2025 GMC SIERRA HEAVY DUTY 2500 & 3500 PICKUP TRUCKS

 

Starting MSRP: $46,300*
AVAILABLE TOW UP TO 36,000 LBS.
AVAILABLE MULTIPRO™ TAILGATE
AVAILABLE 3500 MAX TOWING OF UP TO 36,000 LBS.*

 

Welcome to the ultimate in Professional Grade capability and capacity! The 2025 Sierra HD feels premium and luxurious inside, far exceeding what most would expect from a heavy-duty pickup.

The 2025 Sierra HD lineup includes 2500HD and 3500HD models, each in Regular Cab, Double Cab, and Crew Cab configurations. Dual-rear-wheel models are available in 3500HD, which brings the maximum towing capacity to 36,000 pounds. GMC offers several trim levels, including Pro, SLE, SLT, AT4, Denali, AT4X, and Denali Ultimate.

Performance

The standard engine for the 2025 Sierra HD is the 6.6-liter V-8 gasoline engine. It offers 401 horsepower and 464 pound-feet of torque. Available is the Duramax 6.6-liter V-8 turbodiesel with 470 horsepower and a peak torque of 975 pound-feet. Torque is up 25% in lower rpm for improved climbing and trailering ability.

The Allison 10-speed transmission is standard on all engines. With far more ratios in a similar overall range, the engine stays closer to its peak torque range, putting every single pound-foot of torque to good use. This increases the gas engine’s maximum towing capacity by 2,000 pounds for a total of 26,000 pounds. In addition, ratio changes are smoother, and downshifts are quicker.

Regarding capabilities, the 2025 Sierra 2500HD can tow up to 22,500 pounds, while the 3500HD has a maximum tow rating of 36,000 pounds using a gooseneck or fifth-wheel connection. Conventional towing is available up to 20,000 pounds for both the 2500HD and 3500HD. Payloads can go up to 3,759 pounds for the 2500HD and 7,290 pounds for the 3500HD.

Exterior

GMC gave the Sierra HD a styling overhaul last year that included a new front bumper, fascia, and grille. Each trim gets a unique look, and animated light signatures are available. The SLE, AT4, and Denali trims get new wheel designs, and dual-rear-wheel models get 18-inch polished aluminum wheels. The range-topping Denali Ultimate gets exclusive badges and 20-inch wheels, with plenty of exterior chrome accents.

Interior

Each trim gets a unique interior design, with refreshed styling and features across the Sierra lineup. GMC offers a variety of colors and materials, and the top trims get soft leather upholstery and accent stitching. The Sierra HD Denali Ultimate offers full-grain leather upholstery with an Ultimate badge on the seatbacks. The door panels feature full-grain leather, and the front seats offer 16-way adjustability with a massaging function. GMC also equips a microsuede headliner, a power sunroof, and etched stainless steel speaker grilles in the top trim.

Technology

GMC provides a 7.0-inch touchscreen with Apple CarPlay and Android Auto as standard, along with six speakers, a 3.5-inch gauge cluster display, USB ports, and a Wi-Fi hotspot. Most trims get a 12.3-inch digital gauge cluster and a bright 13.4-inch touchscreen. The system includes seven speakers, SiriusXM radio, remote start, dual-zone climate controls, and an available universal garage door opener. Top trims add a 12-speaker Bose audio system and a 15.0-inch head-up display. GMC’s infotainment software benefits greatly from the addition of Google built-in, which brings Maps, Google Assistant, and other features.

GMC offers the most available trailering assistance technologies in its class through GMC’s ProGrade trailering system, offering up to 14 camera views, including “transparent” trailer views, extended blind spot monitoring, trailer length indicators, and more.

Safety

Heavy-duty trucks don’t get the crash testing that light-duty trucks do, but GMC equips a solid list of standard driver aids. Forward collision warnings, automatic emergency braking, automatic high beams, lane departure alerts, pedestrian detection, a rearview camera, buckle-to-drive, and a teen driver mode come standard. Available tech includes adaptive cruise control, blind spot monitoring with rear cross-traffic alerts, parking sensors, a surround-view camera system, and more.

2025 GMC Sierra HD Exterior Colors

  • Downpour Metallic

  • Sterling Metallic

  • Volcanic Red Tintcoat

  • Thunderstorm Gray

  • Summit White

  • White Frost Tricoat

  • Titanium Rush Metallic

  • Onyx Black

2025 GMC SIERRA HEAVY DUTY 2500 & 3500 PICKUP TRUCK TRIMS

PRO

STARTING AT $46,300*

STANDARD FEATURES

  • 6.6L V8 gas engine with Allison® 10-speed automatic transmission
  • Trailering Package, Trailering Mirrors and Trailer Brake Controller
  • Best-in-class HD cargo box volume*
  • Wireless Apple CarPlay®* and wireless Android Auto™* compatibility

AVAILABLE FEATURES

  • Duramax 6.6L Turbo-Diesel V8 engine with Allison 10-speed automatic transmission
  • Adaptive Cruise Control* with trailering*

SLE

STARTING AT $50,400*

INCLUDES PRO STANDARD FEATURES, PLUS ADDS OR SUBSTITUTES

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

AVAILABLE FEATURES

  • Up to 13 camera views,* including transparent trailer view*
  • MultiPro™ Tailgate and MultiPro Tailgate Audio System by Kicker®*
  • X31 off-road package with twin-tube Rancho® shocks and skid plates

SLT

STARTING AT $60,100*

INCLUDES SLE STANDARD FEATURES, PLUS ADDS OR SUBSTITUTES

  • 10-way power driver and front outboard passenger heated seats with lumbar
  • Heated steering wheel
  • ProGrade Trailering System* with In-Vehicle Trailering App*
  • MultiPro Tailgate
  • 18″ machined aluminum wheels with dark grey metallic accents

AVAILABLE FEATURES

  • 10-way power-adjustable front heated and ventilated bucket seats with perforated leather appointments

AT4

STARTING AT $71,000*

INCLUDES SLT STANDARD FEATURES, PLUS ADDS OR SUBSTITUTES

  • Exclusive Jet Black interior with Kalahari accents, and heated and ventilated perforated front leather seating surfaces
  • Exclusive 20″ 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*

AVAILABLE FEATURES

  • 15″ diagonal Head-Up Display with off-road inclinometer

DENALI

STARTING AT $73,900*

INCLUDES SLT STANDARD FEATURES, PLUS ADDS OR SUBSTITUTES

  • 20″ Ultra-Bright machined wheels with bright chrome inserts*
  • Denali-exclusive authentic open-pore wood, patterned aluminum trim and forge perforated leather seating surfaces
  • 12-way heated and ventilated power front seats

AVAILABLE FEATURES

  • Duramax 6.6L Turbo-Diesel V8 engine with Allison 10-speed automatic transmission
  • Power sunroof
  • Rear Camera Mirror*

AT4X*

STARTING AT $83,200*

INCLUDES AT4 STANDARD FEATURES, PLUS ADDS OR SUBSTITUTES

  • Factory-installed 1.5″ suspension lift, Multimatic® DSSV dampers, rear electronic-locking differential, larger steel transfer case skid plate and front aluminum skid plate
  • 35″ Goodyear® Territory MT tires
  • 16-way heated and ventilated power front seats with massage feature
  • Obsidian Rush interior featuring full-grain leather seating with technical-grain leather accents and authentic Vanta ash wood

AVAILABLE FEATURES

  • AT4X AEV Edition featuring stamped steel bumpers, steering gear and transfer case skid plates, and 18″ Salta gloss-black wheels
  • Duramax 6.6L Turbo-Diesel V8 engine with Allison 10-speed automatic transmission

DENALI ULTIMATE

STARTING AT $92,800*

INCLUDES DENALI STANDARD FEATURES, PLUS ADDS OR SUBSTITUTES

  • Duramax 6.6L Turbo-Diesel V8 engine with Allison 10-speed automatic transmission
  • Signature Vader Chrome grille and exclusive 20″ Ultra-Bright machined aluminum wheels with gloss-black inserts*
  • Exclusive Alpine Umber interior featuring full-grain leather seating, authentic open-pore Paldao wood and 16-way power front seats with massage feature
  • 12-Speaker Bose* Premium Series with Centerpoint* surround sound
  • Illuminated power assist steps and MultiPro Tailgate Audio System by KICKER*

AVAILABLE FEATURES

  • Auxiliary trailer camera

We Are Here for You!

At Dieffenbach GM Superstore, you will have an automotive experience unlike any other. You can find new GM inventory, including the Blazer, Sierra, Acadia, Canyon, Suburban, and an unmatched collection of used car, truck, van, SUV and crossover inventory at our dealership near you.

Are you interested in leasing or financing your 2025 GMC SIERRA HEAVY DUTY 2500 & 3500 PICKUP TRUCKS? The Finance Department at Dieffenbach GM Superstore can help you find the right lease offer or finance solution that fits your budget. We cultivate relationships with many banks, lenders, and other financial organizations to provide you with great options in purchasing your new vehicle. In addition to the comprehensive factory warranty that comes with your new 2025 GMC SIERRA HEAVY DUTY 2500 & 3500 PICKUP TRUCKS, we offer extended warranty and protection programs to safeguard your investment.

Get the best deals and specials available to you on the 2025 GMC SIERRA HEAVY DUTY 2500 & 3500 PICKUP TRUCKS. Our knowledgeable sales staff wants to help you find the perfect fit in a new GM or used car. We can’t wait to welcome you to the Dieffenbach GM Superstore family and help you find your new car or used vehicle. Your support and customer service doesn’t stop after you sign your deal.

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