[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 AT4X VIN 1GT4UZEY5TF299334 · Stock TF299334 ![2026 GMC Sierra 2500HD AT4X in Titanium, photo 1 of 54](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2F0b1c35d2-7018-487d-a0f4-581e2bc6a13e.png&w=3840&q=80)![2026 GMC Sierra 2500HD AT4X in Titanium, photo 2 of 54](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2Fe75e9bfe-df93-418a-8dfd-b43e4e7c4008.png&w=3840&q=80)![2026 GMC Sierra 2500HD AT4X in Titanium, photo 3 of 54](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2F4f9b895d-739d-4724-a774-be129b4b6a5a.png&w=3840&q=80)![2026 GMC Sierra 2500HD AT4X in Titanium, photo 4 of 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54](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2F92bd4f52-3814-47ad-b660-c75540c5f182.jpg&w=3840&q=80)![2026 GMC Sierra 2500HD AT4X in Titanium, photo 53 of 54](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2F32836226-058d-4c94-8eec-93004ff28839.jpg&w=3840&q=80)![2026 GMC Sierra 2500HD AT4X in Titanium, photo 54 of 54](/_next/image/?url=https%3A%2F%2Fassets.cai-media-management.com%2Fresize%2F1024x1024%2Fcommon-vehicle-media%2Fa570923c-34c5-4cb3-ae91-ef9f1333ea6c.jpg&w=3840&q=80) 54 photos MSRP$99,995 **Manufacturer offers**Through Nov 30 GMC Bonus Cash−$2,000 Price$97,995 Price excludes tax, title, license and the $225 documentary fee. [Check availability](/inventory/new-2026-gmc-sierra-2500hd-at4x-4wd-4d-crew-cab-1gt4uzey5tf299334/?form=availability)[Schedule a test drive](/inventory/new-2026-gmc-sierra-2500hd-at4x-4wd-4d-crew-cab-1gt4uzey5tf299334/?form=test-drive)[Ask a question](/inventory/new-2026-gmc-sierra-2500hd-at4x-4wd-4d-crew-cab-1gt4uzey5tf299334/?form=question) [Calculate your payment](https://app.autoapr.com/reveal/4d0nhx37/1GT4UZEY5TF299334) ## 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 Titanium Interior Obsidian Rush Fuel Diesel ### Equipment 144 #### Packages * Black Badging Package * Gooseneck/5th Wheel Prep Package * Preferred Equipment Group 4SG #### 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 * 12 Speakers * AM/FM radio: SiriusXM with 360L * Bose Premium Series 12-Speaker System * Premium audio system: Premium GMC Infotainment System 15 more * 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 * Heads-Up Display * 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 54 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 moonroof * Power Sunroof * Active Cruise Control * LED Cargo Area Lighting * Auto-dimming Rear-View mirror * Floor-Mounted Center Console * Front Premium Floor Liners with Removable Carpet Insert * Garage door transmitter * Heated steering wheel * Leather steering wheel * Rear Premium Floor Liners with Removable Carpet Insert * Rear reading lights * Rear seat center armrest * Voltmeter * 16-Way Power Driver Seat Adjuster with Lumbar * 16-Way Power Passenger Seat Adjuster with Lumbar * Front Center Armrest * Full Grain Leather Seat Trim * Heated 2nd Row Outboard Seats * Heated Driver and Front Outboard Passenger Seats * Heated front seats * Heated rear seats * 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 20 more * Black GMC Emblems * Black Sierra Nameplates * Gloss Black Door Handles * Gloss Black Header Grille and Grille Insert Bars * IntelliBeam Automatic High Beam on/Off * LED Smoked Amber Roof Marker Lamps * Rear step bumper * Rear Wheelhouse Liners * Spray-on Pickup Bedliner with GMC Logo * Turn signal indicator mirrors * Wheels: 18" Machined Aluminum with High Gloss Black Accents * 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 11 more * 2-Speed Active Transfer Case * 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 * Hitch Guidance with Hitch View * in-Vehicle Trailering System App * Trailer Tire Pressure Monitor Sensors * 3.73 Rear Axle Ratio * Power steering * Front anti-roll bar ### From the store Call us at 512-954-9290 The 2026 GMC Sierra 2500HD AT4X in Gray represents serious capability engineered for those who demand dependable performance. Built on a foundation of proven diesel technology, this truck delivers the strength and reliability you need for demanding work and weekend adventures alike. \- Duramax 6.6L V8 Turbodiesel engine with 470 hp and 975 lb-ft of torque \- 10-Speed Automatic transmission with 4WD capability \- 2-Speed Active Transfer Case for terrain management \- Gooseneck/5th Wheel Prep Package with hitch platform \- Bose Premium Series 12-Speaker System with SiriusXM 360L Trial \- Black Badging Package with gloss black grille and black GMC emblems \- 18" Machined Aluminum wheels with high gloss black accents \- 120-Volt bed-mounted and instrument panel power outlets \- Multicolor 15" Head-Up Display with advanced driver information \- Spray-on Pickup Bedliner with GMC Logo \- Heated and ventilated front seats with 16-way power adjusters \- Active Cruise Control with Forward Collision Alert and Automatic Emergency Braking \- HD Surround Vision with Bed View Camera and trailer camera provisions \- Hill Descent Control and Electronic Stability Control The AT4X trim combines rugged utility with refined comfort. A diesel engine with an engine block heater provides the torque and efficiency needed for heavy hauling, while the 220-amp alternator ensures reliable electrical capacity for work and accessories. The truck features full grain leather seating, heated and ventilated front seats, and heated rear seating—creating an environment that rewards both long workdays and extended journeys. Technology integration keeps you connected and in control. Wireless phone projection through Apple CarPlay and Android Auto connects your devices seamlessly. The in-vehicle trailering system app and trailer tire pressure monitor sensors simplify towing operations. Ultrasonic front and rear park assist, rear cross traffic alert, and trailer side blind zone alert enhance confidence in any situation. Safety systems work together to protect what matters. Automatic emergency braking, forward pedestrian braking, and lane departure warning systems provide active protection. The safety alert seat provides haptic feedback to enhance awareness. A comprehensive airbag system, including overhead airbags and occupant sensing technology, surrounds you with multiple layers of protection. The AT4X's off-road suspension and 2-speed active transfer case deliver genuine capability when pavement ends. Black premium floor liners protect the cabin, while the electric rear window and power sliding functionality add everyday convenience. Memory settings for the driver's seat and power moonroof address comfort during regular operation. Call us at 512-954-9290 Price includes: $2000 - GMC Bonus Cash. Exp. 11/30/2026 ## Check availability Close 2026 GMC Sierra 2500HD AT4XStock TF299334 · 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 AT4XStock TF299334 · 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 AT4XStock TF299334 · Covert Buick GMC Bee Cave First name Last name Email Phone An email or a phone number is enough. 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