2026 GMC Sierra 1500 Interior Dimensions & Features

The GMC Sierra 1500 is world-renowned for its hefty towing capabilities and rugged performance, but the 2026 model proves that a workhorse can also be a luxury sanctuary. Whether you are navigating the job site in Bettendorf or taking the family across the Quad Cities, your comfort depends on choosing the right cab style. In this 2026 GMC Sierra 1500 interior overview, Green Buick GMC breaks down the dimensions for the Regular Cab, Double Cab, and Crew Cab configurations.

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2026 GMC Sierra 1500 Dimensions By Cab Style

To determine which cab suits your Rockwell City lifestyle, consider how often you’ll be carrying passengers. While the Regular Cab is a focused work tool, the Crew Cab offers “living room” levels of space for the whole crew. Explore the detailed dimensions below and see how the Sierra compares in our 2026 Sierra 1500 research guide.

Regular Cab (Pro Trim)

• Seating Capacity: 3 passengers
• Headroom (Front): 43.11 inches
• Legroom (Front): 44.53 inches
• Shoulder Room (Front): 66.02 inches

Double Cab (Pro, SLE, Elevation)

• Seating Capacity: 6 passengers
• Headroom (Front/Rear): 43.03 / 39.88 inches
• Legroom (Front/Rear): 44.53 / 35.24 inches
• Shoulder Room (Front/Rear): 66.02 / 64.88 inches

Crew Cab (All Trims)

• Seating Capacity: 5 or 6 passengers
• Headroom (Front/Rear): 43.03 / 40.12 inches
• Legroom (Front/Rear): 44.53 / 43.40 inches
• Shoulder Room (Front/Rear): 66.02 / 65.16 inches

2026 GMC Sierra 1500 Interior Tech & Amenities

For the 2026 model year, the Sierra 1500’s interior doubles as a mobile office. New software updates bring expanded video streaming capabilities to the dashboard, allowing you to pass the time while parked with apps like YouTube and Prime Video. Key interior highlights include:

• 13.4-inch Diagonal Touchscreen: Available on SLE and above, featuring Google built-in for seamless navigation and voice commands.
• Super Cruise™: Available hands-free driver assistance technology for compatible highways.
• ProGrade™ Trailering: Up to 14 available camera views, including a transparent trailer view, integrated directly into the infotainment display.
• Denali Ultimate Luxury: Experience Alpine Umber leather, authentic open-pore wood, and 16-way power-massaging front seats.

Be sure to consult our GMC maintenance schedule to keep these high-tech systems running perfectly for years to come.

Experience the Sierra 1500 in Davenport, IA

Ready to climb inside the most advanced GMC truck yet? Visit Green Buick GMC in Davenport to explore our new Sierra 1500 inventory. Before you stop by, value your trade online and check our new vehicle specials to save on your next purchase. Join our community on Facebook for the latest Quad Cities automotive news!