Compare 2026 GMC Sierra 1500 Trim Levels in Brookfield, WI

Blending robust capability with upscale comfort and advanced technology, the GMC Sierra 1500 remains one of the most versatile full-size trucks on the road. From dependable job-site performance to refined daily driving manners, the Sierra 1500 offers a broad range of configurations to suit many different lifestyles and workloads.

For 2026, the GMC Sierra 1500 returns largely unchanged apart from a few subtle updates. Two new exterior colors, Glacier White Tricoat and Coastal Dune, join the palette, replacing White Frost Tricoat and Thunderstorm Gray. Meanwhile, models equipped with the available 6.2-liter V8 now feature a more pronounced exhaust tone while driving in Sport mode.

Drivers from Glendale to Greenfield, WI, can buy or lease a new 2026 Sierra 1500 here at Mike Juneau's Brookfield Buick GMC. To help find the configuration that best suits your needs, here's a look at some of the key highlights of each trim.

GMC Sierra 1500 Powertrain Options

Four engine options are available to power the 2026 Sierra 1500, including:

• 2.7-liter TurboMax™ I-4 (310 horsepower, 430 pound-feet of torque): Standard in Pro, SLE, and Elevation trims. Max tow rating of 9,500 pounds.
• 5.3-liter V8 (355 horsepower, 383 pound-feet): Standard in SLT and Denali trims and available for supporting tiers. Max tow rating of 11,200 pounds.
• 6.2-liter V8 (420 horsepower, 460 pound-feet): Standard in the Denali Ultimate trim and available in AT4, AT4X, SLT, and Denali. Max tow rating: 13,000 pounds.
• 3.0-liter Duramax® I6 (305 horsepower, 495 pound-feet): Standard in AT4 and AT4X trims and available in SLT and Denali models. Max tow rating of 13,200 pounds.

Trim Level Highlights

Pro

The base trim establishes a strong foundation for the Sierra 1500 lineup. It's ideal for  Wauwatosa drivers who want a practical, durable, and capable pickup with a few modern touches at an approachable value.

• LED headlights
• Automatic high beams
• Heated side mirrors
• Easy-to-clean vinyl flooring
• Cloth or vinyl seat upholstery
• 7-inch touchscreen; wireless Apple CarPlay/Android Auto
• Forward Collision Alert, Automatic Emergency Braking
• Front Pedestrian Braking
• Following Distance Indicator
• Lane Departure Warning, Lane Keep Assist

SLE

By stepping up one level, Wauwatosa shoppers can access more comfort and convenience equipment, including more advanced displays, upgraded cabin amenities, and nicer interior materials.

• Auto-locking rear differential
• 17-inch alloy wheels
• LED bed lighting
• MultiPro tailgate
• Keyless entry
• 12.3-inch digital instrument cluster
• 13.4-inch touchscreen
• Power-adjustable driver's seat
• Dual-zone automatic climate control
• Heated front seats and steering wheel
• Rear underseat storage

Elevation

The GMC Sierra 1500 Elevation trim builds on the SLE trim with more assertive styling and improved capability. Highlights include:

• 20-inch alloy wheels
• Single-speed transfer case (with 4WD)
• Increased towing performance
• LED fog lights
• Cloth upholstery

SLT

The SLT trim gives the Sierra 1500 a more premium character, incorporating upgraded materials, enhanced seating comfort, and several convenience-oriented cabin features. It's an attractive option for shoppers seeking a more upscale driving experience without stepping fully into the luxury-oriented trims.

• 18-inch alloy wheels
• Chrome accents
• Rain-sensing wipers
• Power-folding/auto-dimming mirrors
• Leather upholstery
• Driver memory settings
• Power-adjustable front passenger seat

AT4

Designed for enthusiasts who enjoy outdoor adventures, the AT4 trim equips the Sierra 1500 with specialized off-road hardware. Along with enhanced trail capability, it also adds several premium comfort and safety upgrades. A 3.0-liter Duramax® engine comes standard, generating immense torque (495 pound-feet) at just 1,500 rpm while also improving efficiency.

• Four-wheel drive and two-speed transfer case
• Terrain-tuned suspension with two-inch lift
• All-terrain tires
• Recovery hooks
• Skid plates
• Spray-in bed liner
• Ventilated front seats
• Heated rear seats
• Wireless charging pad
• Rear automatic braking
• HD Surround Vision
• Lane Change Alert with Trailer Side Blind Zone Alert

AT4X

The AT4X builds on the AT4 trim with even more off-road-focused hardware, plus numerous premium features and technologies.

• Off-road adaptive suspension dampers
• Front and rear e-lockers
• Sunroof
• Power-sliding rear window
• Bed-view camera
• Digital rearview mirror
• Head-up display
• Adaptive cruise control
• Front/rear parking sensors

Denali

As the GMC brand's signature luxury trim, the Denali elevates the Sierra 1500 with sophisticated styling, premium amenities, and several advanced towing and driver-assistance technologies.

• 20-inch wheels
• Two-speed transfer case (4WD models)
• Adaptive suspension
• Integrated trailer brake controller
• Spray-in bed liner
• Power-retractable steps
• Bed-view camera
• Power-sliding rear window
• Power-adjustable steering column
• Ventilated front seats
• Heated rear seats
• Wireless charging pad
• 7-speaker Bose audio system
• Digital rearview mirror
• Adaptive cruise control
• Front/rear parking sensors
• Available Super Cruise

Denali Ultimate

The range-topping Denali Ultimate trim adds exclusive upscale details and additional premium technologies for shoppers seeking the most luxurious GMC pickup experience available.

• 22-inch wheels
• Carbon-fiber composite bed
• Sunroof
• Head-up display
• 12-speaker Bose audio system
• Available Super Cruise

Test-Drive a New GMC Sierra 1500 near Milwaukee

Reach out to Mike Juneau's Brookfield Buick GMC for more information about the GMC Sierra lineup, including available features, financing offers, and incentives. If you'd like a closer look at the latest GMC trucks in our new vehicle inventory, we invite you to visit us in Brookfield for a test drive. We'll be happy to give you a tour.