2026 GMC Sierra 3500 HD Overview

The GMC Sierra 3500 HD is known for its breathtaking power and durability, and the latest model is no exception. In our extensive overview, we cover everything Allentown drivers need to know about the 2026 model. We encourage drivers to review our guide of the 2026 GMC Sierra 3500 HD before taking it for a test drive at our dealership!

2026 GMC Sierra 3500 HD Trims

The 2026 model offers Lehigh Valley drivers a wide variety of configurations to choose from. Each configuration has its own set of features and capabilities, and we’ve listed some highlights below:

PRO

• 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

SLE

Includes PRO key standard features, plus: 

• 13.4-inch diagonal center touchscreen and 12.3-inch diagonal digital Driver Information Center
• Traction Select System with Tow/Haul mode
• 17-inch machined aluminum wheels

SLT

Includes SLE key standard features, plus: 

• 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

AT4

Includes SLT key standard features, plus: 

• 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

Denali

Includes SLT key standard features, plus: 

• 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

When shopping for your preferred trim, you can use our vehicle finder tool to narrow your search by certain features or amenities.

2026 GMC Sierra 3500 HD Engines

There are two powerful engine options that this pickup truck has to offer, and either engine has more than enough power to help you take on anything the roads of Lansdale can throw at you. See what both engines are capable of:

Standard 6.6L V8 Gas Engine

• Up to 401 hp
• Up to 464 lb-ft of torque
• 10-speed automatic transmission

Available 6.6L Duramax Turbo-Diesel V8 Engine

• Up to 470 hp
• Up to 975 lb-ft of torque
• 10-speed automatic transmission

Schedule a test drive of the GMC Sierra 3500 HD at Star GMC Quakertown to get a closer glimpse of what it can do!

2026 GMC Sierra 3500 HD Towing & Payload Capacities

The GMC Sierra 3500 HD offers a class-leading towing capacity of up to 36,000 pounds, which will help you tow and haul whatever you need around Bethlehem without breaking a sweat!

• Maximum towing capacity of 36,000 pounds
• Maximum payload capacity of 7,290 pounds

2026 GMC Sierra 3500 HD Dimensions

To give you an idea of how much ground clearance and cargo space you’ll have, see the key dimensions of the GMC Sierra 3500 HD:

• Ground Clearance: 10.4–11.2 inches

• Wheelbase: 141.5–172 inches

• Cargo Volume: 69.5–83.5 cubic feet

• Length: 236.3–266.8 inches

Test-Drive A GMC Sierra 3500 HD Pickup Truck In Quakertown!

Experience everything the GMC Sierra 3500 HD has to offer when you visit Star GMC Quakertown. We’ll guide you toward a model that has what you’re looking for, and our new vehicle specials will help you save significantly on your next purchase or lease!