Prices starting at: $47,900

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Learn More About Buying a 2026 GMC Sierra 3500 HD in KEENE

Visit Fairfield's Buick GMC for a great deal on a new 2026 GMC Sierra 3500 HD. Our sales team is ready to show you all of the features that you will find in the GMC Sierra 3500 HD and take you for a test drive in the KEENE Area. At our GMC dealership you will find competitive prices, a stocked inventory of 2026 GMC Sierra 3500 HD cars and a helpful sales team. Stop by our car dealership today and take a 2026 GMC for a spin.

2025 GMC Sierra 3500 HD Truck

2025 GMC Sierra 3500 HD Denali Ultimate

  • MSRP$100,315
  • Offers$6,000
  • Fairfield Price$94,315
Engine: 6.6L Duramax Turbo-Diesel V8 engine, Transmission: Automatic, Exterior Color: Onyx Black, Interior Color: Alpine Umber, Full Grain Leather seating surfaces
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2025 GMC Sierra 3500 HD Truck

2025 GMC Sierra 3500 HD Denali Ultimate

  • MSRP$100,515
  • Offers$6,000
  • Fairfield Price$94,515
Engine: 6.6L Duramax Turbo-Diesel V8 engine, Transmission: Automatic, Exterior Color: Onyx Black, Interior Color: Alpine Umber, Full Grain Leather seating surfaces
View Details
2025 GMC Sierra 3500 HD Truck

2025 GMC Sierra 3500 HD Denali Ultimate

  • MSRP$100,020
  • Offers$6,000
  • Fairfield Price$94,020
Engine: 6.6L Duramax Turbo-Diesel V8 engine, Transmission: Automatic, Exterior Color: Summit White, Interior Color: Alpine Umber, Full Grain Leather seating surfaces
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2025 GMC Sierra 3500 HD Truck

2025 GMC Sierra 3500 HD Denali Ultimate

  • MSRP$100,665
  • Offers$6,000
  • Fairfield Price$94,665
Engine: 6.6L Duramax Turbo-Diesel V8 engine, Transmission: Automatic, Exterior Color: Onyx Black, Interior Color: Alpine Umber, Full Grain Leather seating surfaces
View Details
2025 GMC Sierra 3500 HD Truck

2025 GMC Sierra 3500 HD Denali Ultimate

  • MSRP$101,930
  • Offers$6,000
  • Fairfield Price$95,930
Engine: 6.6L Duramax Turbo-Diesel V8 engine, Transmission: Automatic, Exterior Color: White Frost Tricoat, Interior Color: Alpine Umber, Full Grain Leather seating surfaces
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2026 GMC Sierra 3500 HD Truck

2026 GMC Sierra 3500 HD SLE

  • MSRP$64,460
Engine: 6.6L V8 Gas engine, Transmission: Automatic, Exterior Color: Sterling Metallic, Interior Color: Jet Black, Cloth seat trim
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View All New GMC Sierra 3500 HD
2019 GMC Sierra 3500 HD Truck

2019 GMC Sierra 3500 HD Denali

  • Price$52,895
Engine: 6.6L Engine: V8 DuraMax Diesel, Turbo, Transmission: Automatic, Mileage: 79,887 miles, Exterior Color: Red Quartz Tintcoat, Interior Color: JET BLACK, PERFORATED LEATHER-APPOINTED FRONT SEAT
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2024 GMC Sierra 3500 HD Truck

2024 GMC Sierra 3500 HD Denali

  • Price$67,767
Engine: 6.6L Duramax Turbo-Diesel V8 engine, Transmission: Automatic, Mileage: 47,955 miles, Exterior Color: White Frost Tricoat, Interior Color: Jet Black, Forge Perforated Leather seating surfac
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2024 GMC Sierra 3500 HD Truck

2024 GMC Sierra 3500 HD Denali

  • Price$69,875
Engine: 6.6L Duramax Turbo-Diesel V8 engine, Transmission: Automatic, Mileage: 53,739 miles, Exterior Color: White Frost Tricoat, Interior Color: Jet Black, Forge Perforated Leather seating surfac
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2024 GMC Sierra 3500 HD Truck

2024 GMC Sierra 3500 HD Denali

  • Price$72,895
Engine: 6.6L Duramax Turbo-Diesel V8 engine, Transmission: Automatic, Mileage: 37,000 miles, Exterior Color: Summit White, Interior Color: Jet Black, Forge Perforated Leather seating surfac
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2024 GMC Sierra 3500 HD Truck

2024 GMC Sierra 3500 HD AT4

  • Price$74,805
Engine: 6.6L Duramax Turbo-Diesel V8 engine, Transmission: Automatic, Mileage: 24,168 miles, Exterior Color: Titanium Rush Metallic, Interior Color: Jet Black with Kalahari accents, Perforated Front
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2023 GMC Sierra 3500 HD Truck

2023 GMC Sierra 3500 HD Pro

  • Price$37,800
Engine: 6.6L V8 Gas engine, Transmission: Automatic, Mileage: 84,810 miles, Exterior Color: Summit White, Interior Color: Jet Black, Cloth seat trim
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2024 GMC Sierra 3500 HD Truck

2024 GMC Sierra 3500 HD Denali Ultimate

  • Price$77,995
Engine: 6.6L Duramax Turbo-Diesel V8 engine, Transmission: Automatic, Mileage: 37,997 miles, Exterior Color: Onyx Black, Interior Color: Alpine Umber, Full Grain Leather seating surfaces
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2019 GMC Sierra 3500 HD Truck

2019 GMC Sierra 3500 HD Denali

  • PricePlease Call
Engine: 6.6L Engine: V8 DuraMax Diesel, Turbo, Transmission: Automatic, Mileage: 112,476 miles, Exterior Color: Dark Slate Metallic, Interior Color: JET BLACK, PERFORATED LEATHER-APPOINTED FRONT SEAT
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2023 GMC Sierra 3500 HD Truck

2023 GMC Sierra 3500 HD Denali

  • PricePlease Call
Engine: 6.6L Duramax Turbo-Diesel V8 engine, Transmission: Automatic, Mileage: 69,850 miles, Exterior Color: Onyx Black, Interior Color: JET BLACK, FORGE PERFORATED LEATHER SEATING SURFAC
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View All Pre-Owned GMC Sierra 3500 HD

GMC (1)

Sierra 3500 HD Truck (5)

2026

Manufacturer Offer

For Well-Qualified Buyers When Financed w/ GM Financial

  1. 4.9% APR for 36 months
  2. 4.9% APR for 48 months
  3. 5.9% APR for 60 months
  4. 6.9% APR for 72 months
  • Applies to this new 2026 GMC Sierra 3500 HD

For Well-Qualified Buyers When Financed w/ GM Financial

Disclaimer(s)
  • 4.9% APR for 48 months for well-qualified buyers when financed w/GM Financial. Monthly payment is $22.98 for every $1000 you finance. Average example down payment is 10.0%. Not available with leases and some other offers. Must take new retail delivery by 01/02/2026. Truth in Lending Act Disclosure: Down payment will vary with APR and credit. For example, 4.9% APR with $2,500 down payment provides for 48 monthly payments of $22.98 per $1000 financed for qualified buyers. 4.9% APR for a term of 36 months corresponds to a monthly cost of $29.93 per $1000 financed. 6.9% APR for a term of 84 months corresponds to a monthly cost of $15.04 per $1000 financed. 6.9% APR for a term of 72 months corresponds to a monthly cost of $17 per $1000 financed. 5.9% APR for a term of 60 months corresponds to a monthly cost of $19.29 per $1000 financed. The rates described are for estimation purposes only; you may not be able to finance at this rate. (See Trims)
  • See State Disclaimer *
Manufacturer Offer

Purchase Allowance

  1. $500 Cash
  • Applies to this new 2026 GMC Sierra 3500 HD

Disclaimer(s)
  • Not available with special financing, lease and some other offers. Must take new retail delivery by 01/02/2026. (See Trims)
  • See State Disclaimer *

2025

Manufacturer Offer

For Well-Qualified Buyers When Financed w/ GM Financial

  1. 3.9% APR for 36 months
  2. 3.9% APR for 48 months
  3. 4.9% APR for 60 months
  4. 5.9% APR for 72 months
  • Applies to this new 2025 GMC Sierra 3500 HD

For Well-Qualified Buyers When Financed w/ GM Financial

Disclaimer(s)
  • 3.9% APR for 48 months for well-qualified buyers when financed w/GM Financial. Monthly payment is $22.53 for every $1000 you finance. Average example down payment is 11.7%. Not available with leases and some other offers. Must take new retail delivery by 01/02/2026. Truth in Lending Act Disclosure: Down payment will vary with APR and credit. For example, 3.9% APR with $2,500 down payment provides for 48 monthly payments of $22.53 per $1000 financed for qualified buyers. 3.9% APR for a term of 36 months corresponds to a monthly cost of $29.48 per $1000 financed. 5.9% APR for a term of 84 months corresponds to a monthly cost of $14.56 per $1000 financed. 5.9% APR for a term of 72 months corresponds to a monthly cost of $16.53 per $1000 financed. 4.9% APR for a term of 60 months corresponds to a monthly cost of $18.83 per $1000 financed. The rates described are for estimation purposes only; you may not be able to finance at this rate. (See Trims)
  • See State Disclaimer *
Manufacturer Offer

Fairfield's Difference

  1. $5,000 Cash
  • Applies to this new 2025 GMC Sierra 3500 HD

Disclaimer(s)
  • Everyone Qualifies for This Discount (See Trims)
  • See State Disclaimer *
Manufacturer Offer

Purchase Allowance

  1. $1,000 Cash
  • Applies to this new 2025 GMC Sierra 3500 HD

Disclaimer(s)
  • Not available with special financing, lease and some other offers. Must take new retail delivery by 01/02/2026. (See Trims)
  • See State Disclaimer *

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Disclaimer: The Manufacturer’s Suggested Retail Price excludes tax, title, license, dealer fees and optional equipment. Dealer sets final price.

1Dealer Discount applied to everyone