2025 GMC Sierra 2500 Performance

Denver drivers needing a truck that can handle any job they throw at it know that they can trust the GMC Sierra line of pickups. The 2025 GMC Sierra 2500 engine options provide all the power you need, no matter the job requirements—or if you’re just commuting through Brighton. Below, the team at Transwest GMC explores the 2025 GMC Sierra 2500 specs. Be sure to keep in touch to find out the GMC Sierra 2500 mpg when those figures are available! When you’re ready to take the next step, contact us to schedule your test drive!

GMC Sierra 2500 Engine Options

There are two GMC Sierra 2500 engine options available for 2025. Both boast plenty of horses under the hood and the torque to tow heavy loads—and while the GMC Sierra 2500 mpg hasn’t been released by the EPA yet, you can be sure that it won’t leave you stranded:

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

2025 GMC Sierra 2500 Specs: Towing Capacity

While many specs, like the GMC Sierra 2500 mpg, depend on the engine option you choose for your truck, its towing capacity depends on the truck’s weight—which means cab size. We’ve broken down the relevant 2025 GMC Sierra 2500 specs below:

Crew Cab

• Max Conventional Trailering: 20,000 pounds
• Max Gooseneck/5th-Wheel Trailering: 21,870 pounds
• Max GCWR: 30,000 pounds
• Max Payload: 3,859 pounds

Double Cab

• Max Conventional Trailering: 17,900 pounds
• Max Gooseneck/5th-Wheel Trailering: 18,600 pounds
• Max GCWR: 26,000 pounds
• Max Payload: 3,788 pounds

Regular Cab

• Max Conventional Trailering: 14,500 pounds
• Max Gooseneck/5th-Wheel Trailering: 22,390 pounds
• Max GCWR: 30,000 pounds
• Max Payload: 4,064 pounds

Discover Your GMC Pickup at Transwest GMC Today

When you’re ready to make a new GMC Sierra 2500 your own in Thornton, give us a call at (855) 554-9422 to schedule your visit to our Henderson dealership. We’ll be happy to help you find the pickup of your dreams! In the meantime, explore our new vehicle specials or apply for financing online.