[Home](/) / [New vehicles](/new-vehicles/) / [GMC](/new-vehicles/gmc/) / [Sierra 2500HD](/new-vehicles/gmc/sierra-2500hd/) New · Covert Buick GMC Bee Cave # 2026 GMC Sierra 2500HD AT4 VIN 1GT4UPEY9TF350273 · Stock TF350273 ![2026 GMC Sierra 2500HD AT4 in Onyx Black, photo 1 of 32](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2Ffbccf286-c7eb-460d-9c74-6863ddf4e10a.png&w=3840&q=80)![2026 GMC Sierra 2500HD AT4 in Onyx Black, photo 2 of 32](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2F80498b93-31e4-4289-b56e-68b7fdb528e1.png&w=3840&q=80)![2026 GMC Sierra 2500HD AT4 in Onyx Black, photo 3 of 32](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2F5da1ca10-cb4f-423c-8728-9fbc4ff8658f.png&w=3840&q=80)![2026 GMC Sierra 2500HD AT4 in Onyx Black, photo 4 of 32](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2F83b67715-2ada-4cd7-9024-450650114992.png&w=3840&q=80)![2026 GMC Sierra 2500HD AT4 in Onyx Black, photo 5 of 32](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2Ff28f940d-efea-4841-8300-5a231eb0a09b.png&w=3840&q=80)![2026 GMC Sierra 2500HD AT4 in Onyx Black, photo 6 of 32](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2F9576e81a-bd28-42ac-995a-d26264f0a29a.png&w=3840&q=80)![2026 GMC Sierra 2500HD AT4 in Onyx Black, photo 7 of 32](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2F84751d94-d198-462a-8a4f-9d65bc344ef8.png&w=3840&q=80)![2026 GMC Sierra 2500HD AT4 in Onyx Black, photo 8 of 32](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2F21f24b7f-6869-4893-b672-80d9a5e5bdfd.png&w=3840&q=80)![2026 GMC Sierra 2500HD AT4 in Onyx Black, photo 9 of 32](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2Fd3c38d90-866c-42f9-b34e-fe037851fc61.png&w=3840&q=80)![2026 GMC Sierra 2500HD AT4 in Onyx Black, photo 10 of 32](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2F830028b0-b3fc-4e73-8d7d-9626ac8268dc.png&w=3840&q=80)![2026 GMC Sierra 2500HD AT4 in Onyx Black, photo 11 of 32](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2F4b864621-be8d-45bc-a687-fd8c8ebd8e8d.png&w=3840&q=80)![2026 GMC Sierra 2500HD AT4 in Onyx Black, photo 12 of 32](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2F576ffab3-ab9b-42d5-a65c-0af660c682a8.png&w=3840&q=80)![2026 GMC Sierra 2500HD AT4 in Onyx Black, photo 13 of 32](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2F0a63e57b-80d7-42a7-b8fa-ef8f876e1a58.png&w=3840&q=80)![2026 GMC Sierra 2500HD AT4 in Onyx Black, photo 14 of 32](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2Fd6db3f98-7803-478c-b449-aefe571e2215.png&w=3840&q=80)![2026 GMC Sierra 2500HD AT4 in Onyx Black, photo 15 of 32](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2Faf2a1942-3541-487d-ae77-3cc0d906aaae.png&w=3840&q=80)![2026 GMC Sierra 2500HD AT4 in Onyx Black, photo 16 of 32](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2F8acbc4b5-9e8a-4261-bd03-db4f4c2dd7bc.png&w=3840&q=80)![2026 GMC Sierra 2500HD AT4 in Onyx Black, photo 17 of 32](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2Ffe6ef6d6-7400-453e-ab39-250612785518.png&w=3840&q=80)![2026 GMC Sierra 2500HD AT4 in Onyx Black, photo 18 of 32](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2F699b1141-fe3f-449f-8d84-1b7c726460b8.png&w=3840&q=80)![2026 GMC Sierra 2500HD AT4 in Onyx Black, photo 19 of 32](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2Fb58a9608-79cf-4565-86e3-f6e796182adc.png&w=3840&q=80)![2026 GMC Sierra 2500HD AT4 in Onyx Black, photo 20 of 32](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2Fe83de97c-a735-4aa5-bc34-254b74fe0188.png&w=3840&q=80)![2026 GMC Sierra 2500HD AT4 in Onyx Black, photo 21 of 32](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2F7918befe-2ce0-47ed-9940-f4741e1a967f.png&w=3840&q=80)![2026 GMC Sierra 2500HD AT4 in Onyx Black, photo 22 of 32](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2Ff679c131-f3f4-4400-9de1-d288827fc0b2.png&w=3840&q=80)![2026 GMC Sierra 2500HD AT4 in Onyx Black, photo 23 of 32](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2Fd899dac4-2199-4d90-bcff-888092c15c99.png&w=3840&q=80)![2026 GMC Sierra 2500HD AT4 in Onyx Black, photo 24 of 32](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2Fe3821236-914d-46ef-9981-108b6e21ca2f.png&w=3840&q=80)![2026 GMC Sierra 2500HD AT4 in Onyx Black, photo 25 of 32](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2F7ce3e73d-c01c-4589-a3b5-b149bd59c04d.png&w=3840&q=80)![2026 GMC Sierra 2500HD AT4 in Onyx Black, photo 26 of 32](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2Fcc575311-7337-4c6b-8fc3-31f3b354f29d.png&w=3840&q=80)![2026 GMC Sierra 2500HD AT4 in Onyx Black, photo 27 of 32](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2F00dcf056-7f4e-4758-86bf-099bf8e5dc58.png&w=3840&q=80)![2026 GMC Sierra 2500HD AT4 in Onyx Black, photo 28 of 32](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2Fe336b87e-3130-44d1-bd58-d48de91ef3a6.png&w=3840&q=80)![2026 GMC Sierra 2500HD AT4 in Onyx Black, photo 29 of 32](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2F9863f5bd-9d85-4313-8f69-bf00378ba1fb.png&w=3840&q=80)![2026 GMC Sierra 2500HD AT4 in Onyx Black, photo 30 of 32](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2F6785ca5c-4d12-48de-a098-4b17fb2338a4.png&w=3840&q=80)![2026 GMC Sierra 2500HD AT4 in Onyx Black, photo 31 of 32](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2F7ee3861a-87b6-45ac-956a-accd647b2822.png&w=3840&q=80)![2026 GMC Sierra 2500HD AT4 in Onyx Black, photo 32 of 32](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2F4228744c-0156-44f8-9325-2b39ffa8c9f5.png&w=3840&q=80) 32 photos Price$127,592 Price excludes tax, title, license and the $225 documentary fee. [Check availability](/inventory/new-2026-gmc-sierra-2500hd-at4-4wd-4d-crew-cab-1gt4upey9tf350273/?form=availability)[Schedule a test drive](/inventory/new-2026-gmc-sierra-2500hd-at4-4wd-4d-crew-cab-1gt4upey9tf350273/?form=test-drive)[Ask a question](/inventory/new-2026-gmc-sierra-2500hd-at4-4wd-4d-crew-cab-1gt4upey9tf350273/?form=question) [Calculate your payment](https://app.autoapr.com/reveal/4d0nhx37/1GT4UPEY9TF350273) ## Calculate your payment Close [Trading in your car for this GMC Sierra 2500HD?Get an offer for it and put it toward this one.](/value-your-trade/) Covert Buick GMC Bee Cave[(512) 954-9290](tel:+15129549290) 16501 Sweetwater Village Dr Bldg 1, Austin, TX 78738 Sales: Monday to Saturday, 9 AM to 7 PM; closed Sunday ### Details Engine 6.6L V8 diesel Transmission 10-speed automatic Drivetrain 4WD Engine Duramax 6.6L V8 Turbodiesel Body 4D Crew Cab Exterior Onyx Black Interior Jet Black With Kalahari Accents Fuel Diesel ### Equipment 148 #### Packages * AT4 Preferred Package * AT4 Premium Plus Package * Gooseneck/5th Wheel Prep Package * Preferred Equipment Group 4SB 2 more * Technology Package * X31 Off-Road Package #### Safety * Emergency communication system: OnStar * Lane Departure Warning System * Security system * Unauthorized Entry Theft-Deterrent System 21 more * Automatic Emergency Braking * Buckle to Drive * Following Distance Indicator * Forward Collision Alert * Front Pedestrian Braking * HD Surround Vision * Inside Rearview Auo-Dimming Rear Camera Mirror * Rear Cross Traffic Alert * Ultrasonic Front and Rear Park Assist * Safety Alert Seat * Traction control * 4-Wheel Disc Brakes * ABS brakes * Dual front impact airbags * Dual front side impact airbags * Low tire pressure warning * Occupant sensing airbag * Overhead airbag * Brake assist * Electronic Stability Control * Panic alarm #### Technology * 3 Years SiriusXM * 7 Speakers * AM/FM radio: SiriusXM with 360L * Bose Premium 7-Speaker Sound System 15 more * Premium audio system: Premium GMC Infotainment System * Radio: AM/FM Stereo with Premium GMC Infotainment System * SiriusXM with 360L Trial Subscription * Steering Wheel Audio Controls * 120-Volt Bed Mounted Power Outlet * 120-Volt Instrument Panel Power Outlet * 2 Charge-Only Rear USB Ports * 2 Charge/Data USB Ports Inside Center Console * 2 USB Ports * Apple CarPlay/Android Auto * Multicolor 15" Diagonal Head-Up Display * OnStar Services Capable * Wireless Charging * Wireless Phone Projection * Steering wheel mounted audio controls #### Interior * Automatic temperature control * Electric Rear-Window Defogger * Front dual zone A/C * Rear window defroster 51 more * Driver Memory * Memory seat * Power driver seat * Push Button Start * Remote Vehicle Starter System * Universal Home Remote * Manual Tilt-Wheel/Telescoping Steering Column * Keyless Open and Start * Power Sunroof * LED Cargo Area Lighting * 1st and 2nd Rows All-Weather Floor Liners * Auto-dimming Rear-View mirror * Floor-Mounted Center Console * Front Premium Floor Liners with Removable Carpet Insert * Heated steering wheel * Rear Premium Floor Liners with Removable Carpet Insert * Rear reading lights * Rear seat center armrest * Voltmeter * 10-Way Power Driver Seat Adjuster with Lumbar * 10-Way Power Passenger Seat Adjuster with Lumbar * Front Center Armrest * Heated 2nd Row Outboard Seats * Heated Driver and Front Outboard Passenger Seats * Heated front seats * Heated rear seats * Perforated Leather-Appointed Front Seat Trim * Power passenger seat * Ventilated Driver and Front Passenger Seats * Ventilated front seats * Power Front Passenger Windows with Express Up/Down * Power Sliding Rear Window with Defogger * Air Conditioning * Power windows * Remote keyless entry * Speed control * Compass * Driver door bin * Driver vanity mirror * Front reading lights * Illuminated entry * Outside temperature display * Overhead console * Passenger vanity mirror * Tachometer * Telescoping steering wheel * Tilt steering wheel * Trip computer * Front Bucket Seats * Split folding rear seat * Passenger door bin #### Exterior * Pickup Box * Auto High-beam Headlights * Front fog lights * Auto-dimming door mirrors 22 more * Bumpers: body-color * Front License Plate Kit * Gloss Black Header Grille and Grille Insert Bars * IntelliBeam Automatic High Beam on/Off * LED Smoked Amber Roof Marker Lamps * Off-Road High Clearance Step * Rear step bumper * Rear Wheelhouse Liners * Spray-on Pickup Bedliner with GMC Logo * Turn signal indicator mirrors * Winter Grille Cover * Black Lug Nut & Wheel Lock Kit * Wheels: 20" High Gloss Black 8 Spokes Aluminum * Deep-Tinted Glass * Front Rain-Sensing Wipers * Rain sensing wipers * Delay-off headlights * Fully automatic headlights * Heated door mirrors * Power door mirrors * Alloy wheels * Variably intermittent wipers #### Mechanical * Off-Road Suspension * Speed-sensing steering * Front wheel independent suspension * Hill Descent Control 13 more * 2-Speed Active Transfer Case * 220-Amp Alternator * Engine Block Heater * Exhaust Brake * Heavy-Duty 80 Amp Battery * Bed View Camera with Two Trailer Camera Provisions * Trailer Cam Provisions and Trailer Viewing Software * Trailer Side Blind Zone Alert * Upfitter Switch Kit (5) * Hitch Guidance with Hitch View * in-Vehicle Trailering System App * Power steering * Front anti-roll bar ### From the store Call us at 512-954-9290 The 2026 GMC Sierra 2500HD AT4 in Black delivers professional capability with refined detail. This truck is built to handle demanding work while providing the comfort and technology you expect from a premium diesel pickup. \- Duramax 6.6L V8 Turbodiesel with 470 hp and 975 lb-ft of torque \- 10-Speed Automatic transmission with 4WD \- AT4 Premium Plus Package with power sunroof \- 2-Speed Active Transfer Case and off-road suspension \- HD Surround Vision with Bed View Camera and trailer camera provisions \- Multicolor 15" Head-Up Display \- Bose Premium 7-Speaker Sound System with SiriusXM \- Wireless charging and wireless phone projection \- Heated and ventilated front seats with heated second row \- Gooseneck/5th Wheel Prep Package hitch platform \- Upfitter Switch Kit (5) with configurable circuits for accessories \- All-weather floor liners with AT4 logo \- Engine block heater and 220-amp alternator \- Black badging package with gloss black grille The heart of this Sierra is the proven Duramax diesel engine, engineered to deliver the torque you need for towing and hauling while maintaining efficiency. The 10-speed automatic transmission pairs seamlessly with the engine to provide smooth power delivery in all conditions. The 4WD system with 2-speed active transfer case and hill descent control gives you confidence navigating challenging terrain, whether you're on a job site or exploring off-road trails. Inside, the AT4 Premium Plus Package elevates your driving experience with a power sunroof and Technology Package features. The multicolor head-up display keeps critical information in your line of sight, while the Bose premium sound system with SiriusXM keeps you connected during long drives. Wireless charging and wireless phone projection integrate your devices seamlessly. The heated and ventilated leather front seats adjust with 10-way power, and heated rear seats provide comfort for all passengers. Capability meets practicality with features designed for work. The gooseneck/5th wheel prep package includes hitch platform, stamped bed holes, and a 7-pin trailer harness for seamless towing setup. The bed-mounted 120-volt power outlet powers tools and equipment, while the upfitter switch kit with five configurable circuits accommodates aftermarket electrical systems. The spray-on bedliner protects your investment, and the HD surround vision with trailer viewing gives you complete awareness when backing or towing. Safety and convenience integrate throughout the truck. Automatic emergency braking, forward pedestrian braking, and lane departure warning help protect you on every journey. Ultrasonic front and rear park assist simplifies parking, while rear cross traffic alert and trailer side blind zone alert enhance awareness. The bed view camera with trailer camera provisions gives you multiple vantage points, and the auto-dimming rear-view mirror reduces glare. The exterior reflects the AT4's purposeful design with black GMC emblems, black Sierra nameplates, and a gloss black header grille. LED cargo area lighting and smoked amber roof marker lamps provide function and style. The 20" high gloss black aluminum wheels complete the commanding presence. This 2026 Sierra 2500HD AT4 is ready to work and ready to impress. Visit the showroom to experience the capability, comfort, and technology this truck brings to your ownership. Call us at 512-954-9290 Price includes: $2000 - GMC Bonus Cash. Exp. 11/30/2026 $2500 - Buick & GMC Consumer Cash Program. Exp. 11/30/2026 ## Check availability Close 2026 GMC Sierra 2500HD AT4Stock TF350273 · Covert Buick GMC Bee Cave First name Last name Email Phone An email or a phone number is enough. ZIP code (optional) Leave this field empty Check availability By submitting, you agree that Covert Buick GMC Bee Cave may contact you about this request by phone, text or email. ## Schedule a test drive Close 2026 GMC Sierra 2500HD AT4Stock TF350273 · Covert Buick GMC Bee Cave First name Last name Email Phone An email or a phone number is enough. ZIP code (optional) Preferred day (optional) Time of day (optional)Any timeMorningAfternoonEvening Leave this field empty Schedule a test drive By submitting, you agree that Covert Buick GMC Bee Cave may contact you about this request by phone, text or email. ## Ask a question Close 2026 GMC Sierra 2500HD AT4Stock TF350273 · Covert Buick GMC Bee Cave First name Last name Email Phone An email or a phone number is enough. ZIP code (optional) Your question Leave this field empty Ask a question By submitting, you agree that Covert Buick GMC Bee Cave may contact you about this request by phone, text or email. ## Similar vehicles in stock [All new vehicles →](/new-vehicles/) [![2026 GMC Sierra 2500HD Denali Ultimate in Sterling Metallic](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2F6af98ea5-48db-45bc-99a6-e2c084c22056.png&w=3840&q=80)New · Covert Buick GMC Bee Cave2026 GMC Sierra 2500HD Denali UltimateSterling Metallic · 4WDPrice$126,180Stock TF377401 · VIN 1GT4UXEY6TF377401](/inventory/new-2026-gmc-sierra-2500hd-denali-ultimate-4wd-4d-crew-cab-1gt4uxey6tf377401/)[![2026 GMC Sierra 2500HD AT4 in Summit White](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2Fea86b36e-212a-4c8d-9b47-6ac02cd5a969.png&w=3840&q=80)New · Covert Buick GMC Bee Cave2026 GMC Sierra 2500HD AT4Summit White · 4WDPrice$111,749Stock TF337264 · VIN 1GT4UPEY9TF337264](/inventory/new-2026-gmc-sierra-2500hd-at4-4wd-4d-crew-cab-1gt4upey9tf337264/)[![2026 GMC Sierra 2500HD Denali in Titanium](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2Ff12b3ce8-f97d-483a-9122-7120a3979dc4.png&w=3840&q=80)New · Covert Buick GMC Bee Cave2026 GMC Sierra 2500HD DenaliTitanium · 4WDPrice$111,375Stock TF199434 · VIN 1GT4UREY2TF199434](/inventory/new-2026-gmc-sierra-2500hd-denali-4wd-4d-crew-cab-1gt4urey2tf199434/)[![2026 GMC Sierra 3500HD Denali Ultimate in Summit White](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2F3bdabbc6-25ad-4c00-b74c-21bfccb9cd03.png&w=3840&q=80)New · Covert Buick GMC Bee Cave2026 GMC Sierra 3500HD Denali UltimateSummit White · 4WDPrice$118,075Stock TF152465 · VIN 1GT4UYEY6TF152465](/inventory/new-2026-gmc-sierra-3500hd-denali-ultimate-4wd-4d-crew-cab-1gt4uyey6tf152465/)[![2027 Ram 2500 Limited in Diamond Black](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2F9a1520ee-cc98-4ca4-980d-3fd36500fc74.png&w=3840&q=80)New · Covert CDJR Bee Cave2027 Ram 2500 LimitedDiamond Black · 4WDPrice$96,094Stock VG418934 · VIN 3C63R5SL2VG418934](/inventory/new-2027-ram-2500-limited-4wd-4d-crew-cab-3c63r5sl2vg418934/)[![](/_next/image/?url=%2F_next%2Fstatic%2Fimmutable%2Fmedia%2Fno-photo.1dn04h7xk64d3.jpg&w=3840&q=80)Photos coming soonNew · Covert Buick GMC Bee Cave2026 GMC Sierra 3500HD DenaliOnyx Black · 4WDPrice$91,310Stock TF426397 · VIN 1GT4UWEYXTF426397](/inventory/new-2026-gmc-sierra-3500hd-denali-4wd-4d-crew-cab-1gt4uweyxtf426397/)