2025 GMC Sierra HD Bed Sizes & Payload Capacity

Serious jobs require a heavy-duty truck, like the GMC Sierra HD family of pickups. Whether you choose a Sierra 2500 or Sierra 3500, you will find a configuration that can handle every hauling need. With three cab sizes, two bed lengths, several trim levels, two engine options, two-wheel drive or four-wheel drive, and a choice of single rear wheels or dual rear wheels (3500 only), there is a configuration for every Omaha business or Elkhorn family need.

What are the GMC Sierra HD bed size dimensions, and how much can they carry? Explore the GMC Sierra 2500 bed size and GMC Sierra 3500 bed size dimensions and payload capacity in this guide from the team at Sid Dillon Buick GMC Fremont!

2025 GMC Sierra HD Bed Size: Lengths & Dimensions

The 2025 GMC Sierra 2500 bed size and the 2025 GMC Sierra 3500 bed size options include an 8-foot long bed and a 6.5-foot standard bed. Although not every bed length is available with every cab size, GMC offers the most popular combinations demanded by truck buyers. GMC Sierra 3500 models are also available with dual rear wheels. See the exact dimensions of each 2025 GMC Sierra HD bed size and their cab availability below:

2025 GMC Sierra 2500 Bed Sizes:

Long Bed

Available On: Regular Cab, Double Cab, Crew Cab

• Cargo Box Length @ Floor: 98.27 inches

• Cargo Box Width @ Floor: 71.40 inches

• Cargo Box Width @ Wheelhousings: 50.55 inches

• Cargo Box Height: 21.00 inches

Standard Bed

Available On: Double Cab, Crew Cab

• Cargo Box Length @ Floor: 82.25 inches

• Cargo Box Width @ Floor: 71.40 inches

• Cargo Box Width @ Wheelhousings: 51.85 inches

• Cargo Box Height: 21.00 inches

2025 GMC Sierra 3500 Bed Sizes:

Long Bed

Available On: Regular Cab, Double Cab, Crew Cab

• Cargo Box Length @ Floor: 98.27 inches

• Cargo Box Width @ Floor: 71.40 inches

• Cargo Box Width @ Wheelhousings: 50.55 inches

• Cargo Box Height: 21.00 inches

Standard Bed

Available On: Crew Cab

• Cargo Box Length @ Floor: 82.20 inches

• Cargo Box Width @ Floor: 71.40 inches

• Cargo Box Width @ Wheelhousings: 51.85 inches

• Cargo Box Height: 21.00 inches

How Much Can the 2025 GMC Sierra HD Carry?

The 2025 GMC Sierra HD payload capacity varies by cab and bed combination, trim level option, whether you choose two- or four-wheel drive, and whether you choose a single-rear wheel or dual-rear wheel model. Explore the 2025 GMC Sierra 2500 payload capacity and the 2025 GMC Sierra 3500 payload capacity by configuration below:

2025 GMC Sierra 2500 Payload Capacity:

Regular Cab, Long Bed

Available On: Pro

• 2WD: 3,907 pounds

Available On: Pro, SLE

• 4WD: 3,810 pounds

Double Cab, Standard Bed

Available On: Pro

• 2WD: 3,641 pounds

Available On: Pro, SLE

• 4WD: 3,594 pounds

Double Cab, Long Bed

Available On: Pro

• 2WD: 3,657 pounds

Available On: Pro, SLE

• 4WD: 3,653 pounds

Crew Cab, Standard Bed

Available On: Pro

• 2WD: 3,637 pounds

Available On: Pro, SLE, SLT, AT4, AT4X, Denali, Denali Ultimate

• 4WD: 3,155 – 4,005 pounds

Crew Cab, Long Bed

Available On: Pro

• 2WD: 3,672 pounds

Available On: Pro, SLE, SLT, AT4

• 4WD: 3,714 – 4,114 pounds

2025 GMC Sierra 3500 Payload Capacity:

Regular Cab, Long Bed

Available On: Pro

• 2WD SRW: 4,721 pounds

Available On: Pro

• 2WD DRW: 4,721 pounds

Available On: Pro, SLE

• 4WD SRW: 4,696 pounds

Available On: Pro, SLE

• 4WD DRW: 4,696 pounds

Double Cab, Long Bed

Available On: Pro

• 2WD SRW: 4,612 pounds

Available On: Pro

• 2WD DRW: 4,612 pounds

Available On: Pro, SLE

• 4WD SRW: 4,405 pounds

Available On: Pro, SLE

• 4WD DRW: 4,405 pounds

Crew Cab, Standard Bed

Available On: Pro

• 2WD SRW: 4.721 pounds

Available On: Pro

• 2WD DRW: 4,721 pounds

Available On: Pro, SLE

• 4WD SRW: 4,696 pounds

Available On: Pro, SLE, SLT, AT4, AT4X, Denali, Denali Ultimate

• 4WD DRW: 4,696 pounds

Crew Cab, Long Bed

Available On: Pro

• 2WD SRW: 4,550 pounds

Available On: Pro

• 2WD DRW: 4,550 pounds

Available On: Pro, SLE, SLT, AT4, Denali, Denali Ultimate

• 4WD SRW: 4,421 – 5,171 pounds

Available On: Pro, SLE, SLT, Denali, Denali Ultimate

• 4WD DRW: 4,421 – 5,171 pounds

2025 GMC Sierra HD Engine Options

While the 2025 GMC Sierra HD pickup’s robust frame and chassis contribute to its impressive payload capacity, two powerful V8 engine options help move this heavy-duty truck and its cargo with authority on the streets of Lincoln and Columbus. Explore the specs of each engine option below:

6.6L V8 Engine

• Available On: Pro, SLE, SLT, AT4, Denali, AT4X
• Horsepower: 401 hp
• Torque: 464 lb-ft
• Fuel Tank Capacity: 36 gallons
• Transmission: Automatic, 10-speed

6.6L Duramax V8 Turbo-Diesel Engine

• Available On: Pro, SLE, SLT, AT4, Denali, AT4X, Denali Ultimate
• Horsepower: 470 hp
• Torque: 975 lb-ft
• Fuel Tank Capacity: 36 gallons
• Transmission: Automatic, 10-speed

Test-Drive the 2025 GMC Sierra HD at Sid Dillon Buick GMC Fremont!

Now that you know more about the 2025 GMC Sierra 2500 payload capacity and the 2025 GMC Sierra 3500 payload capacity for each cab and bed size combination, it’s time to explore this remarkable truck firsthand. Contact us today to schedule your test drive in a new GMC Sierra HD at Sid Dillon Buick GMC Fremont! Our team will review all the available configurations and capabilities to ensure we find the best truck for your lifestyle and needs. Get pre-approved for financing online so our finance experts can find the best loan or lease plan for your budget. Explore our new vehicle specials to see how much you can save on your next vehicle!