Prices starting at: $38,300

View photos, watch videos and get a quote on a new 2026 GMC Sierra 1500 in O'Fallon, MO.

Request More Info

* Indicates a required field

Learn More About Buying a 2026 GMC Sierra 1500 in O'Fallon

Visit O'Fallon Buick GMC for a great deal on a new 2026 GMC Sierra 1500. Our sales team is ready to show you all of the features that you will find in the GMC Sierra 1500 and take you for a test drive in the O'Fallon Area. At our GMC dealership you will find competitive prices, a stocked inventory of 2026 GMC Sierra 1500 cars and a helpful sales team. Stop by our car dealership today and take a 2026 GMC for a spin.

2026 GMC Sierra 1500 Truck

2026 GMC Sierra 1500 Pro

  • MSRP$51,755
  • Discount$3,623
  • Price$48,132
  • Doc Fee$599
  • Final Price$44,481
  • Offers$4,250
  • Final Price$44,481
  • Conditional Offers$4,000
Engine: 5.3L EcoTec3 V8 engine, Transmission: Automatic, Exterior Color: Onyx Black, Interior Color: Jet Black, Cloth seat trim
View Details
2026 GMC Sierra 1500 Truck

2026 GMC Sierra 1500 SLT

  • MSRP$71,300
  • Discount$6,773
  • Price$64,527
  • Doc Fee$599
  • Final Price$61,876
  • Offers$3,250
  • Final Price$61,876
  • Conditional Offers$4,500
Engine: 6.2L EcoTec3 V8 engine, Transmission: Automatic, Exterior Color: Volcanic Red Tintcoat, Interior Color: Jet Black, Perforated leather-appointed front outb
View Details
2026 GMC Sierra 1500 Truck

2026 GMC Sierra 1500 Pro

  • MSRP$48,240
  • Discount$3,377
  • Featured Price $44,863
  • Add-On$4,900
  • Price$49,763
  • Doc Fee$599
  • Final Price$46,862
  • Offers$3,500
  • Final Price$46,862
  • Conditional Offers$4,500
Engine: TurboMax™ engine, Transmission: Automatic, Exterior Color: Onyx Black, Interior Color: Jet Black, Cloth seat trim
View Details
2026 GMC Sierra 1500 Truck

2026 GMC Sierra 1500 SLT

  • MSRP$69,035
  • Discount$6,558
  • Price$62,477
  • Doc Fee$599
  • Final Price$60,826
  • Offers$2,250
  • Final Price$60,826
  • Conditional Offers$3,500
Engine: 3.0L Duramax® Turbo Diesel engine, Transmission: Automatic, Exterior Color: Summit White, Interior Color: Jet Black, Perforated leather-appointed front outb
View Details
2026 GMC Sierra 1500 Truck

2026 GMC Sierra 1500 Elevation

  • MSRP$68,200
  • Discount$6,500
  • Price$61,700
  • Doc Fee$599
  • Final Price$58,049
  • Offers$4,250
  • Final Price$58,049
  • Conditional Offers$4,000
Engine: 5.3L EcoTec3 V8 engine, Transmission: Automatic, Exterior Color: Summit White, Interior Color: Jet Black, Leather-appointed front seat trim
View Details
2026 GMC Sierra 1500 Truck

2026 GMC Sierra 1500 Elevation

  • MSRP$61,260
  • Discount$6,500
  • Price$54,760
  • Doc Fee$599
  • Final Price$51,109
  • Offers$4,250
  • Final Price$51,109
  • Conditional Offers$4,000
Engine: 5.3L EcoTec3 V8 engine, Transmission: Automatic, Exterior Color: Onyx Black, Interior Color: Jet Black, Cloth seat trim
View Details
2026 GMC Sierra 1500 Truck

2026 GMC Sierra 1500 SLT

  • MSRP$70,555
  • Discount$6,703
  • Price$63,852
  • Doc Fee$599
  • Final Price$61,201
  • Offers$3,250
  • Final Price$61,201
  • Conditional Offers$4,500
Engine: 6.2L EcoTec3 V8 engine, Transmission: Automatic, Exterior Color: Sterling Metallic, Interior Color: Jet Black, Perforated leather-appointed front outb
View Details
2026 GMC Sierra 1500 Truck

2026 GMC Sierra 1500 SLT

  • MSRP$69,469
  • Discount$6,600
  • Price$62,869
  • Doc Fee$599
  • Final Price$59,218
  • Offers$4,250
  • Final Price$59,218
  • Conditional Offers$4,000
Engine: 5.3L EcoTec3 V8 engine, Transmission: Automatic, Exterior Color: Glacier White Tricoat, Interior Color: Jet Black, Perforated leather-appointed front outb
View Details
2026 GMC Sierra 1500 Truck

2026 GMC Sierra 1500 Pro

  • MSRP$50,915
  • Discount$3,564
  • Price$47,351
  • Doc Fee$599
  • Final Price$43,700
  • Offers$4,250
  • Final Price$43,700
  • Conditional Offers$4,000
Engine: 5.3L EcoTec3 V8 engine, Transmission: Automatic, Exterior Color: Onyx Black, Interior Color: Jet Black, Cloth seat trim
View Details
2026 GMC Sierra 1500 Truck

2026 GMC Sierra 1500 Pro

  • MSRP$51,315
  • Discount$3,592
  • Price$47,723
  • Doc Fee$599
  • Final Price$44,072
  • Offers$4,250
  • Final Price$44,072
  • Conditional Offers$4,000
Engine: 5.3L EcoTec3 V8 engine, Transmission: Automatic, Exterior Color: Coastal Dune, Interior Color: Jet Black, Cloth seat trim
View Details
View All New GMC Sierra 1500
2025 GMC Sierra 1500 Truck Crew Cab

2025 GMC Sierra 1500 Denali

  • Price$58,900
  • Doc Fee$599
  • Final Price$59,499
Engine: 6.2L EcoTec3 V8 engine, Transmission: Automatic, Mileage: 17,252 miles, Exterior Color: Sterling Metallic, Interior Color: Atmosphere/Brownstone, Forge perforated leather se
View Details
2021 GMC Sierra 1500 Truck Crew Cab

2021 GMC Sierra 1500 Denali

  • Price$44,700
  • Doc Fee$599
  • Final Price$45,299
Engine: 6.2L Engine: , EcoTec3 V-8, DI, Dynamic Fuel Mgt, V V T, Transmission: Automatic, Mileage: 47,886 miles, Exterior Color: White Frost Tricoat, Interior Color: DARK WALNUT/DARK ASH GREY, FORGE PERFORATED LEATHE
View Details
2016 GMC Sierra 1500 Truck Crew Cab

2016 GMC Sierra 1500 SLE

  • Price$21,500
  • Doc Fee$599
  • Final Price$22,099
Engine: 5.3L Engine: , V-8, SIDI, Active Fuel Mgt, Transmission: Automatic, Mileage: 133,169 miles, Exterior Color: Onyx Black, Interior Color: JET BLACK, CLOTH SEAT TRIM
View Details
2024 GMC Sierra 1500 Truck Crew Cab

2024 GMC Sierra 1500 AT4

  • Price$52,900
  • Doc Fee$599
  • Final Price$53,499
Engine: 3.0L Duramax® Turbo Diesel engine, Transmission: Automatic, Mileage: 51,204 miles, Exterior Color: Dynamic Blue Metallic, Interior Color: Jet Black with Kalahari accents, Perforated leathe
View Details
2023 GMC Sierra 1500 Truck Crew Cab

2023 GMC Sierra 1500 AT4

  • Price$50,900
  • Doc Fee$599
  • Final Price$51,499
Engine: 6.2L EcoTec3 V8 engine, Transmission: Automatic, Mileage: 41,052 miles, Exterior Color: Titanium Rush Metallic, Interior Color: Jet Black with Kalahari accents, Perforated leathe
View Details
2019 GMC Sierra 1500 Truck Crew Cab

2019 GMC Sierra 1500 SLT

  • Price$29,900
  • Doc Fee$599
  • Final Price$30,499
Engine: 5.3L Engine: , EcoTec3 V-8, DI, Dynamic Fuel Mgt, V V T, Transmission: Automatic, Mileage: 124,915 miles, Exterior Color: Pacific Blue Metallic, Interior Color: JET BLACK, PERFORATED LEATHER-APPOINTED SEAT TRIM
View Details
2024 GMC Sierra 1500 Truck Crew Cab

2024 GMC Sierra 1500 Denali Ultimate

  • Final PricePlease Call
Engine: 6.2L EcoTec3 V8 engine, Transmission: Automatic, Mileage: 9,743 miles, Exterior Color: White Frost Tricoat, Interior Color: Alpine Umber, Forge perforated leather seat trim
View Details
2024 GMC Sierra 1500 Truck Crew Cab

2024 GMC Sierra 1500 AT4

  • Price$53,900
  • Doc Fee$599
  • Final Price$54,499
Engine: 3.0L Duramax® Turbo Diesel engine, Transmission: Automatic, Mileage: 39,051 miles, Exterior Color: Volcanic Red Tintcoat, Interior Color: Jet Black with Kalahari accents, Perforated leathe
View Details
2022 GMC Sierra 1500 Truck Crew Cab

2022 GMC Sierra 1500 Elevation

  • Price$34,900
  • Doc Fee$599
  • Final Price$35,499
Engine: 2.7L Turbo High-Output engine, Transmission: Automatic, Mileage: 78,176 miles, Exterior Color: Summit White, Interior Color: Jet Black, Cloth seat trim
View Details
View All Pre-Owned GMC Sierra 1500

GMC (1)

Sierra 1500 Truck (13)

2026

Manufacturer Offer

No Monthly Payments for 130 Days for Well-Qualified Buyers When Financed w/ GM Financial

  1. 0.0% APR for 36 months
  2. 0.0% APR for 48 months
  3. 0.0% APR for 60 months
  4. 2.9% APR for 72 months
  • Applies to this new 2026 GMC Sierra 1500

No Monthly Payments for 130 Days for Well-Qualified Buyers When Financed w/ GM Financial

Disclaimer(s)
  • Deferred monthly payments for 130 days. Finance charges accrue from date of financing. Must finance with GM Financial. Down payment required at signing, if applicable. Offer not available in PA. Some customers may not qualify. Not available with lease and some other offers. 0.0% APR for 60 months for well-qualified buyers when financed w/GM Financial. Monthly payment is $16.67 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 06/30/2026. Truth in Lending Act Disclosure: Down payment will vary with APR and credit. For example, 0.0% APR with $2,500 down payment provides for 60 monthly payments of $16.67 per $1000 financed for qualified buyers. 0.0% APR for a term of 48 months corresponds to a monthly cost of $20.83 per $1000 financed. 0.0% APR for a term of 36 months corresponds to a monthly cost of $27.78 per $1000 financed. 2.9% APR for a term of 72 months corresponds to a monthly cost of $15.15 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

No Monthly Payments for 130 Days for Well-Qualified Buyers When Financed w/ GM Financial

  • Applies to this new 2026 GMC Sierra 1500

No Monthly Payments for 130 Days for Well-Qualified Buyers When Financed w/ GM Financial

Disclaimer(s)
  • Deferred monthly payments for 130 days. Finance charges accrue from date of financing. Must finance with GM Financial. Down payment required at signing, if applicable. Offer not available in PA. Some customers may not qualify. Not available with lease and some other offers. 6.9% APR for 84 months for well-qualified buyers when financed w/GM Financial. Monthly payment is $15.04 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 06/30/2026. Truth in Lending Act Disclosure: Down payment will vary with APR and credit. For example, 6.9% APR with $2,500 down payment provides for 84 monthly payments of $15.04 per $1000 financed for qualified buyers. 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

Bonus Cash

  1. $2,500 Cash
  • Applies to this new 2026 GMC Sierra 1500

Disclaimer(s)
  • Not available with some other offers. Must take new retail delivery by 06/30/2026. (See Trims)
  • See State Disclaimer *
Manufacturer Offer

Purchase Allowance

  1. $1,750 Cash
  • Applies to this new 2026 GMC Sierra 1500

Disclaimer(s)
  • Not available with special financing, lease and some other offers. Must take new retail delivery by 06/30/2026. (See Trims)
  • See State Disclaimer *
Manufacturer Offer

Bonus Cash

  1. $1,750 Cash
  • Applies to this new 2026 GMC Sierra 1500

Disclaimer(s)
  • Not available with some other offers. Must take new retail delivery by 06/30/2026. (See Trims)
  • See State Disclaimer *
Manufacturer Offer

Bonus Cash

  1. $1,500 Cash
  • Applies to this new 2026 GMC Sierra 1500

Disclaimer(s)
  • Not available with some other offers. Must take new retail delivery by 06/30/2026. (See Trims)
  • See State Disclaimer *
Manufacturer Offer

Bonus Cash

  1. $500 Cash
  • Applies to this new 2026 GMC Sierra 1500

Disclaimer(s)
  • Not available with some other offers. Must take new retail delivery by 06/30/2026. (See Trims)
  • See State Disclaimer *
Manufacturer Offer

SCR GMC Lease - Unrestricted

  • Applies to this new 2026 GMC Sierra 1500.

Ultra Low-Mileage Lease for Well-Qualified Lessees. $349/month for 24 months. For Current Ultra-Low Mileage Lease for Well-Qualified Lessees Lessees of 2021 model year or newer select GM vehicles : $5,009 due at signing (after all offers).** $0 security deposit. Tax, title, license, and dealer fees extra. Mileage charge of $0.25/mile over 20,000 miles at participating dealers.

Disclaimer(s)
  • **For Current Ultra-Low Mileage Lease for Well-Qualified Lessees Lessees of 2021 model year or newer Buick and GMC vehicles at least 30 days prior to the lease of a new GM vehicle through GM Financial : Each dealer sets own price. $349/month for 24 months. Your payments may vary. Payments are for a 2026 GMC Sierra 1500 Short Box Crew Cab 4WD Elevation w/5.3L EcoTec3 V8 with an MSRP of $60,990. Based on due at signing amount of $5,009 (after all offers). 24 monthly payments total $8,376. Must show proof of lease. Option to purchase at lease end for an amount to be determined at lease signing. Lessor must approve lease. Take new retail delivery by 06-30-2026. 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. (See Trims)
  • See State Disclaimer *
Manufacturer Offer

Trade Assistance

  1. $3,500 Cash
  • Applies to this new 2026 GMC Sierra 1500

Disclaimer(s)
  • Must trade in a 2012 model year or newer vehicle. Not available with lease and some other offers. Must take new retail delivery by 06/30/2026. (See Trims)
  • See State Disclaimer *
Manufacturer Offer

Trade Assistance

  1. $3,000 Cash
  • Applies to this new 2026 GMC Sierra 1500

Disclaimer(s)
  • Must trade in a 2012 model year or newer vehicle. Not available with lease and some other offers. Must take new retail delivery by 06/30/2026. (See Trims)
  • See State Disclaimer *
Manufacturer Offer

Trade Assistance

  1. $2,500 Cash
  • Applies to this new 2026 GMC Sierra 1500

Disclaimer(s)
  • Must trade in a 2012 model year or newer vehicle. Not available with lease and some other offers. Must take new retail delivery by 06/30/2026. (See Trims)
  • See State Disclaimer *
Manufacturer Offer

GM First Responder Offer

  1. $500 Offer
  • Applies to this new 2026 GMC Sierra 1500

Disclaimer(s)
  • 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. Must take new retail delivery by 01/04/2027. (See Trims)
  • See State Disclaimer *
Manufacturer Offer

GM Military Offer

  1. $500 Offer
  • Applies to this new 2026 GMC Sierra 1500

Disclaimer(s)
  • 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. Must take new retail delivery by 01/04/2027. (See Trims)
  • See State Disclaimer *

Interested in a different GMC? Click a link below and find the GMC that fits your lifestyle.

 

GMC Acadia
GMC Canyon
GMC HUMMER EV
GMC Savana 2500
GMC Savana 3500
GMC Savana Cutaway
GMC Savana Cutaway 4500
GMC Sierra 1500
GMC Sierra 2500 HD
GMC Sierra 3500 HD
GMC Terrain
GMC Yukon
GMC Yukon XL
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