GMC Sierra 2500 HD near Dumas, TX | Greg Lair Buick GMC

Built for Heavy Work, Ready for Texas Roads

Looking for a GMC Sierra 2500 HD near Dumas, TX? At Greg Lair Buick GMC, we carry one of the largest GMC selections in Texas, and the Sierra 2500 HD leads our truck lineup for drivers who need real, proven capability. This heavy-duty workhorse is built for long hauls across the Panhandle, demanding days on the ranch, and workweeks that don't slow down. 

• Two engine options, including an available Duramax diesel with a class-leading 975 lb-ft of torque, let you match your powertrain to your actual workload.
• Available max towing of up to 22,390 lbs on the Crew Cab puts serious pulling power at your disposal from day one.
• Seven trim levels span the full range, from a no-nonsense work truck to a full-luxury hauler with first-class interior appointments.

Every new Sierra 2500 HD you buy from Greg Lair Buick GMC comes with our free Lifetime Powertrain Warranty. Keep up with factory-recommended maintenance, and your powertrain is covered for unlimited time and unlimited miles, including on diesel models. That kind of long-term protection is something most dealerships simply don't offer.

Two Engine Options, One Common Goal

This heavy-duty truck starts with a 6.6L V8 gas engine producing 401 horsepower and 464 lb-ft of torque, paired with an Allison 10-speed automatic transmission. It handles hauling and daily towing with a confident, controlled feel and is a solid choice for drivers who want dependable gas power with straightforward ownership. For those who need more muscle, the available Duramax 6.6L Turbo-Diesel V8 delivers 470 horsepower and a class-leading 975 lb-ft of torque, with a 25% improvement in torque at lower RPM compared to the previous version. That low-end grunt means stronger acceleration from a standing start, better performance on grades, and a steadier feel when hauling heavy loads over long distances. The Duramax is standard on the Denali Ultimate and available on every other trim.

Towing Capability and the Technology Behind It

The Sierra 2500 HD Crew Cab offers available max towing of up to 22,390 lbs, and every Pro trim is already equipped with a trailering package, trailering mirrors, and a trailer brake controller. You don't need an options package to get your truck ready to work. Move up to the SLT and you gain the ProGrade Trailering System with an In-Vehicle Trailering App, which lets you manage trailer profiles and monitor key stats without digging through multiple screens. Higher trims offer up to 14 available camera views, including transparent trailer view and HD Surround Vision, giving you more visibility during hookup and on the road. These tools make working with a heavy load safer and less stressful, whether you're on the highway or backing into a tight spot on the job.

The GMC Sierra 2500 HD Near Dumas, TX: Trim Options

The lineup runs from the hardworking Pro all the way to the Denali Ultimate, with each trim building on the one below it. Use the table below to compare key features across all seven options.

Trim	Starting MSRP	Standard Engine	Duramax Diesel	Touchscreen	Front Seating	Signature Feature
Pro	$47,000*	6.6L V8 Gas (401 hp / 464 lb-ft)	Available	Wireless CarPlay & Android Auto	Cloth	Trailering Package, Mirrors & Trailer Brake Controller
SLE	$54,000*	6.6L V8 Gas (401 hp / 464 lb-ft)	Available	13.4" Touchscreen + 12.3" Digital DIC	Cloth	17" Machined Aluminum Wheels; X31 Off-Road Package Available
SLT	$65,200*	6.6L V8 Gas (401 hp / 464 lb-ft)	Available	13.4" Touchscreen + 12.3" Digital DIC	10-Way Power Heated Seats w/ Lumbar	ProGrade Trailering System; Heated Steering Wheel; 18" Machined Wheels
AT4	$72,200*	6.6L V8 Gas (401 hp / 464 lb-ft)	Available	13.4" Touchscreen + 12.3" Digital DIC	Leather, Heated & Ventilated	Rancho Off-Road Suspension + Skid Plates; 20" Gloss-Black Wheels; Up to 14 Camera Views
AT4X	$85,200*	6.6L V8 Gas (401 hp / 464 lb-ft)	Available	13.4" Touchscreen + 12.3" Digital DIC	16-Way Power, Heated/Ventilated w/ Massage	Factory 1.5" Lift; Multimatic DSSV Dampers; Rear Locking Differential; 35" Goodyear MT Tires
Denali	$75,200*	6.6L V8 Gas (401 hp / 464 lb-ft)	Available	13.4" Touchscreen + 12.3" Digital DIC	12-Way Power, Heated & Ventilated	Chrome Grille; Authentic Wood Trim; Forge Perforated Leather; 20" Ultra-Bright Wheels
Denali Ultimate	$94,200*	Duramax 6.6L Turbo-Diesel V8 (Standard)	Standard	13.4" Touchscreen + 12.3" Digital DIC	16-Way Power, Heated/Ventilated w/ Massage	Full-Grain Leather; Paldao Wood; 12-Speaker Bose Audio; Illuminated Power Steps; MultiPro Tailgate Audio by KICKER

*Starting MSRP figures are for this truck. Actual pricing varies by cab style, bed length, drivetrain, and installed options. Contact Greg Lair Buick GMC for current pricing and availability.

A Cabin Built to Match the Truck

The Sierra 2500 HD earns credit for what's inside, too. Best-in-class standard Crew Cab front head and leg room means your whole crew has room to breathe on long days. Wireless Apple CarPlay and wireless Android Auto are standard on every trim, and the 13.4" diagonal center touchscreen, which begins with the SLE, adds Google built-in compatibility and voice-activated controls that keep your hands where they belong. Upper trims bring heated and ventilated leather seating, a 12.3" digital Driver Information Center, and an available 15" Head-Up Display that puts speed and alert information in your sightline. The Denali Ultimate takes the interior further with full-grain leather, authentic Paldao wood trim, and a 12-speaker Bose Premium audio system that changes what the cab of a work truck can feel like.

Safety Tech That Comes Standard

Every trim includes Forward Collision Alert, Automatic Emergency Braking, Front Pedestrian Braking, Lane Departure Warning, IntelliBeam automatic high beams, and Buckle to Drive as standard equipment. These aren't features reserved for upper tiers. They come with the truck at every price point, giving every buyer a solid safety foundation from the start.