2025 GMC
Sierra 2500 HD Truck

Starting at: $46,300

  • Manufacturer Offer

    For Well-Qualified Buyers When Financed w/ GM Financial

    * Read full offer details
    Applies to this new 2025 GMC Sierra 2500 HD

    * 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 09/02/2025. 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. 4.9% APR for a term of 60 months corresponds to a monthly cost of $18.83 per $1000 financed. 5.9% APR for a term of 72 months corresponds to a monthly cost of $16.53 per $1000 financed. 5.9% APR for a term of 84 months corresponds to a monthly cost of $14.56 per $1000 financed. The rates described are for estimation purposes only; you may not be able to finance at this rate.

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  • Manufacturer Offer

    Bonus Cash

    * Read full offer details
    Applies to this new 2025 GMC Sierra 2500 HD

    * Disclaimer(s)

    • Not available with some other offers. Must take new retail delivery by 09/02/2025.

      See Trims

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Inventory

  • 2025 GMC Sierra 2500 HD Denali Ultimate

    • MSRP:$97,410
    • Offers:$1,000
    • Final Price:$96,410
    • Conditional Offers:$1,000
    Engine:
    6.6L V-8 Diesel,
    Transmission:
    Automatic,
    Drive Line:
    4WD,
    Exterior Color:
    White Frost Tricoat,
    Interior Color:
    Alpine Umber, Full Grain Leather seat trim,
    Stock #:
    G25375
    More
    View Details
  • 2025 GMC Sierra 2500 HD AT4

    • MSRP:$77,250
    • Discount:$3,862
    • Price:$73,388
    • Offers:$1,000
    • Final Price:$72,388
    • Conditional Offers:$1,000
    Engine:
    6.6L V-8,
    Transmission:
    Automatic,
    Drive Line:
    4WD,
    Exterior Color:
    Summit White,
    Interior Color:
    Jet Black with Kalahari accents, Perforated Front,
    Stock #:
    G25570
    More
    View Details
  • 2025 GMC Sierra 2500 HD AT4

    • MSRP:$88,280
    • Discount:$4,414
    • Price:$83,866
    • Offers:$1,000
    • Final Price:$82,866
    • Conditional Offers:$1,000
    Engine:
    6.6L V-8 Diesel,
    Transmission:
    Automatic,
    Drive Line:
    4WD,
    Exterior Color:
    Onyx Black,
    Interior Color:
    Jet Black with Kalahari accents, Perforated Front,
    Stock #:
    G25675
    More
    View Details
  • 2025 GMC Sierra 2500 HD Denali

    • MSRP:$78,420
    • Discount:$3,921
    • Price:$74,499
    • Offers:$2,000
    • Final Price:$72,499
    • Conditional Offers:$1,000
    Engine:
    6.6L V-8,
    Transmission:
    Automatic,
    Drive Line:
    4WD,
    Exterior Color:
    Summit White,
    Interior Color:
    Jet Black, Forge Perforated Leather seat trim,
    Stock #:
    G25685
    More
    View Details
  • 2025 GMC Sierra 2500 HD Denali Ultimate

    • MSRP:$97,025
    • Offers:$1,000
    • Final Price:$96,025
    • Conditional Offers:$1,000
    Engine:
    6.6L V-8 Diesel,
    Transmission:
    Automatic,
    Drive Line:
    4WD,
    Exterior Color:
    Sterling Metallic,
    Interior Color:
    Alpine Umber, Full Grain Leather seat trim,
    Stock #:
    G25695
    More
    View Details
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Specifications

Trims

  MSRP Engine Transmission City/Hwy mpg
Pro 2025 GMC Sierra 2500 HD Truck Pro Search New $46,300   401-hp 6.6L 8-cyl  10-spd auto  No Data  
Pro 2025 GMC Sierra 2500 HD Truck Pro Search New $48,200   401-hp 6.6L 8-cyl  10-spd auto  No Data  
Pro 2025 GMC Sierra 2500 HD Truck Pro Search New $48,400   401-hp 6.6L 8-cyl  10-spd auto  No Data  
Pro 2025 GMC Sierra 2500 HD Truck Pro Search New $49,100   401-hp 6.6L 8-cyl  10-spd auto  No Data  
Pro 2025 GMC Sierra 2500 HD Truck Pro Search New $50,000   401-hp 6.6L 8-cyl  10-spd auto  No Data  
Pro 2025 GMC Sierra 2500 HD Truck Pro Search New $50,200   401-hp 6.6L 8-cyl  10-spd auto  No Data  
SLE
Search New
$50,400   401-hp 6.6L 8-cyl  10-spd auto  No Data  
Pro 2025 GMC Sierra 2500 HD Truck Pro Search New $51,000   401-hp 6.6L 8-cyl  10-spd auto  No Data  
Pro 2025 GMC Sierra 2500 HD Truck Pro Search New $51,200   401-hp 6.6L 8-cyl  10-spd auto  No Data  
SLE
Search New
$52,500   401-hp 6.6L 8-cyl  10-spd auto  No Data  
SLE
Search New
$52,700   401-hp 6.6L 8-cyl  10-spd auto  No Data  
Pro 2025 GMC Sierra 2500 HD Truck Pro Search New $52,800   401-hp 6.6L 8-cyl  10-spd auto  No Data  
Pro 2025 GMC Sierra 2500 HD Truck Pro Search New $53,000   401-hp 6.6L 8-cyl  10-spd auto  No Data  
SLE
Search New
$53,200   401-hp 6.6L 8-cyl  10-spd auto  No Data  
SLE
Search New
$54,300   401-hp 6.6L 8-cyl  10-spd auto  No Data  
SLE
Search New
$54,500   401-hp 6.6L 8-cyl  10-spd auto  No Data  
SLE
Search New
$55,300   401-hp 6.6L 8-cyl  10-spd auto  No Data  
SLE
Search New
$55,500   401-hp 6.6L 8-cyl  10-spd auto  No Data  
SLE
Search New
$57,100   401-hp 6.6L 8-cyl  10-spd auto  No Data  
SLE
Search New
$57,300   401-hp 6.6L 8-cyl  10-spd auto  No Data  
SLT
Search New
$61,900   401-hp 6.6L 8-cyl  10-spd auto  No Data  
SLT
Search New
$62,200   401-hp 6.6L 8-cyl  10-spd auto  No Data  
SLT
Search New
$64,700   401-hp 6.6L 8-cyl  10-spd auto  No Data  
SLT
Search New
$65,000   401-hp 6.6L 8-cyl  10-spd auto  No Data  
AT4
Search New
$71,000   401-hp 6.6L 8-cyl  10-spd auto  No Data  
AT4
Search New
$71,200   401-hp 6.6L 8-cyl  10-spd auto  No Data  
Denali
Search New
$73,900   401-hp 6.6L 8-cyl  10-spd auto  No Data  
Denali
Search New
$74,100   401-hp 6.6L 8-cyl  10-spd auto  No Data  
AT4X
Search New
$83,200   401-hp 6.6L 8-cyl  10-spd auto  No Data  
Denali Ultimate
Search New
$93,300   470-hp 6.6L 8-cyl  10-spd auto  No Data  
Denali Ultimate
Search New
$93,600   470-hp 6.6L 8-cyl  10-spd auto  No Data  

Search Through Our New GMC and Buick Model Showroom Near St. Louis

If you're setting out in the St. Louis area for a quality new truck or SUV, our O'Fallon, MO GMC and Buick dealership is the place to shop. With our new model showroom both right here in O'Fallon and with this digital selection you can explore online, you'll see the latest trucks and SUVs from GMC and Buick, a couple of brands that are worth shopping from for incredible rides. See what we currently have available, explore our digital showroom, or visit us from St. Peters, Chesterfield, or St. Charles, MO today to see what we have in stock for new GMC and Buick inventory in O'Fallon.

With a growing focus on trucks and SUVs in the recent years, those are the styles you can expect to find in our new model showroom and throughout the rest of our new Buick and GMC model lineup. Choose any in the range of excellent SUVs we have for sale, from the Buick Envision, Enclave, and Encore, to the GMC Acadia, Terrain, and Yukon. Various sizes and cabin styles, as well as engine levels give you an idea of what each of these new SUVs provides for your family travels around St. Louis, MO and beyond, while the latest Buick and GMC tech will keep everyone safe, connected, and entertained while you're on the go around Chesterfield and St. Charles.

The latest new GMC trucks are excellent options for drivers from St. Peters or O'Fallon who require top-notch towing and hauling, and even high-end 4x4 capabilities. The full-sized GMC Sierra 1500 is a great flagship truck that shows you what to expect from pickups made by this brand. Offered in a variety of cab styles, engine levels, and special editions, you're bound to find the perfect match in a Sierra 1500, or if you need commercial-grade capabilities, check out the GMC Sierra 2500HD or 3500HD. For a smaller, midsized truck, the new GMC Canyon offers a range of versatility you'll love in the St. Louis area.

Explore the new model showroom on display here at O'Fallon Buick GMC and visit today to get going on a quick test drive.

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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