2026 GMC Sierra 1500 Interior Dimensions & Features

You can tow and haul just about anything with your GMC Sierra 1500, thanks to its hefty towing capabilities and spacious bed dimensions. But how much space will you have inside the cabin? It depends on whether you opt for a Regular Cab, Double Cab, or Crew Cab. In this 2026 GMC Sierra 1500 interior overview, Lochmandy Motor Sales breaks down the GMC Sierra 1500 dimensions for each cab style. Plus, we’ll offer a glimpse at the premium amenities and high-tech interior features that will make your drives throughout the South Bend area easier and more enjoyable.

2026 GMC Sierra 1500 Dimensions By Cab Style

You’ll need to choose from 3 cab types when building your new Sierra 1500. To help guide your decision, consider how many passengers you’ll carry around Mishawaka. The Regular Cab has a 3-passenger capacity, while the Double Cab comfortably seats 6 occupants. Finally, the Crew Cab can accommodate 5 or 6 passengers, depending on the configuration.

Explore the detailed GMC Sierra 1500 dimensions among the various cab and bed combinations to see what suits your needs:

Regular Cab, Standard Bed

Trims: Pro (2WD/AWD)

• Seating Capacity: 3 passengers
• Headroom (Front): 43.11 inches
• Legroom (Front): 44.53 inches
• Shoulder Room (Front): 66.02 inches
• Hip Room (Front): 60.90 inches

Regular Cab, Long Bed

Trims: Pro (2WD/AWD)

• Seating Capacity: 3 passengers
• Headroom (Front): 43.11 inches
• Legroom (Front): 44.53 inches
• Shoulder Room (Front): 66.02 inches
• Hip Room (Front): 60.90 inches

Double Cab, Standard Bed

Trims: Pro (2WD/AWD), SLE (2WD/AWD), Elevation (2WD/AWD)

• Seating Capacity: 6 passengers
• Headroom (Front/Rear): 43.03 inches / 39.88 inches
• Legroom (Front/Rear): 44.53 inches / 35.24 inches
• Shoulder Room (Front/Rear): 66.02 inches / 64.88 inches
• Hip Room (Front/Rear): 61.18 inches / 60.24 inches

Crew Cab, Short Bed

Trims: Pro (2WD/AWD), SLE (2WD/AWD), Elevation (2WD/AWD), SLT (2WD/AWD), AT4 (4WD only), AT4X (4WD only), Denali (2WD/AWD), Denali Ultimate (4WD only)

• Seating Capacity: 6 passengers
• Headroom (Front/Rear): 43.03 inches / 40.12 inches
• Legroom (Front/Rear): 44.53 inches / 43.40 inches
• Shoulder Room (Front/Rear): 66.02 inches / 65.16 inches
• Hip Room (Front/Rear): 61.18 inches / 60.24 inches

Crew Cab, Standard Bed

Trims: Pro (2WD/AWD), SLE (2WD/AWD), Elevation (2WD/AWD), SLT (2WD/AWD), AT4 (4WD only), Denali (2WD/AWD)

• Seating Capacity: 5 passengers
• Headroom (Front/Rear): 43.03 inches / 40.12 inches
• Legroom (Front/Rear): 44.53 inches / 43.40 inches
• Shoulder Room (Front/Rear): 64.54 inches / 64.00 inches
• Hip Room (Front/Rear): 60.78 inches / 59.24 inches

2026 GMC Sierra 1500 Interior Features

Your Sierra 1500 becomes a mobile office with helpful technology, including a Wi-Fi® hotspot and seamless phone integration. When you’re on the road in Granger, you’ll also enjoy premium appointments to keep you comfortable. Here’s a closer look at the highlights you’ll encounter inside the 2026 GMC Sierra 1500:

• 4-way manual front seats
• 7-inch diagonal color touchscreen
• Bluetooth® audio streaming for select devices
• Apple CarPlay® and Android Auto™ capability for compatible phones
• Wi-Fi® hotspot capability
• 3.5-inch diagonal monochromatic Driver Information Center
• And more

While these features come standard in the base model, opting for upper-level Sierra 1500 trims unlocks additional upgrades, such as heated seats, wireless Apple CarPlay® and Android Auto™, a 13.4-inch diagonal GMC Premium Infotainment System with Google built-in, and more.

Climb Inside The GMC Sierra 1500 At Lochmandy Motor Sales

You can compare cab options and explore more interior features at our GMC dealership in Elkhart. Contact us to schedule an appointment or visit us during our flexible hours. When you’re ready to upgrade, our new vehicle specials can help you lock in a competitive price.