New 2027 GMC Sierra 1500 For Sale Near Duncan, OK
Southwest Buick GMC - Serving Duncan, OK
Find a New 2027 GMC Sierra 1500 Near Duncan, OK
Duncan area truck buyers looking for the most capable and technologically advanced Sierra ever built will find the fully redesigned 2027 model at Southwest Buick GMC, a short drive away.
16.3"
Center Touchscreen
4
Available Engines
6
Distinct Trim Levels
10spd
Automatic Trans.
Serving Duncan and Stephens County
Why Stephens County Drivers Are Choosing the Redesigned 2027 Sierra
The 2027 GMC Sierra 1500 brings the most significant redesign in the model's history to Duncan-area buyers. Two all-new sixth-generation Small Block V8 engines debut alongside the class-exclusive 3.0L Duramax Diesel, which is confirmed to exceed the fuel efficiency of every hybrid truck competitor at highway speeds.
Southwest Buick GMC serves the Duncan community with a team that knows every Sierra trim, engine, and package inside and out. Whether you are looking for the diesel for long Stephens County highway runs or the Denali Ultimate for flagship comfort, we will help you configure the right truck.
Apply for financing online from home, then visit our showroom to experience the 2027 Sierra firsthand.
Trim Lineup
Every 2027 GMC Sierra 1500 Trim - Compared and Explained
Six focused configurations for 2027, each with a distinct character. The former SLE and SLT do not return.
Pro
Work-ready foundation with the enhanced 2.7L TurboMax, 16.3-inch articulating touchscreen, wireless Apple CarPlay and Android Auto, and the new MultiPro center console that folds flat into a work surface.
Elevation
Blacked-out sport styling with an exclusive After Dark interior theme, dark exterior trim, and a distinctly aggressive presence that stands apart from the standard Sierra lineup.
Off-Road
AT4
Off-road-tuned suspension, standard underbody skid plates, hill descent control, and an exclusive Forest Storm interior with Alpine Lake accent stitching. Real off-road performance.
Extreme Off-Road
AT4X
Maximum off-road hardware, standard panoramic sunroof, exclusive Timber Mahogany interior, and available AEV Edition Package for drivers who need extreme terrain capability.
Luxury
Denali
Three exclusive interior colorways, open-pore real wood trim, available Super Cruise with Trailering, and a cabin that sets a new benchmark for full-size truck luxury.
Flagship
Denali Ultimate
The Sierra pinnacle: Stealth Black and Bright White interior, forged wood trim, standard Super Cruise with Trailering, and every available technology feature standard.
Choose Your Power
All Four 2027 Sierra 1500 Powertrain Options
Two all-new sixth-generation Small Block V8s debut alongside the enhanced TurboMax and class-exclusive Duramax Diesel.
Standard Power
2.7L TurboMax 4-Cyl
Enhanced turbocharged 4-cylinder with improved output, paired with a 10-speed automatic for smooth and efficient everyday driving.
New Generation
5.7L Small Block V8
All-new sixth-generation small block V8 delivering improved performance and durability over the outgoing engine generation.
Maximum Power
6.6L Small Block V8
The most powerful naturally aspirated V8 in the light-duty truck class. Built for maximum towing and the heaviest hauling demands.
Best Efficiency
3.0L Duramax Diesel
Class-exclusive turbodiesel confirmed to outperform hybrid truck competitors on the highway. Best fuel efficiency in the Sierra lineup.
Digital Command Center
An Interior Unlike Any Truck Before It
The 16.3-inch articulating center touchscreen is the largest in the full-size truck class - with hidden storage behind it. Paired with a 12.2-inch driver display and an available 11.5-inch passenger screen, the Sierra delivers over 60 inches of digital real estate. An available 15-inch head-up display adds more. Available Super Cruise with Trailering provides hands-free highway driving and the industry's first hands-free towing on select trims.
Exterior Palette
Seven Available Exterior Colors for 2027
Seven exterior colors for 2027, including three new finishes. Color availability varies by trim level.
Summit White
Onyx Black
Sterling Metallic
Quicksilver
Cayenne Red
Downpour Blue
Volcanic Ash
What Duncan-Area Customers Are Saying
Trusted Across Stephens County
“
The AT4X is a completely different truck from anything I have owned before. The Timber Mahogany interior with the panoramic sunroof and that off-road hardware is genuinely impressive.
- Duncan Area Truck Buyer
“
Southwest Buick GMC walked me through all six trims without any pressure. The Duramax numbers are exactly what I needed for my long highway hauls across the region.
- Stephens County, OK Driver
Service Department and Parts Center
Certified GMC Service and Genuine Parts for Your Sierra 1500
Buying the truck is only the beginning. Our GMC-certified service department and dedicated parts center keep your 2027 Sierra 1500 running at Professional Grade standards for as long as you own it.
Service Department
GMC-Certified Service and Maintenance
Our factory-trained technicians are equipped for every system on the redesigned 2027 Sierra, including the new sixth-generation V8 engines and the class-exclusive Duramax diesel.
- Oil, filter changes and multi-point inspections
- Duramax diesel service including DEF and fuel system
- 10-speed automatic transmission service
- Brake, suspension and 4WD system diagnostics
- Tire rotation, balancing and alignment
- Super Cruise and driver-assist camera calibration
- Battery testing and electrical diagnostics
Parts Center
Genuine GMC Parts and Sierra Accessories
We stock Genuine GMC and ACDelco parts engineered specifically for the Sierra 1500, plus the accessories that make your truck work harder.
- 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
- Wheels, tires and off-road AT4 components
Genuine GMC parts are engineered to factory tolerances and help protect your Sierra warranty coverage. Contact our parts department for availability and fitment on your specific trim.
Have Questions?
Questions from Duncan-Area Sierra Shoppers
Is the 2027 GMC Sierra 1500 available with a diesel engine?
Yes. The class-exclusive 3.0L Duramax Turbo-Diesel Inline-6 returns for 2027 and is confirmed to outperform hybrid truck competitors on fuel efficiency at highway speeds.
What makes the Elevation trim unique?
The Elevation brings blacked-out sport exterior styling with an exclusive After Dark interior colorway, distinct from the work-focused Pro below it and the off-road AT4 above.
Does the 2027 Sierra include wireless Apple CarPlay?
Yes. Wireless Apple CarPlay and Android Auto are standard across all six 2027 Sierra 1500 trim levels.
Where can I find a 2027 GMC Sierra 1500 near Duncan, OK?
Southwest Buick GMC serves Duncan and all of Stephens County. Browse inventory online or visit our showroom to schedule a test drive.
What is the AEV Edition Package on the Sierra AT4X?
The AEV Edition Package adds specially engineered components from American Expedition Vehicles for buyers who need the maximum possible off-road capability from the Sierra AT4X.
Apply for Financing
Pre-approve online before you visit. Competitive rates, all credit types considered.
Apply NowSchedule Service
Factory-certified GMC technicians. Online scheduling. Professional Grade care every time.
Schedule NowOrder OEM Parts
Genuine GMC parts ordered through our dedicated parts center. Fast, accurate fulfillment.
Order PartsYour New Sierra Awaits Near Duncan
Southwest Buick GMC serves Duncan and Stephens County with the complete 2027 GMC Sierra 1500 lineup. Visit us or apply for financing online today.
Browse Inventory Get Pre-Approved
*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.
The Manufacturer's Suggested Retail Price excludes tax, title, license, dealer fees and optional equipment. Dealer sets final price.