The 2025 GMC Sierra 2500HD is a BEAST on the road. It’s hard to miss it, easy to spot with the bold presence it brings to the road, job site, field, and campsite. There’s so many ways to utilize the Sierra HD, but even more ways to sit back and enjoy the ride here. At Lighthouse, we like the best of both worlds. Let’s dive in!
2025 GMC Sierra HD Towing Capacity
When choosing a Sierra HD, the engine under the hood makes the biggest change in towing performance. Here’s how the gas engine compares to the diesel engine when deciding which truck will give you the towing capacity you need –
6.6L V8 Gasoline
- Conventional (Ball Hitch): 14,500 – 16,000 lbs.
- 5th Wheel / Gooseneck: 18,200 – 18,700 lbs.
What can change this range?
- Cab Style & Bed Length: Regular Cabs tend to offer the highest tow ratings, while Double and Crew Cabs can be slightly lower due to added weight.
- Drive Type: 2WD models usually tow a little more than 4WD because they’re lighter.
- Trim Packages: AT4, AT4X, and Denali models may have reduced capacities compared to standard trims due to off-road hardware or added luxury features.
Duramax 6.6L Turbo-Diesel V8
- Conventional (Ball Hitch): 14,500 – 20,000 lbs.
- 5th Wheel / Gooseneck: 17,700 – 22,390 lbs.
What affects the range?
- Cab Style & Bed Length: Just like the gas engine, Regular Cab Long Beds are usually at the top of the towing spectrum.
- Drive Type: 2WD versions typically offer higher tow ratings than 4WD.
- Trim Packages:
- NHT (Max Tow) Package boosts capacities significantly, pushing ball hitch ratings up to 20,000 lbs. and gooseneck up to 22,390 lbs.
- Off-Road (AT4, AT4X, AEV) and luxury trims (Denali, Denali Ultimate) often reduce max towing slightly because of added weight and equipment.
Key takeaways
- The Gas V8 engine tops out just under 19,000lbs max towing capacity.
- The Duramax Diesel has the highest pulling power, especially with the NHT Max Tow Package, topping out at 22,000 lbs.
- When deciding between trims and engines, keep in mind, the cab/bed configuration, drive type, and trim package all factor into the max towing capacity.
| Engine | Hitch Type | Towing Range | What Influences It |
|---|---|---|---|
| 6.6L V8 Gasoline | Conventional (Ball Hitch) | 14,500 – 16,000 lbs. | Cab/bed size, 2WD vs. 4WD, trim weight |
| 5th Wheel / Gooseneck | 18,200 – 18,700 lbs. | Cab/bed size, drivetrain, trim (AT4/Denali slightly lower) | |
| 6.6L Duramax Turbo-Diesel V8 | Conventional (Ball Hitch) | 14,500 – 20,000 lbs. | Cab/bed size, 2WD vs. 4WD, trim weight, NHT Max Tow Package |
| 5th Wheel / Gooseneck | 17,700 – 22,390 lbs. | Cab/bed size, drivetrain, off-road or luxury trims may reduce, NHT boosts max capacity |
We hope this has been a great resource for towing capacity, but if there’s any further questions you have, our sales team in Morton, IL is willing and equipped to answer your questions.
Further, if you’re ready to view our Sierra HD collection here at Lighthouse, check it out here. We have a great selection and are the Sierra HD for Bloomington, Peoria, Lacon, Lincoln, and the Central Illinois area! Don’t miss out, experience the Lighthouse Difference Today.
2025 GMC Sierra HD Tech
Now that you’ve found the right engine and options for your towing needs, now it’s time to get comfortable in your Sierra HD. Here’s the best of the tech in the 2025 GMC Sierra HD –
- Up to 14 Available Camera Views, including transparent trailer view
- Available best-in-class 16-way power front seats with massage feature
- Available adapative Cruise Control with Trailering
- Best-in Class crew cab front head and leg room
- 13.4” Diagonal Center Touchscreen
- 15” diagonal multicolor head-up display
- 12.3” diagonal color drive information center
- 6-function Multipro tailgate
- Sierra HD Pro Safety Features like Forward Collision Alert, Lane Departure Warning, Front Pedestrian Braking, Automatic Emergency Braking, and so many more!
With all of the technology, there’s lots of other accessories you’re probably looking to add onto your Sierra HD from Lighthouse in Morton, IL. Are you ready to accessorize your truck? Let’s get started with these standard, frequently-added accessories to your truck –
- Assist Steps/Running Boards
- Truck Bed Covers
- Blacked-out or Illuminated Emblems
- Trailering Products
- Exterior Mirror Covers
View all available accessories in the truck shop – https://accessories.gmc.com/categories/truck-shop