Key Takeaways
- The 2026 GMC Sierra 3500 lineup spans six trims, from the work-ready PRO to the luxury Denali Ultimate.
- Available engines include a 6.6L V8 gas with 10-speed automatic and the Duramax 6.6L Turbo-Diesel V8 with 10-speed automatic.
- Higher trims layer in tech and comfort, including the 13.4-inch touchscreen, ProGrade® Trailering System, and 12-Speaker Bose Premium Series audio.
Heavy-duty capability meets premium refinement in the 2026 GMC Sierra 3500 lineup. Designed to handle demanding workloads while delivering modern technology and comfort, this powerful pickup offers a trim level for nearly every type of driver. Whether towing, hauling, or commuting near San Antonio, the Sierra 3500 delivers strength backed by advanced engineering. When you’re ready to upgrade, you can apply for financing online at Gunn Buick GMC to begin your journey toward owning a new Sierra 3500.
2026 GMC Sierra 3500 Configurations & Amenities
The 2026 GMC Sierra 3500 is available in multiple configurations, each offering distinct amenities and performance enhancements. From work-ready functionality to premium luxury appointments, the lineup progresses in capability and refinement as you move through the trims. Below is a closer look at what each trim level brings to the road.
GMC Sierra 3500 PRO
The PRO trim is built for dependable performance and essential functionality.
- 6.6L V8 gas engine with 10-speed automatic transmission
- Trailering Package, Trailering Mirrors, and Trailer Brake Controller
- Best-in-class HD cargo bed volume
- Wireless Apple CarPlay® and wireless Android Auto™ compatibility
- Duramax 6.6L Turbo-Diesel V8 engine with 10-speed automatic transmission
- Adaptive Cruise Control with trailering
GMC Sierra 3500 SLE
The SLE adds upgraded technology and interior conveniences.
- 13.4-inch diagonal center touchscreen
- 12.3-inch diagonal digital Driver Information Center
- Traction Select System with Tow/Haul mode
- 17-inch machined aluminum wheels
- Up to 13 camera views
- Transparent trailer view
- MultiPro Tailgate and MultiPro Tailgate Audio System by Kicker®
- X31 off-road package with twin-tube Rancho® shocks and skid plates
What trim levels are available for the 2026 GMC Sierra 3500?
The 2026 GMC Sierra 3500 is offered in six trims: PRO, SLE, SLT, AT4, Denali, and Denali Ultimate, ranging from work-ready capability to top-tier luxury.
GMC Sierra 3500 SLT
The SLT blends heavy-duty performance with premium comfort.
- 10-way power driver and front outboard passenger heated seats with lumbar
- Heated steering wheel
- ProGrade® Trailering System with In-Vehicle Trailering App
- 18-inch machined aluminum wheels with dark grey metallic accents
- 10-way power-adjustable front heated and ventilated bucket seats with perforated leather appointments
- MultiPro Tailgate and MultiPro Tailgate Audio System by Kicker®
GMC Sierra 3500 AT4
The AT4 trim enhances off-road capability and rugged styling.
- Exclusive Jet Black interior with Kalahari accents, and heated and ventilated perforated front leather seating surfaces
- Exclusive 20-inch gloss-black aluminum wheels with available BFGoodrich® off-road tires
- Off-Road Suspension Package with twin-tube Rancho shocks and skid plates
- Up to 14 available camera views with HD Surround Vision
- Adaptive Cruise Control with trailering
- 15-inch diagonal Head-Up Display with off-road inclinometer
Drivers traveling through Schertz will appreciate the confidence the AT4 brings to challenging terrain.
GMC Sierra 3500 Denali
The Denali trim delivers signature luxury and advanced technology.
- 20-inch Ultra-Bright machined aluminum wheels with bright chrome inserts
- Denali-exclusive authentic wood, patterned aluminum trim, and Forge perforated leather seating surfaces
- 12-way heated and ventilated power front seats
- Duramax 6.6L Turbo-Diesel V8 engine with 10-speed automatic transmission
- Power sunroof
- Rear Camera Mirror
GMC Sierra 3500 Denali Ultimate
At the top of the lineup, the Denali Ultimate offers elevated craftsmanship and innovation.
- Duramax 6.6L Turbo-Diesel V8 engine with 10-speed automatic transmission
- Signature Vader Chrome grille and exclusive 20-inch Ultra-Bright machined aluminum wheels with gloss-black inserts
- Exclusive Alpine Umber interior featuring full-grain leather seating, authentic Paldao wood, and 16-way power front seats with massage feature
- 12-Speaker Bose Premium Series with Centerpoint surround sound
- Illuminated power assist steps and MultiPro Tailgate Audio System by KICKER®
Whether working hard or cruising comfortably near Cibolo, the Denali Ultimate represents the pinnacle of Sierra 3500 refinement.
Explore The 2026 GMC Sierra 3500 Trim Levels At Gunn Buick GMC
From jobsite-ready capability to first-class luxury, the 2026 GMC Sierra 3500 trim levels offer a configuration tailored to your needs. Trade in your current vehicle to apply its value toward your new purchase and explore our new vehicle specials for exclusive offers. Visit Gunn Buick GMC to discover available inventory, compare trims in person, and experience the strength and sophistication of the Sierra 3500 firsthand.
