2026 GMC Sierra 2500
Heavy-Duty · Built in Tampa's Backyard
2026 GMC Sierra 2500 HD
975 lb-ft. 22,500 lbs. No Limits.
When the job demands more than a half-ton can deliver, the Sierra 2500 HD steps in. Duramax Diesel with 975 lb-ft of torque. Up to 22,500 lbs of towing. Allison 10-speed transmission. Backed by Century's Exclusive Lifetime Powertrain Warranty.
When the Job Gets
Seriously Heavy
The 2026 GMC Sierra 2500 HD is built for Tampa Bay contractors, business owners, and serious truck buyers who can't afford to compromise. Whether you're hauling a gooseneck trailer across Florida, towing commercial equipment, or managing a work fleet — this truck handles it without breaking a sweat.
Two purpose-built engines — both paired with the legendary Allison 10-speed automatic transmission — deliver the power and control you need. The Duramax 6.6L Turbo-Diesel's 975 lb-ft of torque is the most you can get in a pickup, and the 22,500-lb towing capacity proves it. From the value-focused Pro to the luxury-loaded Denali Ultimate, there's a Sierra 2500 HD for every mission.
Browse Sierra 2500 HD Inventory 975 lb-ft Duramax Diesel Torque The most torque available in any pickup truck — 25% more low-RPM grunt than the previous generation
22,500-lb Max Towing Gooseneck/fifth-wheel rated — built for boats, RVs, horse trailers, and commercial loads
Allison 10-Speed Automatic Standard on all Sierra 2500 HD trims — the most trusted heavy-duty transmission on the market
Up to 13 Camera Views Includes transparent trailer view — so you see through your trailer while backing into tight spaces
Two Engines. One Goal: Maximum Capability.
Gas or diesel — both Sierra 2500 HD engines are paired with the Allison 10-speed automatic and built to outwork the competition.
Standard · All Trims
6.6L V8 Gas Engine
401
HP
464
lb-ft
18,500+
lb tow est.
- Standard engine across all 7 Sierra 2500 HD trims
- Allison 10-speed automatic transmission
- Strong low-end torque for loaded hauling
- Available in Regular, Double, and Crew Cab
- 2WD and 4WD configurations available
- Suitable for most contractor and fleet applications
Available • All Trims | Standard • Denali Ultimate
6.6L Duramax® Turbo-Diesel V8
470
HP
975
lb-ft
22,500
lb tow
- Most torque of any pickup truck — 975 lb-ft
- 25% more low-RPM torque than previous generation
- Up to 22,500 lbs towing (gooseneck/5th wheel)
- Allison 10-speed automatic transmission
- Best fuel efficiency of both engine options
- Standard on Denali Ultimate; available on all other trims
22,500
Max Towing (lbs)
Gooseneck / 5th wheel, diesel
4,049
Max Payload (lbs)
2500 HD configuration
975
Diesel Torque (lb-ft)
Most in any pickup
13
Camera Views
Incl. transparent trailer view
10
Allison Speeds
Standard on all trims
2026 Sierra 2500 HD Trim Levels
Seven distinct trims spanning from purpose-built work truck to hand-crafted luxury. Every one gets the Allison transmission.
Pro
Work-Ready Foundation
From $46,300
Regular / Double / Crew Cab | 2WD / 4WD
- 6.6L V8 Gas | 401 HP
- Allison 10-speed automatic
- Wireless Apple CarPlay / Android Auto
- Rear vision camera
- Forward Collision Alert
- Trailering package included
- Steel wheels — heavy-duty fleet ready
SLE
Upgraded Comfort
From $54,000
All Cab Styles | 2WD / 4WD
- 13.4" infotainment touchscreen
- 12.3" digital driver info center
- Traction Select with Tow/Haul mode
- Lane Keep Assist
- Blind-Spot Monitoring
- Rear Cross-Traffic Alert
- Available Duramax Diesel
SLT
Premium Features
From $65,200
Double / Crew Cab | 2WD / 4WD
- Leather-appointed seating
- Heated front seats
- Power adjustable pedals
- Dual-zone climate control
- ProGrade Trailering System
- Available MultiPro Tailgate
- Available Duramax Diesel
AT4
Off-Road HD
From $72,200
Crew Cab | 4WD Standard
- Off-road suspension & skid plates
- 20" gloss-black aluminum wheels
- Hill Descent Control
- Heated & ventilated leather seats
- AT4 off-road drive mode
- All-terrain tires
- AT4X upgrade: advanced off-road package
Denali
Luxury Meets Heavy-Duty
From $75,200
Crew Cab | 2WD / 4WD
- Perforated leather seating
- 20" machined aluminum wheels
- Heated & ventilated front seats
- 12-way power seats
- Heads-Up Display
- Available Duramax Diesel
- Up to 13 camera views
Denali Ultimate
The Pinnacle of HD Luxury
From $94,200
Crew Cab | Duramax Diesel Standard
- 6.6L Duramax Diesel standard
- Bose® premium 12-speaker audio
- Massaging front seats
- Illuminated power running boards
- 15" Head-Up Display
- Transparent trailer view camera
- Full luxury and technology suite
2026 Sierra 2500 HD Full Specifications
Key specs for the 2026 GMC Sierra 2500 HD. Figures vary by engine, cab, and drivetrain configuration.
| Specification | 2026 GMC Sierra 2500 HD |
|---|---|
| Gas Engine | 6.6L V8 Gasoline — 401 HP / 464 lb-ft |
| Diesel Engine | 6.6L Duramax Turbo-Diesel V8 — 470 HP / 975 lb-ft |
| Transmission | Allison 10-Speed Automatic (standard, all trims) |
| Drivetrain | 2WD or 4WD available on all trim levels |
| Max Towing (Gas) | Up to 18,500+ lbs (properly equipped) |
| Max Towing (Diesel) | Up to 22,500 lbs (gooseneck / 5th wheel) |
| Max Payload | Up to 4,049 lbs |
| Seating Capacity | 3 (Regular Cab) | Up to 6 (Double / Crew Cab) |
| Cab Configurations | Regular Cab | Double Cab | Crew Cab |
| Bed Options | Short Bed | Long Bed |
| Infotainment | 13.4" diagonal touchscreen (SLE and above) |
| Driver Info Center | 12.3" digital display (SLE and above) |
| Head-Up Display | Up to 15" diagonal (Denali Ultimate) |
| Camera Views | Up to 13, including transparent trailer view |
| Starting MSRP | $46,300 (Pro) |
| Trim Levels | Pro | SLE | SLT | AT4 | AT4X | Denali | Denali Ultimate |
Technology Built for Heavy-Duty Work
The Sierra 2500 HD packs premium technology into a truck built to haul, tow, and work harder than anything else on the road.
13.4" Infotainment Touchscreen
Large-format display on SLE and above with wireless Apple CarPlay, Android Auto, Google built-in, and over-the-air software updates.
Transparent Trailer View
Camera technology that effectively renders your trailer invisible — see traffic and obstacles behind your load just as if the trailer weren't there.
15" Head-Up Display
The largest HUD available on a pickup — projects speed, navigation, and trailering data directly onto the windshield for Denali Ultimate owners.
ProGrade Trailering System
Integrated hitch guidance, trailer sway control, trailer brake controller, and up to 13 camera views make towing safer and more precise than ever.
MultiPro Tailgate
Available on SLT and above — six tailgate configurations for easier loading, a built-in step, and an available Kicker audio system built into the gate.
Bose® 12-Speaker Premium Audio
Standard on Denali Ultimate — a 12-speaker Bose premium system tuned for the Sierra 2500 HD's interior acoustics, even with the Diesel engine running.
Safety Built for
Heavy Loads & Long Hauls
Towing 20,000+ lbs demands more than a great engine — it demands a truck that actively works to keep you and your cargo safe. The Sierra 2500 HD's safety systems extend to trailer coverage, giving you protection no matter what's hitched up behind you.
From Tampa Bay traffic to Florida's open highways, the Sierra HD's suite of driver assistance technology gives contractors and families alike the confidence to haul heavy — safely.
Schedule a Test Drive Automatic Emergency Braking Standard on all trims — radar and camera-based collision detection with pre-charged brakes
Blind-Spot Monitoring with Trailer Detection Extends monitoring to cover the full sides of your trailer — critical for wide and long loads
Transparent Trailer Camera View See through your trailer using a stitched camera feed — available via the ProGrade Trailering System
Lane Keep Assist & Departure Warning Available from SLE — alerts and assists to keep the Sierra centered during long-haul highway driving
Hill Descent Control Standard on AT4 and AT4X — maintains controlled speed on steep grades, with or without a heavy load
Rear Cross-Traffic Alert Warns of approaching cross-traffic when reversing — essential when backing a large trailer
Century's Exclusive Lifetime Powertrain Warranty
Every new 2026 GMC Sierra 2500 HD purchased at Century Buick GMC in Tampa comes with our Exclusive Lifetime Powertrain Warranty — covering your engine, transmission, and drive axles for as long as you own the truck. Whether you choose the gas V8 or Duramax Diesel, you're covered for life. No other GMC dealer in Tampa offers this.
Learn More About Our WarrantyWhy Buy Your Sierra HD at Century Buick GMC
Tampa Bay's most trusted heavy-duty truck dealer — here's what sets us apart from the competition.
Lifetime Powertrain Warranty
Gas or diesel — engine, transmission, and drive axles covered for as long as you own the truck.
Transparent Pricing
No dealer markup games. Market-based pricing is upfront on every Sierra 2500 HD in stock.
Home or Job Site Delivery
We'll bring your new Sierra HD directly to your home, office, or job site across Tampa Bay.
Trade-In Program
Get a competitive offer on your current truck — apply it directly toward your Sierra 2500 HD purchase.
Commercial Financing
Pre-approve online in minutes. We work with commercial lenders for business truck purchases too.
Current HD Specials
Check our monthly Sierra HD offers for manufacturer rebates, low-APR financing, and lease deals.
Frequently Asked Questions
What engine options are available on the 2026 GMC Sierra 2500 HD?
The 2026 GMC Sierra 2500 HD offers two engines: the standard 6.6L V8 gasoline engine producing 401 HP and 464 lb-ft of torque, and the available 6.6L Duramax Turbo-Diesel V8 producing 470 HP and a massive 975 lb-ft of torque. Both engines are paired with the Allison 10-speed automatic transmission as standard. The Duramax diesel is available on all trims and is standard on the Denali Ultimate.
How much can the 2026 GMC Sierra 2500 HD tow?
The 2026 GMC Sierra 2500 HD can tow up to 22,500 lbs when equipped with the Duramax 6.6L Turbo-Diesel, a gooseneck or fifth-wheel trailer setup, and the properly configured towing package. The gas-powered 6.6L V8 is rated for up to 18,500+ lbs of conventional towing when properly equipped. The Sierra 2500 HD also includes the ProGrade Trailering System with an integrated trailer brake controller and up to 13 camera views to make heavy towing safer.
Does the Sierra 2500 HD come with the Allison transmission?
Yes — the Allison 10-speed automatic transmission is standard on every 2026 GMC Sierra 2500 HD trim, regardless of which engine you choose. The Allison is widely regarded as the most durable and capable heavy-duty automatic transmission available in a pickup truck. It's a key reason the Sierra 2500 HD holds an advantage over competitors in real-world towing and hauling applications.
What is the payload capacity of the 2026 GMC Sierra 2500 HD?
The 2026 GMC Sierra 2500 HD has a maximum payload capacity of 4,049 lbs when properly configured. Payload capacity varies depending on cab style, bed length, engine, and drivetrain choices. The Regular Cab long-bed configuration with the gas engine and 2WD typically achieves the highest payload rating. If payload is your primary concern, our Century sales team can help you identify the exact configuration that maximizes it for your application.
What is the transparent trailer camera view on the Sierra 2500 HD?
The transparent trailer view is an advanced camera technology available on the Sierra 2500 HD that stitches together footage from multiple cameras — including the truck's front, rear, and sides — to effectively create a live view "through" your trailer. Instead of seeing the back of your trailer, you see what's behind it in real time. This feature is especially valuable when backing a large gooseneck, flatbed, or enclosed trailer into a tight space.
Does Century Buick GMC in Tampa stock the 2026 GMC Sierra 2500 HD?
Yes — Century Buick GMC maintains a strong inventory of 2026 GMC Sierra 2500 HD trucks across multiple trims, cab configurations, and engine choices including the Duramax Diesel. We serve truck buyers and contractors from Tampa, Brandon, Carrollwood, South Tampa, Westchase, St. Petersburg, and all of Tampa Bay. Every Sierra 2500 HD purchased at Century comes with our Exclusive Lifetime Powertrain Warranty — covering your engine, transmission, and drive axles for life.
Find Your 2026 GMC Sierra 2500 HD in Tampa
7 trims. Duramax Diesel. 22,500-lb towing. Visit Century Buick GMC — serving Tampa, Brandon, Carrollwood, South Tampa, Westchase, St. Petersburg, and all of Tampa Bay.
Although every effort is made to ensure all information shown is accurate, dealer is not liable for any inaccuracies, omissions, system errors and/or typographical errors. Pricing, specifications, and incentives may change at any time, without notice. Always check with us to confirm all information shown and get up-to-date pricing, incentive information, and availability. Price excludes tax, tag, registration, and title. Cash offers/rebates may not be available with special finance, lease and some other offers. Lease offers may not be available with special finance or some other offers; must qualify and lease through GM Financial. Used vehicles may be subject to unrepaired manufacturer recalls. Please check the National Highway Safety Administration website (https://vinrcl.safercar.gov/vin/) for current recall information and contact the dealer for assistance or questions before purchasing. Digital photo backgrounds may have been applied to some vehicle photos for visual consistency. MPG estimates on this website are EPA estimates; your actual mileage may vary. For used vehicles, MPG estimates are EPA estimates for the vehicle when it was new. The EPA periodically modifies its MPG calculation methodology; all MPG estimates are based on the methodology in effect when the vehicles were new (please see the Fuel Economy portion of the EPA's website for details, including MPG recalculation tool).
The Manufacturer's Suggested Retail Price excludes tax, title, license, dealer fees and optional equipment. Dealer sets final price.
More Info
Century Buick GMC | Tampa, Florida | CenturyBuickGMC.com
*MSRP figures shown are starting prices and exclude destination, taxes, title, registration, and dealer fees. Towing and payload capacities require proper equipment including trailer brakes where required by law and are based on maximum-rated configurations; actual capacity varies by cab, bed, engine, and drivetrain. Transparent trailer view requires compatible camera equipment. Lifetime Powertrain Warranty subject to terms and conditions — see dealer for full details. Inventory subject to prior sale. Prices and availability subject to change without notice.
Serving Tampa, Brandon, Carrollwood, South Tampa, Westchase, St. Petersburg, and all of Tampa Bay, Florida.