Mirrors, outside power-adjustable vertical trailering with heated and auto-dimming upper glass, (driver and passenger), lower convex mirrors, turn signal indicators, puddle lamps, (U12) perimeter lighting, auxiliary lighting, power folding/extending (extends 3.31" [84.25mm]) lighting
- Mirror caps, high gloss Black
- Glass, deep-tinted
- Wipers, front rain-sensing
- Door handles, body-color
- Tailgate, GMC MultiPro Tailgate with six functional load/access features NOTE: Auto release can be disabled if ball hitch is installed. See Owner's manual for details
- Tailgate, gate function manual with EZ Lift includes power lock and release, includes hitch area light
- Tailgate and bed rail protection caps, top
Interior
- Seat, Up-level Rear with Storage Package 60/40 folding bench, includes full-length bench seat, seatback storage on left and right side, center fold out armrest with 2 cupholders, full cab width under-seat storage, (includes child seat top tether anchor)
- Seat adjuster, driver 10-way power including lumbar
- Seat adjuster, passenger 10-way power including lumbar
- 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
- 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
- Remote vehicle starter system
- Adaptive Cruise Control
- Wireless Charging
- Power outlet, instrument panel, 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) instrument panel mounted power outlet)
- Air vents, rear
- Air conditioning, dual-zone automatic climate control
- Assist handles front A-pillar mounted for driver and passenger, rear B-pillar mounted
Mechanical
- Rear axle, 3.73 ratio (Requires (L8T) 6.6L V8 gas engine.)
- GVWR, 10,850 lbs. (4921 kg) (Included and only available with TK20743 model and (L8T) 6.6L V8 gas engine with 18", 20" or 22" wheels.)
- Hill Descent Control
- Transfer case, two-speed active, electronic Autotrac with push button control
- Auto-locking rear differential
- Four wheel drive
- Cooling, external engine oil cooler
- Cooling, auxiliary external transmission oil cooler
- Air filter, heavy-duty
- Air filtration monitoring
- Battery, heavy-duty 720 cold-cranking amps/80 Amp-hr maintenance-free with rundown protection and retained accessory power (Included and only available with (L8T) 6.6L V8 gas engine.)
- Alternator, 170 amps (Requires (L8T) 6.6L V8 gas engine.)
- Trailer brake controller, integrated
- In-Vehicle Trailering App, System includes checklist, trailer maintenance reminders, trailer security alerts, trailer mileage, tow/haul reminder, trailer electrical diagnostics and Trailer Tire Pressure Monitor System module (Includes trailer tire pressure monitoring alert when (PTT) trailer tire pressure monitor sensors are installed.)
- Recovery hooks, Red
- 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
- Steering, Digital Variable Steering Assist this system automatically adjusts steering based on speed, road conditions, and other inputs to reduce driver effort and fatigue
- Brakes, 4-wheel antilock, 4-wheel disc with DURALIFE rotors
- Brake lining wear indicator
- Capless Fuel Fill (Requires (L8T) 6.6L gas V8 engine.)
Safety
- StabiliTrak, stability control system with Proactive Roll Avoidance and traction control, includes electronic trailer sway control and hill start assist
- Airbags, Dual-stage frontal airbags for driver and front outboard passenger; Seat-mounted side-impact airbags for driver and front outboard passenger; Head-curtain airbags for front and rear outboard seating positions; Includes front outboard Passenger Sensing System for frontal outboard passenger airbag (Always use seat belts and child restraints. Children are safer when properly secured in a rear seat in the appropriate child restraint. See the Owner's Manual for more information.)
- Front and Rear Park Assist, ultrasonic
- Bed View Camera, camera in the CHMSL to show a view of the cargo bed display located in infotainment screen, includes Two Trailer Camera Provisions
- Trailer Camera Provisions and trailer viewing software
- Hitch Guidance dynamic single line to aid in truck trailer alignment for hitching
- Following Distance Indicator (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
- Buckle to Drive prevents vehicle from being shifted out of Park until driver seat belt is fastened; times out after 20 seconds and encourages seat belt use (Included and only available with (PDI) Sierra HD Pro Safety.)
- Safety Alert Seat
- Teen Driver a configurable feature that lets you activate customizable vehicle settings associated with a key fob, to help encourage safe driving behavior. It can limit certain available vehicle features, and it prevents certain safety systems from being turned off. An in-vehicle report card gives you information on driving habits and helps you to continue to coach your new driver
- Trailering Information Label provides max trailer ratings for tongue weight, conventional, gooseneck and 5th wheel trailering
Tech Specs
- Vehicle Name: GMC Sierra 2500HD
- Body Style: Crew Cab Pickup
- Body Code: E63
- Drivetrain: Four Wheel Drive
- Passenger Capacity: 5
- Gross Axle Wt Rating - Front: 5600
- Gross Axle Wt Rating - Rear: - TBD -
- Curb Weight - Front: 4013
- Curb Weight - Rear: 2812
- Gross Vehicle Weight Rating Cap: 10850
- Fuel Economy Est-Combined:
- EPA Fuel Economy Est - City:
- EPA Fuel Economy Est - Hwy:
- Tons/yr of CO2 Emissions @ 15K mi/year:
- Gross Combined Wt Rating: 27500
- Dead Weight Hitch - Max Trailer Wt.: 5000
- Dead Weight Hitch - Max Tongue Wt.: 500
- Wt Distributing Hitch - Max Trailer Wt.: 18500
- Wt Distributing Hitch - Max Tongue Wt.: 1850
- Fifth Wheel Hitch - Max Trailer Wt.: 17300
- Fifth Wheel Hitch - Max Tongue Wt.: 4325
- Maximum Trailering Capacity: 20000
- Engine Order Code: L5P
- Engine Type: Turbocharged Diesel V8
- Displacement: 6.6L/- TBD -
- Fuel System: Direct Injection
- SAE Net Horsepower @ RPM: 470 @ 2800
- SAE Net Torque @ RPM: 975 @ 1600
- Trans Order Code: MKM
- Trans Type: 10
- Trans Description Cont.: Automatic
- Trans Description Cont. Again:
- First Gear Ratio (:1): 4.54
- Second Gear Ratio (:1): 2.87
- Third Gear Ratio (:1): 2.06
- Fourth Gear Ratio (:1): 1.72
- Fifth Gear Ratio (:1): 1.48
- Sixth Gear Ratio (:1): 1.26
- Seventh Gear Ratio (:1): 1.00
- Eighth Gear Ratio (:1): 0.85
- Ninth Gear Ratio (:1): 0.69
- Tenth Gear Ratio (:1): 0.63
- Reverse Ratio (:1): 4.54
- Clutch Size:
- Trans Power Take Off:
- Trans PTO Access:
- Transfer Case Model: - TBD -
- Transfer Case Gear Ratio (:1), High: 1
- Transfer Case Gear Ratio (:1), Low: - TBD -
- Transfer Case Power Take Off:
- Cold Cranking Amps @ 0° F (Primary): 720
- Cold Cranking Amps @ 0° F (2nd):
- Maximum Alternator Capacity (amps): 170
- Maximum Alternator Watts:
- Total Cooling System Capacity: - TBD -
- Engine Oil Cooler: Yes
- Frame Type: Box Ladder
- Suspension Type - Front: Short/Long Arm w/Torsion Bar
- Suspension Type - Rear: 2-Stage Multi-Leaf
- Spring Capacity - Front: - TBD -
- Spring Capacity - Rear: - TBD -
- Axle Type - Front: - TBD -
- Axle Type - Rear: - TBD -
- Axle Capacity - Front: - TBD -
- Axle Capacity - Rear: - TBD -
- Axle Ratio (:1) - Front: 3.73
- Axle Ratio (:1) - Rear: 3.73
- Shock Absorber Diameter - Front: 51
- Shock Absorber Diameter - Rear: 51
- Stabilizer Bar Diameter - Front: 1.38
- Stabilizer Bar Diameter - Rear:
- Front Tire Order Code: QF9
- Rear Tire Order Code: QF9
- Spare Tire Order Code: ZYG
- Front Tire Size: LT275/65R20
- Rear Tire Size: LT275/65R20
- Spare Tire Size: LT275/70R18
- Front Tire Capacity: - TBD -
- Rear Tire Capacity: - TBD -
- Spare Tire Capacity: - TBD -
- Revolutions/Mile @ 45 mph - Front: - TBD -
- Revolutions/Mile @ 45 mph - Rear: - TBD -
- Revolutions/Mile @ 45 mph - Spare: - TBD -
- Front Wheel Size: 20 x - TBD -
- Rear Wheel Size: 20 x - TBD -
- Spare Wheel Size: 18 x - TBD -
- Front Wheel Material: Aluminum
- Rear Wheel Material: Aluminum
- Spare Wheel Material: - TBD -
- Steering Type: Pwr Recirculating Ball
- Steering Ratio (:1), On Center: - TBD -
- Steering Ratio (:1), At Lock: - TBD -
- Turning Diameter - Curb to Curb: 52.7
- Turning Diameter - Wall to Wall: - TBD -
- Brake Type: Pwr
- Brake ABS System: 4-Wheel
- Brake ABS System (Second Line):
- Disc - Front (Yes or ): Yes
- Disc - Rear (Yes or ): Yes
- Front Brake Rotor Diam x Thickness: 14 x 1.6
- Rear Brake Rotor Diam x Thickness: 14.1 x 1.3
- Drum - Rear (Yes or ):
- Rear Drum Diam x Width:
- Fuel Tank Capacity, Approx: 36
- Aux Fuel Tank Capacity, Approx:
- Fuel Tank Location: - TBD -
- Aux Fuel Tank Location:
- Front Head Room: 43.03
- Front Leg Room: 44.53
- Front Shoulder Room: 66.02
- Front Hip Room: 61.18
- Second Head Room: 40.12
- Second Leg Room: 43.4
- Second Shoulder Room: 65.3
- Second Hip Room: 60.24
- Wheelbase: 158.94
- Length, Overall: 250.75
- Width, Max w/o mirrors: 81.85
- Height, Overall: 79.82
- Overhang, Front: - TBD -
- Overhang, Rear w/o bumper: - TBD -
- Front Bumper to Back of Cab: - TBD -
- Cab to Axle: 42.17
- Cab to End of Frame: - TBD -
- Ground to Top of Load Floor: - TBD -
- Ground to Top of Frame: - TBD -
- Frame Width, Rear: - TBD -
- Ground Clearance, Front: 10.12
- Ground Clearance, Rear: 10.12
- Cargo Box Length @ Floor: 82.2
- Cargo Box Width @ Top, Rear: - TBD -
- Cargo Box Width @ Floor: 71.4
- Cargo Box Width @ Wheelhousings: 51.85
- Cargo Box (Area) Height: 21
- Tailgate Width: - TBD -
- Cargo Volume: 69.5
- Ext'd Cab Cargo Volume: - TBD -
- Model Group: Sierra
- Vehicle Segment: Large Pick-up
- Vehicle Type: Crew Cab
- Body Cab Style: Crew Cab
- Bed Style: regular
- Engine Displacement Units: 6.6
- Engine Camshaft: OHV
- Engine Block Type: iron
- Engine Cylinder Count: 8
- Engine Valve Count: 4
- Country of Origin: United States GMC Truck
Details
- SiriusXM with 360L Trial Subscription
- Preferred Equipment Group 4SB
- Upfitter Switch Kit (5)
- 10-Way Power Driver Seat Adjuster with Lumbar
- Driver Memory
- Power Sliding Rear Window with Defogger
- 10-Way Power Passenger Seat Adjuster with Lumbar
- 1st and 2nd Rows All-Weather Floor Liners
- Power Front Passenger Windows with Express Up/Down
- Deep-Tinted Glass
- Keyless Open and Start
- Rear Wheelhouse Liners
- Power-Retractable Black Assist Steps
- Winter Grille Cover
- Rear Premium Floor Liners with Removable Carpet Insert
- Front Premium Floor Liners with Removable Carpet Insert
- Push Button Start
- Remote Vehicle Starter System
- Electric Rear-Window Defogger
- Front Rain-Sensing Wipers
- Power Sunroof
- Spray-on Pickup Bedliner with GMC Logo
- Technology Package
- Floor-Mounted Center Console
- Inside Rearview Auo-Dimming Rear Camera Mirror
- Pickup Box
- Gloss Black Header Grille and Grille Insert Bars
- Safety Alert Seat
- Radio: AM/FM Stereo with Premium GMC Infotainment System
- Hill Descent Control
- Engine Block Heater
- Exhaust Brake
- Wireless Charging
- Heated Driver and Front Outboard Passenger Seats
- Heated 2nd Row Outboard Seats
- 120-Volt Bed Mounted Power Outlet
- 120-Volt Instrument Panel Power Outlet
- Ventilated Driver and Front Passenger Seats
- 220-Amp Alternator
- Heavy-Duty 80 Amp Battery
- Manual Tilt-Wheel/Telescoping Steering Column
- Max Trailering Package
- 2-Speed Active Transfer Case
- Skid Plates
- AT4 Premium Plus Package
- Sierra HD Pro Safety
- AT4 Preferred Package
- Wireless Phone Projection
- ProGrade Trailering System
- Hitch Guidance with Hitch View
- Wheels: 20" High Gloss Black 8 Spokes Aluminum
- Mobile Service Plus - 3 Years
- Set of 4 Wheel Locks
- Hitch Package
- Perforated Leather-Appointed Front Seat Trim
- Buckle to Drive
- IntelliBeam Automatic High Beam on/Off
- Trailer Cam Provisions and Trailer Viewing Software
- LED Smoked Amber Roof Marker Lamps
- 2 Charge/Data USB Ports Inside Center Console
- 2 USB Ports
- 2 Charge-Only Rear USB Ports
- Ultrasonic Front and Rear Park Assist
- OnStar Services Capable
- Following Distance Indicator
- in-Vehicle Trailering System App
- Forward Collision Alert
- LED Cargo Area Lighting
- Rear Cross Traffic Alert
- Lane Departure Warning System
- Universal Home Remote
- Automatic Emergency Braking
- Steering Wheel Audio Controls
- Front Pedestrian Braking
- Trailer Side Blind Zone Alert
- Bose Premium 7-Speaker Sound System
- Unauthorized Entry Theft-Deterrent System
- HD Surround Vision
- Multicolor 15" Diagonal Head-Up Display
- Bed View Camera with Two Trailer Camera Provisions
- Front License Plate Kit
- Off-Road High Clearance Step
- X31 Off-Road Package
- Gooseneck/5th Wheel Prep Package
- Off-Road Suspension
- 4-Wheel Disc Brakes
- Apple CarPlay/Android Auto
- Premium audio system: Premium GMC Infotainment System
- Emergency communication system: OnStar
- AM/FM radio: SiriusXM with 360L
- Auto High-beam Headlights
- Compass
- 7 Speakers
- Auto-dimming Rear-View mirror
- Ventilated front seats
- Variably intermittent wipers
- Turn signal indicator mirrors
- Trip computer
- Traction control
- Tilt steering wheel
- Telescoping steering wheel
- Steering wheel mounted audio controls
- Split folding rear seat
- Speed-sensing steering
- Speed control
- Security system
- Remote keyless entry
- Rear window defroster
- Rear step bumper
- Rear seat center armrest
- Rear reading lights
- Rain sensing wipers
- Power windows
- Power steering
- Power passenger seat
- Power driver seat
- Power door mirrors
- Passenger vanity mirror
- Passenger door bin
- Panic alarm
- Overhead console
- Overhead airbag
- Outside temperature display
- Occupant sensing airbag
- Memory seat
- Low tire pressure warning
- Illuminated entry
- Heated steering wheel
- Heated rear seats
- Heated front seats
- Heated door mirrors
- Fully automatic headlights
- Front wheel independent suspension
- Front reading lights
- Front fog lights
- Front dual zone A/C
- Front anti-roll bar
- Dual front side impact airbags
- Dual front impact airbags
- Driver vanity mirror
- Driver door bin
- Delay-off headlights
- Bumpers: body-color
- Brake assist
- Automatic temperature control
- Auto-dimming door mirrors
- Alloy wheels
- ABS brakes
- Voltmeter
- Tachometer
- Front Center Armrest
- Front Bucket Seats
- Electronic Stability Control
- Air Conditioning
- Driver Air Bag
- Passenger Air Bag
- Passenger Air Bag On/Off Switch
- Front Side Air Bag
- Front Head Air Bag
- Rear Head Air Bag
- Climate Control
- Multi-Zone A/C
- A/C
- Security System
- AM/FM Stereo
- ABS
- Cruise Control
- Rear Defrost
- Locking/Limited Slip Differential
- Four Wheel Drive
- 8 Cylinder Engine
- Turbocharged
- Floor Mats
- Diesel Fuel
- Daytime Running Lights
- Keyless Entry
- Power Door Locks
- Heated Mirrors
- Power Mirror(s)
- Navigation System
- Running Boards/Side Steps
- Power Driver Seat
- Power Passenger Seat
- Leather Seats
- Bucket Seats
- Power Steering
- Adjustable Steering Wheel
- Conventional Spare Tire
- Traction Control
- Aluminum Wheels
- Power Windows
- Intermittent Wipers
- A/T
- Premium Sound System
- Satellite Radio
- MP3 Capability
- Fog Lamps
- Heated Front Seat(s)
- Privacy Glass
- Variable Speed Intermittent Wipers
- Rain Sensing Wipers
- Auto-Dimming Rearview Mirror
- Integrated Turn Signal Mirrors
- Mirror Memory
- Rear Parking Aid
- Driver Adjustable Lumbar
- Passenger Adjustable Lumbar
- Seat Memory
- Tow Hitch
- Tow Hooks
- Tire Pressure Monitor
- Bluetooth Connection
- Telematics
- Bed Liner
- Remote Engine Start
- Back-Up Camera
- Stability Control
- Keyless Start
- Auxiliary Audio Input
- Heated Rear Seat(s)
- Cooled Front Seat(s)
- Power Folding Mirrors
- Rear Bench Seat
- Passenger Air Bag Sensor
- Blind Spot Monitor
- Lane Departure Warning
- Heated Steering Wheel
- Cross-Traffic Alert
- WiFi Hotspot
- 10-Speed A/T
- Adaptive Cruise Control
- Smart Device Integration
- Driver Restriction Features
- Aerial View Display System
- Front Collision Mitigation
- Front Collision Warning
- Automatic Highbeams
- Requires Subscription
- Integrated Tailgate Step
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All Vehicles Prices include a $225 documentation fee. All Vehicle prices do not include additional fees and costs of closing, including government fees and taxes, any finance charges, any emissions testing fees or other fees. All prices, specifications and availability subject to change without notice. Contact dealer for most current information