2026 GMC Sierra 3500 HD Exterior Dimensions

The latest GMC Sierra 3500 HD offers several body styles and customization options designed to handle the toughest jobs in Maricopa County. We offer a GMC Sierra 3500 HD Regular Cab and Crew Cab wheelbase comparison, along with an in-depth look at its additional exterior dimensions below. That way, we can show Peoria drivers exactly what they can expect from the latest heavy-duty model before visiting our showroom.

2026 GMC Sierra 3500 HD Regular Cab vs. Crew Cab Wheelbase Comparison

Whether you want to prioritize tailgate space for hauling equipment to Phoenix or be able to bring as many passengers as possible, you’ll be able to customize this pickup truck exactly how you want it. The wheelbase is a critical factor in towing stability and ride quality. Here are the GMC Sierra 3500 HD Regular Cab and Crew Cab wheelbase comparisons:

• Regular Cab Wheelbase: 141.5 inches
• Crew Cab Wheelbase: 159–172 inches

2026 GMC Sierra 3500 HD Double Cab Wheelbase

Glendale drivers who want something in the middle—prioritizing both passenger comfort and nimble maneuvering—might consider the GMC Sierra 3500 HD Double Cab option. This configuration offers a balanced wheelbase that is perfect for those who frequently transition between the job site and daily commutes.

• Double Cab Wheelbase: 162.5 inches

Before you commit to a configuration, check your trade-in value with our Instant Cash Offer tool to see how much you can put toward your new heavy-duty upgrade.

2026 GMC Sierra 3500 HD Long Bed vs. Standard Bed Dimensions

Regardless of which body style you choose, you’ll have the option of a standard bed or a long bed. Whichever option you choose, you’ll have plenty of room to haul your heavy-duty items around Sun City and beyond. Dimensions for the cargo boxes include:

• Standard Bed: 6 feet 9 inches
• Long Bed: 8 feet

2026 GMC Sierra 3500 HD MultiPro™ Tailgate & Height Specs

One of the highlights of the GMC Sierra 3500 HD is the MultiPro™ Tailgate, which makes traveling, working, loading, and unloading significantly easier. This innovative system offers six distinct functions to improve productivity. Take a look at the MultiPro™ Tailgate features as well as the additional dimensions of the GMC Sierra 3500 HD:

MultiPro™ Tailgate Features

• Hitch area lighting and power lock/release
• Key fob power release to open/close the primary gate
• Load stop to help prevent items from sliding out of the bed
• Fold-down inner gate for easy access when loading and unloading
• Inner gate that folds into a full-width step (375 lbs capacity)
• Inner gate load stop for second-tier items
• Available integrated MultiPro™ Tailgate Audio System by KICKER®

Additional Exterior Dimensions & Ground Clearance

• Ground Clearance (Single Rear Wheel): 11.1–11.2 inches
• Ground Clearance (Dual Rear Wheel): 10.4–10.5 inches
• Overall Length (Crew Cab): 250.8–266.8 inches
• Overall Length (Double Cab): 257.2 inches
• Overall Length (Regular Cab): 236.3 inches
• Height (Crew Cab): 80.87–81.2 inches
• Height (Double Cab): 80.87 inches
• Height (Regular Cab): 80.94 inches

Test-Drive A GMC Sierra 3500 HD in Peoria!

If you’d like a more detailed GMC Sierra 3500 HD Regular Cab and Crew Cab wheelbase comparison or have any additional questions about which configuration fits your Scottsdale garage, visit Liberty GMC, Inc.. Our team is ready to help you apply for financing and explore our current new vehicle specials to ensure you get the best deal possible. Visit us today in Peoria to experience the power and scale of the Sierra 3500 HD in person!