Pro
From $47,300
From $47,900 (Sierra 3500HD starting MSRP; pricing varies by configuration)
The work-first Sierra HD. 6.6L V8 gas engine, vinyl floors, steel wheels, 7" infotainment. Built for jobsites and fleet duty.
Heavy-Duty · Now at Marty's GMC
2026 GMC Sierra HD
In stock now in Kingston · From $47,300 · 4.6★ from 1,302 Google reviews
Up to 36,000 lbs gooseneck towing when properly equipped, 975 lb-ft of Duramax torque, Allison 10-speed.
The 2500HD and 3500HD deliver up to 36,000 lbs gooseneck towing when properly equipped (3500HD Regular Cab DRW Duramax), 975 lb-ft Duramax torque, and the Allison 10-speed automatic purpose-built for grade-hauling. Pro through Denali Ultimate, up to 14 available camera views, and the available MultiPro Tailgate. Built for work that matters.
36,000lbs
Max Gooseneck (3500HD DRW)
975lb-ft
Duramax Torque
470hp
Duramax Power
10-spd
Allison Auto
Quick Read
2026 GMC Sierra HD at a glance
| Starting MSRP | $47,300 (Pro); excludes the $2,795 destination freight charge. SLE from $54,300, SLT from $65,500, AT4 from $72,500, Denali from $75,200, AT4X from $85,500 (2500HD only), Denali Ultimate from $94,200. |
|---|---|
| Trims | Pro, SLE, SLT, AT4, AT4X (2500HD only), Denali, Denali Ultimate |
| Engines | 6.6L V8 gas (401 hp / 464 lb-ft) · 6.6L Duramax Turbo-Diesel V8 (470 hp / up to 975 lb-ft). The Duramax is standard on Denali Ultimate and available on every other trim. |
| Transmission & drivetrain | Allison 10-speed automatic · 2WD or 4WD · SRW or DRW (3500HD) |
| Seating | Up to 6 (Regular, Double, and Crew Cab) |
|---|---|
| Towing / payload | Up to 22,390 lbs gooseneck/fifth-wheel (2500HD Regular Cab; 21,870 lbs Crew Cab) and 20,000 lbs conventional (2500HD) · up to 36,000 lbs gooseneck (3500HD Regular Cab DRW) · up to 4,049 lbs payload (2500HD) and 7,290 lbs (3500HD). All maximums require the Duramax and proper equipment; ratings vary by cab, bed, and drivetrain. |
| Fuel economy | Not EPA-rated (heavy-duty class over 8,500 lbs GVWR) |
| Current offer | October 2026: 4.9% APR for 48 months + $2,000 Purchase Allowance + no monthly payments until next year (92-day deferral) on 2500HD/3500HD Denali; separate $3,500 Purchase Allowance on Pro, SLE, SLT and Denali diesel models; 2500HD Crew Cab 4WD Denali lease $799/mo for 36 months ($8,319 due at signing); advertised figures include the $595 dealer documentation fee. Take delivery by November 2, 2026. |
The 2026 GMC Sierra HD is a heavy-duty pickup sold in 2500HD and 3500HD configurations, with a 6.6L Duramax Turbo-Diesel V8 rated at 470 hp and up to 975 lb-ft and an Allison 10-speed automatic. Marty's GMC in Kingston, Massachusetts stocks both models in trims from Pro to Denali Ultimate.
02 / Capability
Where the HD advantage shows.
Four capability pillars that set the Sierra 2500HD and 3500HD apart.
6.6L Duramax Turbo-Diesel V8
The available 6.6L Duramax turbo-diesel V8 delivers 470 horsepower and up to 975 pound-feet of torque. Peak torque lands at 1,500 RPM for immediate pulling power on grades and trailering work. Paired with the Allison 10-speed automatic transmission, purpose-built for heavy-duty duty cycles and capable of towing the heaviest loads.
470hp
Peak Horsepower
975lb-ft
Peak Torque at 1,500 RPM
10-spd
Allison Automatic
Up to 36,000 lbs Towing When Properly Equipped
Sierra 2500HD gooseneck/fifth-wheel towing reaches up to 22,390 lbs on the Regular Cab and 21,870 lbs on the Crew Cab, with up to 20,000 lbs conventional, when properly equipped with the Duramax. The 3500HD tops out at 36,000 lbs gooseneck/fifth-wheel on the Regular Cab Dually (DRW) with the Duramax, properly equipped; the 3500HD Crew Cab is rated up to 31,440 lbs. Both models pair with the Allison 10-speed for smooth, controlled power delivery under load. Ratings vary by cab, bed, and drivetrain.
22,390lbs
2500HD Max Gooseneck (Regular Cab)
36,000lbs
3500HD Max Gooseneck (Regular Cab DRW)
4,049lbs
2500HD Max Payload (Regular Cab)
Up to 14 Camera Views
Available trailering technology includes up to 14 camera views with Transparent Trailer View technology that lets you see through your trailer. ProGrade Trailering App offers hitch guidance, backing assist, integrated trailer brake controller, and connectivity for managing trailer lights and brake settings. Hitch View displays your hitch point and trailer connection on the infotainment screen.
14views
Available Camera System
Transparent
Trailer View Tech
ProGrade
Trailering App
MultiPro Tailgate — Six Positions
The MultiPro Tailgate is standard on Denali and Denali Ultimate and available on other trims, and offers six functional positions: Primary Gate for full-bed loading, Primary Gate with Load Stop to prevent small cargo from rolling, Inner Gate Load Stop to support overhanging lumber or ladders, Full-Width Step with 375-lb grab handle for easy bed access, Easy-Access Setup for repeated loading, and Work Surface for jobsite tasks.
6pos
Functional Positions
375lbs
Grab Handle Capacity
Denali
Standard on Denali and Denali Ultimate
03 / Trims
Choose your Sierra HD.
Seven trims across 2500HD and 3500HD. Pro through Denali Ultimate, from $47,300 to $94,200.
View 2500HD Pro Inventory →
SLE
From $54,300
From $54,300 (Sierra HD SLE starting MSRP; 3500HD pricing varies by configuration)
Cloth seats, remote start, upgraded infotainment, and GMC Pro Safety Plus. The volume Sierra HD trim.
SLT
From $65,500
From $65,500 (Sierra HD SLT starting MSRP; 3500HD pricing varies by configuration)
10-way power heated front seats, heated steering wheel, ProGrade Trailering System with In-Vehicle Trailering App, and 18-inch machined aluminum wheels. Available perforated leather and MultiPro Tailgate. First step into luxury.
AT4
From $72,500
From $72,500 (Sierra HD AT4 starting MSRP; 3500HD pricing varies by configuration)
Off-Road Suspension Package with twin-tube Rancho shocks and skid plates, exclusive 20-inch gloss-black wheels with available BFGoodrich off-road tires, and up to 14 available camera views. Factory off-road capability.
AT4X
From $85,500
Factory-installed 1.5-inch suspension lift, 35-inch Goodyear Territory MT tires, rear electronic-locking differential, Multimatic DSSV dampers, 16-way massaging front seats, and the available 6.6L Duramax. Premium off-road halo.
Denali
From $75,200
From $75,200 (Sierra HD Denali starting MSRP; 3500HD pricing varies by configuration)
Available 6.6L Duramax, Denali-exclusive authentic wood trim, 12-way heated and ventilated power front seats, 20-inch Ultra-Bright wheels, MultiPro Tailgate, and available 15-inch Head-Up Display and power sunroof.
Denali Ultimate
From $94,200
From $94,200 (Sierra HD Denali Ultimate starting MSRP; 3500HD pricing varies by configuration)
Standard Duramax, full-grain leather with 16-way massaging front seats, 12-speaker Bose audio, power sunroof, illuminated power assist steps, MultiPro Tailgate Audio by Kicker, and 20-inch Ultra-Bright wheels (22-inch tires available).
04 / Powertrains
Two engines. One transmission.
6.6L gas and 6.6L Duramax turbo-diesel, both paired with the Allison 10-speed automatic.
6.6L V8 Gas
Horsepower
401 HP
Torque
464 lb-ft
Transmission
Allison 10-spd
Standard On
Pro · SLE · SLT · AT4 · AT4X · Denali
6.6L Duramax Turbo-Diesel V8
Horsepower
470 HP
Torque
975 lb-ft
Transmission
Allison 10-spd
Standard On
Denali Ultimate
Available On
All Trims
05 / Compare
Sierra HD vs. F-250 vs. RAM 2500. Heavy-duty truth.
Published OEM specs for the three heavy-duty trucks Marty's GMC customers compare.
Swipe to compare →
| Spec | GMCSierra 2500HDfrom $47,300* | FordF-250 Super Dutyfrom $45,975 | RAM2500from $45,995 |
|---|---|---|---|
| Max Tow (2500-class) | 22,390lbMax gooseneck/fifth-wheel, 2500HD Regular Cab Duramax, properly equipped (21,870 lb Crew Cab; 20,000 lb conventional) | 22,800lbF-250 6.7L PowerStroke + Max Trailer Tow | 20,000lbMax available diesel towing, 2500 Cummins HO |
| Diesel Torque | 975lb-ftDuramax 6.6L @ 1,500 RPM | 1,200lb-ft6.7L High-Output Power Stroke (500 hp) | 1,075lb-ft6.7L High-Output Cummins (430 hp) |
| Max Payload (2500-class) | 4,049lb2500HD Regular Cab, properly equipped (3,863 lb Crew Cab) | 3,860lbF-250 Crew Cab | 3,930lbRAM 2500 max gas payload (3,600 lb diesel) |
| Transmission | Allison 10-spdPurpose-built for HD duty | 10-spd AutoStandard automatic | 8-spd AutoTorqueFlite HD eight-speed automatic |
| Driver Assistance | Pro SafetyStandard on every trim; Adaptive Cruise Control with trailering available (standard on Denali and up) | BlueCruiseAvailable hands-free; limited lane coverage | ADAActive Driving Assist (hands-on); hands-free version is Ram 1500 only |
| MultiPro/Tailgate | MultiPro 6-posStep + load stop + work surface; standard on Denali and up, available on other trims | StandardSingle-piece power-down | MultiFunctionSplit barn doors |
Heavy-duty truck specs checked against ford.com, ramtrucks.com, and gmc.com 2026 model-year materials at time of publication; Ford F-250 tow and payload maximums are drawn from Ford published materials and vary by configuration. RAM 2500 lineup for 2026 includes standard-output and high-output Cummins turbodiesel variants. Towing and payload vary by configuration.
06 / Gallery
The range of Sierra HD capability.
From jobsite Pro to luxury Denali Ultimate. Off-road AT4 to gooseneck-towing power.
07 / Offers
October 2026 offers at Marty's GMC.
Offers updated October 5, 2026 · valid through November 2, 2026
National GMC heavy-duty programs running on the 2026 Sierra 2500HD and 3500HD. The $3,500 diesel allowance now covers Pro, SLE, SLT and Denali diesel models and is a separate offer from the 4.9% program. Take new retail delivery by November 2, 2026.
Headline · 2500HD & 3500HD Denali
4.9%APR / 48 Months
4.9% APR + $2,000 Purchase Allowance + no monthly payments until next year
On 2026 Sierra HD Denali (2500HD and 3500HD) for well-qualified buyers when financed through GM Financial. 4.9% APR for 48 months equals $22.98 per month per $1,000 financed. Plus a $2,000 Purchase Allowance, plus no monthly payments until next year (deferred 92 days; finance charges accrue from the date of financing; excludes PA residents). Some customers may not qualify. See disclosures ›
Cash · Pro, SLE, SLT & Denali Diesel
$3,500Purchase Allowance
$3,500 Purchase Allowance on select diesel models
$3,500 Purchase Allowance on 2026 Sierra HD Pro, SLE, SLT and Denali models equipped with the 6.6L Duramax turbo-diesel. Pro, SLE, SLT and Denali diesel models only. A separate offer from the 4.9% APR program; not available with lease and some other offers. See disclosures ›
Lease · 2500HD Denali only
$799/mo · 36 months
2026 Sierra 2500HD Crew Cab 4WD Denali
National GMC Lease Offer for well-qualified lessees through GM Financial. $8,319 due at signing (after all offers). $77,995 MSRP. $0 security deposit. 30,000-mile total mileage allowance; excess $0.25/mile. Tax, title, license, and registration extra. See disclosures ›
Value Your Trade
KBBInstant Cash Offer
Trading in your current truck?
Get a Kelley Blue Book® Instant Cash Offer on your current vehicle in minutes. Redeemable at Marty's GMC for 7 days — apply it toward your new Sierra HD or take the cash. Get your offer ›
Programs · Military & First Responder
GMMilitary & First Responder
GM Military Appreciation & First Responder programs
GM Military Appreciation and First Responder programs are available at Marty's GMC — take delivery by 1/4/2027; programs cannot be combined with each other. Ask us about eligibility. See disclosures ›
Take new retail delivery by November 2, 2026
Get Today's Sierra HD Price
Tell us which Sierra HD you want. We'll reply within one business hour.
No obligation. A Marty's GMC product specialist will confirm availability, current incentives, and your trade value.
Disclosures: All October 2026 GM Financial programs require new retail delivery by 11/2/2026 (finance and cash offers: 11/2/26; leases: 11-02-2026). 4.9% APR: 4.9% APR for well-qualified buyers when you finance a 2026 Sierra HD Denali (2500HD and 3500HD) through GM Financial. Length of contract 48 months. Monthly payment is $22.98 for every $1,000 you finance. Average example down payment is 10.7%. Must finance through GM Financial. Some customers may not qualify. Not available with lease and some other offers. $2,000 Purchase Allowance: on 2026 Sierra HD Denali (2500HD and 3500HD). Not available with some other offers. No monthly payments until next year: Deferred monthly payments for 92 days. Excludes residents of PA. Must finance with GM Financial. Some customers may not qualify. Down payment required at signing, if applicable. Finance charges accrue from date of financing. Not available with lease and some other offers. $3,500 Purchase Allowance: on 2026 Sierra HD Pro, SLE, SLT and Denali diesel models only. A separate offer from the 4.9% APR program. Not available with lease and some other offers. Sierra 2500HD Denali Lease: National GMC Lease Offer. Ultra Low-Mileage Lease for well-qualified lessees. $799/month for 36 months on a 2026 GMC Sierra 2500HD Crew Cab 4WD Denali with an MSRP of $77,995. $8,319 due at signing (after all offers); 36 monthly payments total $28,764. $0 security deposit. Mileage charge of $0.25/mile over 30,000 miles. For eligible new and unused models leased through GM Financial. Example based on survey. Each dealer sets own price. Your payments may vary. Option to purchase at lease end for an amount to be determined at lease signing. Lessor must approve lease. Lessee pays for maintenance, repair, excess wear and disposition fee of $495 or less at end of lease. No security deposit required. Payments may be higher in some states. Not available with other offers. GM Military Appreciation Offer: Eligible military personnel includes Active Duty members, Reservists, National Guard members, Veterans and Retirees of the U.S. Army, Navy, Air Force, Marine Corps and Coast Guard. Eligible participants are able to sponsor their spouse. At participating dealers only. Visit gmmilitaryappreciation.com for program eligibility details and for a list of eligible vehicles. Not available with some other offers. Must provide authorization number to participating dealer prior to or at time of vehicle delivery to receive offer. Take new retail delivery by 1/4/27. GM First Responder Offer: Must be a current Firefighter, Police, EMT/Paramedic or 911 Dispatcher. First Responders employed by federal, state or municipal governments may be subject to restrictions that limit their ability to accept this offer. Accordingly, this offer is void unless permitted by applicable federal, state and municipal laws, regulations, rules, ordinances, policies, codes of conduct, and other directives or standards regarding ethics and gift acceptance by the applicable federal, state or municipal employees. By accepting this offer, you verify that doing so complies with all laws, regulations, policies or other restrictions regarding ethics or gift acceptance that apply to you. Eligible participants are able to sponsor their spouse. At participating dealers only. Visit gmfirstresponderappreciation.com for program eligibility details and for a list of eligible vehicles. Not available with some other offers. Must provide authorization number to participating dealer prior to or at time of vehicle delivery to receive offer. Take new retail delivery by 1/4/27. The Military Appreciation and First Responder programs cannot be combined with each other. Trim starting MSRPs shown on this page exclude the $2,795 destination freight charge and optional equipment. All advertised prices, monthly lease payments, cash-due-at-signing amounts, and finance figures include the $595 dealer documentation fee. No additional documentation fee will be added at the time of sale. Tax, title, license, and registration extra. Not all offers stack. See Marty's GMC for complete details.
08 / Why Marty's GMC
The difference we bring.
Four reasons to buy your Sierra HD at Marty's GMC.
Expert Heavy-Duty Team
Our truck specialists understand 2500HD vs 3500HD configurations, gooseneck towing, payload optimization, and the Allison transmission. Real answers, not guesses.
Mon–Thu until 7 PM
Fri until 6 PM
Sat until 4 PM
Fri until 6 PM
Sat until 4 PM
Certified GMC Service
Every Sierra HD deserves ASE-certified technicians, full GMC diagnostic equipment, and Duramax-specific knowledge. Warranty-backed maintenance from day one. Schedule service ›
Available for all service
including warranty work
on 2026 models
including warranty work
on 2026 models
Real Inventory
We stock 2500HD and 3500HD in multiple trims, engines, and configurations. Test drive a 2500HD SRW today. Order the 3500HD DRW you spec'd. No wait.
2500HD & 3500HD
in stock daily
View online anytime
in stock daily
View online anytime
South Shore GMC Authority
Located at Kingston Collection Way, we work with jobsite owners, contractors, and families across Plymouth, Cape Cod, and the South Shore.
(781) 936-0081
5 Kingston Collection Way
Kingston, MA 02364
5 Kingston Collection Way
Kingston, MA 02364
What Our Customers Say
Highly rated by real South Shore buyers.
Marty's GMC serves Kingston, Plymouth, the South Shore, and Cape Cod. The reviews speak for themselves: 4.6 stars across 1,302 verified Google reviews. When you buy a Sierra HD at Marty's, you're buying it from a dealership New Englanders already trust.
Read Customer Reviews → Read every review on Google →
09 / Q&A
Sierra HD questions answered.
Real answers from the Marty's GMC team. Call if we missed yours.
How much can the 2026 GMC Sierra HD tow?
Sierra 2500HD: up to 22,390 lbs gooseneck/fifth-wheel towing (Regular Cab; 21,870 lbs Crew Cab) and up to 20,000 lbs conventional towing when properly equipped with the 6.6L Duramax. Sierra 3500HD: up to 36,000 lbs gooseneck or fifth-wheel towing on the Regular Cab Dually (DRW) with the Duramax, properly equipped; the 3500HD Crew Cab is rated up to 31,440 lbs. Both models pair with the Allison 10-speed automatic transmission, engineered for grade-hauling and heavy-duty work-truck duty cycles. Maximum payload reaches 4,049 lbs on the 2500HD and 7,290 lbs on the 3500HD, properly equipped.
2500HD vs 3500HD — which Sierra HD should I pick?
Choose 2500HD for gooseneck/fifth-wheel towing up to 22,390 lbs (20,000 lbs conventional), maximum payload of up to 4,049 lbs, and single rear wheels (SRW). Choose 3500HD for gooseneck/fifth-wheel towing up to 36,000 lbs when properly equipped (Regular Cab DRW Duramax), available dual rear wheels (DRW) for higher load capacity, and maximum payload of up to 7,290 lbs. Both come in Pro through Denali Ultimate trims with the same engine options. The 3500HD has no AT4X — the AT4X is exclusively a 2500HD trim.
What engines are available on the 2026 Sierra HD?
Two powertrains, both paired with the Allison 10-speed automatic transmission: (1) 6.6L V8 gas delivering 401 HP and 464 lb-ft of torque, the standard engine on every trim except Denali Ultimate; (2) 6.6L Duramax turbo-diesel V8 delivering 470 HP and 975 lb-ft with peak torque at 1,500 RPM, standard on Denali Ultimate and available on every other trim, including Denali. The Duramax is engineered for grade-hauling and immediate pulling power.
What is the max payload on the Sierra HD?
Sierra 2500HD: up to 4,049 lbs payload on the Regular Cab and up to 3,863 lbs on the Crew Cab, properly equipped. Sierra 3500HD: up to 7,290 lbs on the Regular Cab and up to 6,658 lbs on the Crew Cab; 3500HD payload depends heavily on single- vs dual-rear-wheel setup and body configuration. Payload varies by engine, driveline (2WD vs 4WD), bed length, and configuration. Call Marty's GMC at (781) 936-0081 to confirm the exact payload capacity for a specific trim and configuration.
Is Super Cruise available on the 2026 Sierra HD?
GMC does not list Super Cruise hands-free driving on the 2026 Sierra HD. Every 2026 Sierra HD includes GMC Pro Safety driver-assistance features as standard, and Adaptive Cruise Control with trailering is available (standard on Denali and Denali Ultimate). If hands-free highway driving is a must, the 2026 Sierra 1500 offers available Super Cruise.
What is the MultiPro Tailgate and which trims have it?
The MultiPro Tailgate is GMC's signature six-function tailgate with positions including Primary Gate, Primary Gate with Load Stop, Inner Gate Load Stop, Full-Width Step (375-lb grab handle), Easy-Access Setup, and Work Surface. Standard on Denali and Denali Ultimate and available on Pro, SLE, SLT, AT4, and AT4X. An available MultiPro Tailgate Audio System by Kicker turns the tailgate into a powered speaker.
What is the difference between SRW and DRW on the 3500HD?
SRW (Single Rear Wheel) is the standard configuration on Sierra 3500HD, with a single wheel on each side of the rear axle. DRW (Dual Rear Wheels) is available and adds a second rear wheel on each side, increasing load capacity, improving stability during heavy gooseneck or fifth-wheel towing, and maximizing payload. Required for the maximum 36,000 lbs gooseneck rating (3500HD Regular Cab DRW with the Duramax, properly equipped).
What is the warranty on the 6.6L Duramax diesel?
Every 2026 Sierra HD with the 6.6L Duramax includes a 5-year/100,000-mile diesel powertrain warranty, plus a 5-year/100,000-mile roadside assistance and courtesy transportation program. Gas-engine vehicles include a 5-year/60,000-mile powertrain warranty. All models include a 3-year/36,000-mile bumper-to-bumper limited warranty. Marty's GMC service uses ASE-certified technicians and full GMC diagnostic equipment.
What current GMC offers are running on Sierra HD at Marty's GMC?
For October 2026: 4.9% APR for 48 months on 2026 Sierra HD Denali (2500HD and 3500HD) financed through GM Financial, plus a $2,000 Purchase Allowance, plus no monthly payments until next year (payments deferred 92 days; finance charges accrue from the date of financing; excludes PA residents). Separately, a $3,500 Purchase Allowance on Sierra HD Pro, SLE, SLT and Denali models with the Duramax diesel (diesel models only; not available with lease; a separate offer from the 4.9% program). The 2500HD Crew Cab 4WD Denali also has a National GMC Lease Offer at $799/month for 36 months with $8,319 due at signing. GM Military Appreciation and First Responder programs are available through 1/4/2027. Advertised figures include the $595 dealer documentation fee; tax, title, license, and registration extra. All programs require new retail delivery by November 2, 2026. Call (781) 936-0081 for full eligibility.
Is the AT4X available on the 3500HD?
No. The AT4X is a 2500HD-exclusive trim. The 3500HD lineup consists of Pro, SLE, SLT, AT4, Denali, and Denali Ultimate. Both the 2500HD and 3500HD offer the AT4 with its Off-Road Suspension Package, twin-tube Rancho shocks, skid plates, and available off-road tires.
Where can I see Sierra HD inventory at Marty's GMC?
Browse 2026 Sierra 2500HD inventory and 2026 Sierra 3500HD inventory at martysgmc.com/searchnew.aspx, or call (781) 936-0081 to speak with a truck specialist or schedule a test drive. Open Mon–Thu until 7 PM, Fri until 6 PM, Sat until 4 PM.
10 / Local
Your 2026 GMC Sierra 2500HD and 3500HD dealer in Kingston, Massachusetts.
Marty's GMC has proudly served the South Shore and Cape Cod region from our home at 5 Kingston Collection Way in Kingston, Massachusetts. Just off Route 3 at the Kingston Collection mall, we are the most convenient GMC heavy-duty dealer for work-truck and family buyers across Plymouth, Pembroke, Duxbury, Hanover, Marshfield, Carver, Halifax, Middleborough, Wareham, Bourne, Sandwich, Falmouth, Hyannis, Barnstable, Mashpee, and the surrounding South Shore and Cape Cod communities.
The 2026 GMC Sierra 2500HD and 3500HD are built for New England jobsites, contractors, grade-hauling, and family towing. Seven trims from the $47,300 Pro to the $94,200 Denali Ultimate, the 6.6L Duramax turbo-diesel with 975 lb-ft peak torque, the Allison 10-speed automatic transmission engineered for heavy-duty work, up to 36,000 lbs gooseneck towing on the 3500HD when properly equipped, the available six-position MultiPro Tailgate, up to 14 available camera views in ProGrade Trailering, and access to a real GMC-certified service department with ASE technicians and full Duramax diagnostics.
Open Mon–Thu until 7 PM, Fri until 6 PM, Sat until 4 PM. Call (781) 936-0081 or visit martysgmc.com.
Explore the GMC lineup: 2026 Sierra 1500·2026 Canyon·2026 Acadia·2026 Yukon·2027 Terrain
11 / Visit
Test drive a Sierra HD. Today.
Drive a 2026 GMC Sierra 2500HD or 3500HD, ask the questions you came in with, and let our team build the deal that works for you. No pressure, no games.
Shop Sierra 2500HD →
Shop Sierra 3500HD →
Schedule Test Drive
Get Pre-Approved
Value Your Trade
Call (781) 936-0081
Get Today's Sierra HD Price
Tell us which Sierra HD you want. We'll reply within one business hour.
No obligation. A Marty's GMC product specialist will confirm availability, current incentives, and your trade value.
Visit
5 Kingston Collection Way
Kingston, MA 02364
Kingston, MA 02364
Call
(781) 936-0081
Hours
Mon–Thu 8:30–7
Fri 8:30–6 · Sat 8:30–4
Fri 8:30–6 · Sat 8:30–4
Marty's GMCJust off Route 3 · Kingston Collection
Disclosures
*MSRP excludes the $2,795 destination freight charge and optional equipment. All advertised prices, monthly lease payments, cash-due-at-signing amounts, and finance figures include the $595 dealer documentation fee. No additional documentation fee will be added at the time of sale. Tax, title, license, and registration extra. Dealer sets final price. October 2026 incentive offers require new retail delivery by 11/2/2026 for qualified buyers; not all offers stack with special finance, lease, and other programs. See Marty's GMC for complete details.
Maximum gooseneck/fifth-wheel towing of 22,390 lbs on Sierra 2500HD Regular Cab (21,870 lbs Crew Cab; conventional 20,000 lbs) and 36,000 lbs on Sierra 3500HD Regular Cab DRW (31,440 lbs Crew Cab) with the 6.6L Duramax Turbo-Diesel V8, properly equipped. Maximum payload of 4,049 lbs (2500HD Regular Cab) and 7,290 lbs (3500HD Regular Cab) varies by trim, cab, drivetrain, and configuration. Before you buy a vehicle or use it for trailering, carefully review the trailering section of the Owner's Manual. See gmc.com for complete specifications.
Safety or driver-assistance features are no substitute for the driver's responsibility to operate the vehicle in a safe manner. Read the vehicle Owner's Manual for important feature limitations and information. ProGrade Trailering, camera views, and the transparent trailer view are available on selected trims and configurations.
Allison 10-speed automatic transmission is standard on all Sierra HD powertrains. Duramax diesel torque rating of up to 975 lb-ft when properly equipped.
Vehicle imagery: hero photo and gallery images are sourced from gmc.com's official Adobe Experience Manager content delivery network and reflect 2026 model-year configurations and trim-specific details.
(c) 2026 Marty's GMC, 5 Kingston Collection Way, Kingston, MA 02364. All rights reserved. GMC, Sierra, Denali, AT4, AT4X, MultiPro, ProGrade Trailering, and Duramax are trademarks of General Motors.