New 2026 GMC Sierra 1500 For Sale in Lawton
Southwest Buick GMC - Lawton, OK
New 2026 GMC Sierra 1500 For Sale in Lawton, OK
The 2026 GMC Sierra 1500 is in stock now at Southwest Buick GMC in Lawton, with eight trim levels, four engine choices, and a 13.4-inch touchscreen with Google built-in.
Full-Size Truck - Lawton, OK
Professional Grade Capability, Built for Lawton
The 2026 GMC Sierra 1500 pairs proven full-size truck hardware with genuinely useful technology. Four engines span the efficient 2.7L TurboMax, two EcoTec3 V8s, and the class-leading 3.0L Duramax turbo-diesel. Properly equipped, the Sierra tows up to 13,300 pounds.
At Southwest Buick GMC in Lawton our team knows every trim, package and engine combination in the lineup. Whether you need the work-ready Pro, the off-road AT4X with its Multimatic DSSV dampers, or the Denali Ultimate with its carbon-fiber bed and Super Cruise, we will help you configure the right truck.
13.4"
Premium Touchscreen, Google Built-In
13,300 lbs
Maximum Towing Capacity
8 Trims
Pro Through Denali Ultimate
Eight Trim Levels
All Eight 2026 GMC Sierra 1500 Trim Levels
From the work-ready Pro to the carbon-fiber-bedded Denali Ultimate, the 2026 Sierra 1500 spans eight distinct configurations across four engines.
Pro
The work-ready foundation. 17-inch steel wheels, LED headlights, vinyl or cloth seating, a 7-inch touchscreen with wireless Apple CarPlay and Android Auto, and GMC Pro Safety driver assistance standard.
Popular
SLE
Steps up to alloy wheels, the six-function MultiPro tailgate, locking rear differential, remote start, dual-zone climate, the 13.4-inch touchscreen with Google built-in, 12.3-inch digital cluster, plus heated front seats and steering wheel.
New Package
Elevation
Blacked-out exterior styling with body-color accents and dark badging. The new-for-2026 Elevation Select Package adds further content on 2.7L TurboMax builds.
SLT
The value sweet spot. Adds leather-appointed seating, upgraded interior trim, enhanced lighting, and a longer standard equipment list over the Elevation.
Off-Road
AT4
Off-road capability with standard 4WD, a two-inch factory lift, off-road suspension, skid plates, hill descent control, red recovery hooks, and an AT4-exclusive drive mode.
Extreme Off-Road
AT4X
Maximum off-road hardware with Multimatic DSSV dampers, front and rear electronic locking differentials, 18-inch wheels on all-terrain tires, and full underbody protection.
Luxury
Denali
Signature GMC luxury with real open-pore wood, authentic aluminum trim, premium leather, a 12-speaker Bose audio system, and available Super Cruise hands-free driving.
Flagship
Denali Ultimate
The pinnacle: standard 6.2L V8, Super Cruise, a carbon-fiber composite cargo bed, 22-inch wheels, full-grain leather with massage function, power sunroof, and retractable assist steps.
Powertrain Lineup
Four Engines. One Truck Built for Every Job.
Four engines, two transmissions, and a towing ceiling of 13,300 pounds. Choose the powertrain that matches the work.
Standard Power
2.7L TurboMax I4
310 horsepower and 430 lb-ft of torque with an 8-speed automatic. The most fuel-efficient gas engine in the lineup and backed by a 100,000-mile warranty.
V8 Workhorse
5.3L EcoTec3 V8
355 horsepower and 383 lb-ft with Dynamic Fuel Management and a 10-speed automatic. Tows up to 11,500 lbs when properly equipped.
Maximum Gas Power
6.2L EcoTec3 V8
420 horsepower and 460 lb-ft, paired with a 10-speed automatic. Offered with 4WD and standard on the Denali Ultimate.
Best Efficiency
3.0L Duramax Turbo-Diesel
305 horsepower and 495 lb-ft from the inline-six diesel. The efficiency leader at up to 23 city / 28 highway MPG, and rated to tow up to 13,000 lbs.
EPA-Estimated Fuel Economy
Fuel Economy by Engine
2.7L TurboMax
18/22
City / Hwy MPG (2WD)
5.3L V8
16/21
City / Hwy MPG
6.2L V8
15/19
City / Hwy MPG (4WD)
3.0L Duramax
23/28
City / Hwy MPG - Best
EPA-estimated ratings. Figures vary by drivetrain, cab and bed configuration. 4WD typically reduces economy by 1 to 2 MPG. Use for comparison purposes only; your actual mileage will vary.
Cabin Technology
A 13.4-Inch Touchscreen With Google Built-In
The 2026 Sierra puts a 13.4-inch diagonal premium GMC Infotainment System with Google built-in at the center of the cabin on SLE and above, paired with a 12.3-inch digital driver display. Wireless Apple CarPlay and Android Auto are standard, and the Pro trim carries a 7-inch touchscreen. The six-function MultiPro tailgate remains a Sierra signature, and available Super Cruise delivers hands-free driving on compatible highways.
Available Colors
2026 GMC Sierra 1500 Exterior Colors
Summit White
Glacier White Tricoat
Onyx Black
Cardinal Red
Volcanic Red Tintcoat
Coastal Dune
Sterling Metallic
Downpour Metallic
Color availability varies by trim. See dealer for complete availability.
Interior Color Options
2026 Sierra 1500 Interior Colors by Trim
Interior colorways on the 2026 Sierra 1500 are tied to trim level, moving from durable Jet Black vinyl on the Pro to full-grain leather on the Denali Ultimate. Material and colorway availability varies by cab configuration and seat selection.
Jet Black
Pro, SLE, Elevation, SLT, Denali
Dark Walnut / Slate
SLT
Jet Black w/ Kalahari
AT4
Obsidian Rush
AT4X
Atmosphere / Brownstone
Denali
Alpine Umber
Denali Ultimate
Swatches are approximate on-screen representations and will not match the finished material exactly. Interior availability varies by trim and may be limited by exterior color, seating configuration and package selection. See dealer for in-stock combinations.
Lawton Customer Feedback
What Lawton Truck Buyers Are Saying
The Duramax diesel is the right call for the miles I put on across southwest Oklahoma. Real-world economy has been excellent and the torque makes towing effortless.
- Lawton, OK Sierra Owner
Southwest Buick GMC walked me through all eight trims with zero pressure. I ended up in an AT4 and the factory lift and skid plates have already earned their keep.
- Comanche County Driver
The 13.4-inch screen with Google built-in is genuinely better than what I had in my last SUV. The MultiPro tailgate gets used every single week.
- Southwest Buick GMC Customer
Service Department and Parts Center
Certified GMC Service and Genuine Parts for Your Sierra 1500
Our GMC-certified technicians and dedicated parts team keep your 2026 Sierra 1500 running at Professional Grade standards, whether you chose the TurboMax four-cylinder, either EcoTec3 V8, or the Duramax diesel.
Service Department
Factory-Trained GMC Technicians
- Oil, filter and multi-point inspection service
- Duramax diesel service including DEF and fuel system
- 8-speed and 10-speed automatic transmission service
- Dynamic Fuel Management diagnostics on V8 models
- 4WD, AT4 and AT4X suspension and driveline service
- Super Cruise and driver-assist camera calibration
- Tire rotation, balancing and alignment
- MultiPro tailgate adjustment and repair
Parts Center
Genuine GMC Parts and Sierra Accessories
- Genuine GMC and ACDelco replacement parts
- Bed liners, tonneau covers and bed dividers
- Assist steps and running boards
- All-weather floor liners and cargo organizers
- Trailering equipment and hitch hardware
- MultiPro tailgate accessories and work surfaces
- Wheels, all-terrain tires and AT4 off-road components
Genuine GMC parts are engineered to factory tolerances and help protect your Sierra warranty coverage. Contact our parts department for fitment on your specific cab, bed and trim configuration.
Common Questions
2026 Sierra 1500 Questions
What engines are available on the 2026 GMC Sierra 1500?
Four engines are offered: the 2.7L TurboMax four-cylinder (310 hp / 430 lb-ft) with an 8-speed automatic, the 5.3L EcoTec3 V8 (355 hp / 383 lb-ft), the 6.2L EcoTec3 V8 (420 hp / 460 lb-ft), and the 3.0L Duramax turbo-diesel inline-six (305 hp / 495 lb-ft). The V8s and diesel use a 10-speed automatic.
How much can the 2026 Sierra 1500 tow?
Up to 13,300 pounds when properly equipped. The 5.3L V8 is rated to about 11,500 pounds, the 2.7L TurboMax to roughly 9,600 pounds, and the 3.0L Duramax diesel to 13,000 pounds.
What size is the touchscreen in the 2026 Sierra 1500?
SLE trims and above feature a 13.4-inch diagonal premium GMC Infotainment System with Google built-in, paired with a 12.3-inch digital driver display. The Pro trim uses a 7-inch touchscreen. Wireless Apple CarPlay and Android Auto are standard.
Which 2026 Sierra engine gets the best fuel economy?
The 3.0L Duramax turbo-diesel leads the lineup at an EPA-estimated 23 MPG city and 28 MPG highway in two-wheel drive. The 2.7L TurboMax is the most efficient gas option at 18 city / 22 highway.
Where can I find a 2026 GMC Sierra 1500 in Lawton, OK?
Southwest Buick GMC in Lawton carries the full 2026 Sierra 1500 lineup. Browse inventory online or visit our showroom to schedule a test drive.
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Southwest Buick GMC in Lawton, OK has the complete 2026 Sierra 1500 lineup ready for a test drive.
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*Photos may not represent actual vehicle (options, colors, trim, and body styles may vary). All pricing and details are believed to be accurate; however, we do not warranty or guarantee such accuracy. The Manufacturer's Suggested Retail Price and Southwest Price includes $499 doc fee and excludes tax, title, license, dealer fees, optional equipment, and non-optional equipment. Specifications, descriptions, pricing, and equipment are subject to change without notice. Dealer sets final price. Call or email for complete information. MPG is calculated by EPA estimate. Actual mileage may vary. Vehicles may be subject to open safety recalls. Please check this vehicle's recall status at www.nhtsa.gov/recalls
The Manufacturer's Suggested Retail Price excludes tax, title, license, dealer fees and optional equipment. Dealer sets final price.