2026 GMC Sierra 1500 For Sale

Prices starting at: $38,300

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

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2026 GMC Sierra 1500 Truck

2026 GMC Sierra 1500 Truck Woodland Green

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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 SLT

MSRP$69,035
Discount$6,558
Price$62,477
Doc Fee$599
Final Price$60,076
Offers$3,000
Final Price$60,076
Conditional Offers$4,000

Engine: 3.0L Duramax^® Turbo Diesel engine, Transmission: Automatic, Exterior Color: Summit White, Interior Color: Jet Black, Perforated leather-appointed front outb

2026 GMC Sierra 1500 Truck

2026 GMC Sierra 1500 Elevation

MSRP$64,010
Discount$6,500
Featured Price $57,510
Add-On$3,495
Price$61,005
Doc Fee$599
Final Price$57,604
Offers$4,000
Final Price$57,604
Conditional Offers$4,000

Engine: 5.3L EcoTec3 V8 engine, Transmission: Automatic, Exterior Color: Summit White, Interior Color: Jet Black, Cloth seat trim

2026 GMC Sierra 1500 Truck

2026 GMC Sierra 1500 Elevation

MSRP$64,505
Discount$6,500
Price$58,005
Doc Fee$599
Final Price$54,604
Offers$4,000
Final Price$54,604
Conditional Offers$4,000

Engine: 5.3L EcoTec3 V8 engine, Transmission: Automatic, Exterior Color: Onyx Black, Interior Color: Jet Black, Cloth seat trim

2026 GMC Sierra 1500 Truck

2026 GMC Sierra 1500 Elevation

MSRP$66,860
Discount$6,500
Price$60,360
Doc Fee$599
Final Price$56,959
Offers$4,000
Final Price$56,959
Conditional Offers$4,000

Engine: 5.3L EcoTec3 V8 engine, Transmission: Automatic, Exterior Color: Onyx Black, Interior Color: Jet Black, Cloth seat trim

2026 GMC Sierra 1500 Elevation

MSRP$66,860
Discount$6,500
Price$60,360
Doc Fee$599
Final Price$56,959
Offers$4,000
Final Price$56,959
Conditional Offers$4,000

Engine: 5.3L EcoTec3 V8 engine, Transmission: Automatic, Exterior Color: Sterling Metallic, Interior Color: Jet Black, Cloth seat trim

2026 GMC Sierra 1500 Denali

MSRP$76,355
Discount$7,254
Price$69,101
Doc Fee$599
Final Price$66,700
Offers$3,000
Final Price$66,700
Conditional Offers$4,000

Engine: 3.0L Duramax^® Turbo Diesel engine, Transmission: Automatic, Exterior Color: Glacier White Tricoat, Interior Color: Jet Black, Forge perforated leather seat trim

2026 GMC Sierra 1500 Denali

MSRP$78,880
Discount$7,494
Price$71,386
Doc Fee$599
Final Price$68,985
Offers$3,000
Final Price$68,985
Conditional Offers$4,000

Engine: 3.0L Duramax^® Turbo Diesel engine, Transmission: Automatic, Exterior Color: Glacier White Tricoat, Interior Color: Jet Black, Forge perforated leather seat trim

2026 GMC Sierra 1500 Denali Ultimate

MSRP$87,230
Discount$6,978
Price$80,252
Doc Fee$599
Final Price$77,851
Offers$3,000
Final Price$77,851
Conditional Offers$4,000

Engine: 3.0L Duramax^® Turbo Diesel engine, Transmission: Automatic, Exterior Color: Glacier White Tricoat, Interior Color: Alpine Umber, Full grain leather front seat trim

2026 GMC Sierra 1500 SLT

MSRP$70,230
Discount$6,672
Price$63,558
Doc Fee$599
Final Price$60,157
Offers$4,000
Final Price$60,157
Conditional Offers$5,000

Engine: 6.2L EcoTec3 V8 engine, Transmission: Automatic, Exterior Color: Onyx Black, Interior Color: Jet Black, Perforated leather-appointed front outb

2026 GMC Sierra 1500 Denali

MSRP$75,755
Discount$7,197
Price$68,558
Doc Fee$599
Final Price$66,157
Offers$3,000
Final Price$66,157
Conditional Offers$4,000

Engine: 3.0L Duramax^® Turbo Diesel engine, Transmission: Automatic, Exterior Color: Onyx Black, Interior Color: Jet Black, Forge perforated leather seat trim

View All New GMC Sierra 1500

2023 GMC Sierra 1500 AT4

Price$40,000
Doc Fee$599
Final Price$40,599

Engine: 3.0L Duramax^® Turbo Diesel engine, Transmission: Automatic, Mileage: 67,678 miles, Exterior Color: Dynamic Blue Metallic, Interior Color: Jet Black with Kalahari accents, Perforated leathe

2023 GMC Sierra 1500 SLT

Price$39,000
Doc Fee$599
Final Price$39,599

Engine: 3.0L Duramax^® Turbo Diesel engine, Transmission: Automatic, Mileage: 51,983 miles, Exterior Color: Onyx Black, Interior Color: JET BLACK, PERFORATED LEATHER-APPOINTED FRONT OUTB

2026 GMC Sierra 1500 AT4

Price$58,500
Doc Fee$599
Final Price$59,099

Engine: 6.2L EcoTec3 V8 engine, Transmission: Automatic, Mileage: 8,020 miles, Exterior Color: Summit White, Interior Color: Jet Black with Kalahari accents, Perforated leathe

2016 GMC Sierra 1500 SLT

Price$23,000
Doc Fee$599
Final Price$23,599

Engine: 5.3L Engine: , V-8, SIDI, Active Fuel Mgt, Transmission: Automatic, Mileage: 109,468 miles, Exterior Color: Summit White, Interior Color: COCOA/DUNE, LEATHER-APPOINTED FRONT SEAT TRIM

2010 GMC Sierra 1500 SLT

Price$13,000
Doc Fee$599
Final Price$13,599

Engine: 5.3L Engine: , V-8, Flex Fuel, SFI, Transmission: Automatic, Mileage: 143,503 miles, Exterior Color: Laser Blue Metallic, Interior Color: EBONY, LEATHER-APPOINTED FRONT SEATS

2023 GMC Sierra 1500 Denali Ultimate

Price$51,700
Doc Fee$599
Final Price$52,299

Engine: 6.2L EcoTec3 V8 engine, Transmission: Automatic, Mileage: 51,602 miles, Exterior Color: White Frost Tricoat, Interior Color: ALPINE UMBER, FORGE PERFORATED LEATHER SEAT TRIM

2025 GMC Sierra 1500 AT4

Price$49,000
Doc Fee$599
Final Price$49,599

Engine: 6.2L EcoTec3 V8 engine, Transmission: Automatic, Mileage: miles, Exterior Color: Summit White, Interior Color: Jet Black with Kalahari accents, Perforated leathe

View All Pre-Owned GMC Sierra 1500

GMC (1)

Sierra 1500 Truck (16)

2026

Manufacturer Offer

No Monthly Payments Until Next Year for Well-Qualified Buyers When Financed w/ GM Financial

0.0% APR for 36 months
0.0% APR for 48 months
0.0% APR for 60 months
2.9% APR for 72 months

Applies to this new 2026 GMC Sierra 1500

Offer only valid Oct 01, 2026 through Nov 02, 2026

No Monthly Payments Until Next Year for Well-Qualified Buyers When Financed w/ GM Financial

Disclaimer(s)

Deferred monthly payments until 2027. 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%. This is a standalone APR incentive program and not available with lease and some other offers. Must take new retail delivery by 11/02/2026. 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 36 months corresponds to a monthly cost of $27.78 per $1000 financed. 0.0% APR for a term of 48 months corresponds to a monthly cost of $20.83 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 Until Next Year for Well-Qualified Buyers When Financed w/ GM Financial

0.0% APR for 36 months
0.0% APR for 48 months
0.0% APR for 60 months
2.9% APR for 72 months

Applies to this new 2026 GMC Sierra 1500

Offer only valid Sep 30, 2026 through Nov 02, 2026

No Monthly Payments Until Next Year for Well-Qualified Buyers When Financed w/ GM Financial

Disclaimer(s)

Deferred monthly payments until 2027. 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%. This is a standalone APR incentive program and not available with lease and some other offers. Must take new retail delivery by 11/02/2026. 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 36 months corresponds to a monthly cost of $27.78 per $1000 financed. 0.0% APR for a term of 48 months corresponds to a monthly cost of $20.83 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 Until Next Year for Well-Qualified Buyers When Financed w/ GM Financial

Applies to this new 2026 GMC Sierra 1500

Offer only valid Oct 01, 2026 through Nov 02, 2026

No Monthly Payments Until Next Year for Well-Qualified Buyers When Financed w/ GM Financial

Disclaimer(s)

Deferred monthly payments until 2027. 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%. This is a standalone APR incentive program and not available with lease and some other offers. Must take new retail delivery by 11/02/2026. 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. 6.9% APR for a term of 75 months corresponds to a monthly cost of $16.45 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 Until Next Year for Well-Qualified Buyers When Financed w/ GM Financial

Applies to this new 2026 GMC Sierra 1500

Offer only valid Sep 30, 2026 through Nov 02, 2026

No Monthly Payments Until Next Year for Well-Qualified Buyers When Financed w/ GM Financial

Disclaimer(s)

Deferred monthly payments until 2027. 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. APR for for well-qualified buyers when financed w/GM Financial. Monthly payment is for every $1000 you finance. Average example down payment is . Not available with leases and some other offers. Must take new retail delivery by 11/02/2026. 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. 6.9% APR for a term of 75 months corresponds to a monthly cost of $16.45 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

Bonus Cash

$2,500 Cash

Applies to this new 2026 GMC Sierra 1500

Offer only valid Sep 30, 2026 through Nov 02, 2026

Disclaimer(s)

Not available with some other offers. Must take new retail delivery by 11/02/2026. (See Trims)
See State Disclaimer *

Manufacturer Offer

Bonus Cash

$1,750 Cash

Applies to this new 2026 GMC Sierra 1500

Offer only valid Sep 30, 2026 through Nov 02, 2026

Disclaimer(s)

Not available with some other offers. Must take new retail delivery by 11/02/2026. (See Trims)
See State Disclaimer *

Manufacturer Offer

Bonus Cash

$1,500 Cash

Applies to this new 2026 GMC Sierra 1500

Offer only valid Sep 30, 2026 through Nov 02, 2026

Disclaimer(s)

Not available with some other offers. Must take new retail delivery by 11/02/2026. (See Trims)
See State Disclaimer *

Manufacturer Offer

Purchase Allowance

$1,500 Cash

Applies to this new 2026 GMC Sierra 1500

Offer only valid Sep 30, 2026 through Nov 02, 2026

Disclaimer(s)

Not available with special financing, lease and some other offers. Must take new retail delivery by 11/02/2026. (See Trims)
See State Disclaimer *

Manufacturer Offer

Bonus Cash

$1,000 Cash

Applies to this new 2026 GMC Sierra 1500

Offer only valid Oct 01, 2026 through Nov 02, 2026

Disclaimer(s)

Not available with some other offers. Must take new retail delivery by 11/02/2026. (See Trims)
See State Disclaimer *

Manufacturer Offer

Bonus Cash

$500 Cash

Applies to this new 2026 GMC Sierra 1500

Offer only valid Sep 30, 2026 through Nov 02, 2026

Disclaimer(s)

Not available with some other offers. Must take new retail delivery by 11/02/2026. (See Trims)
See State Disclaimer *

Manufacturer Offer

SCR GMC Lease

Applies to this new 2026 GMC Sierra 1500.

Offer only valid Oct 01, 2026 through Nov 02, 2026

Ultra Low-Mileage Lease for Well-Qualified Lessees. $349/month for 24 months. For Everyone: $7,679 due at signing (after all offers).* $0 security deposit. For Current Lessees of 2021 model year or newer select GM vehicles : $5,429 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)

*Example based on survey. 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 $7,679 (after all offers). 24 monthly payments total $8,376. Option to purchase at lease end for an amount to be determined at lease signing. Lessor must approve lease. Take new retail delivery by 11-02-2026. 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. **For Current 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 : Payments are based on an MSRP of $60,990. Based on due at signing amount of $5,429 (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 11-02-2026. 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

$4,000 Cash

Applies to this new 2026 GMC Sierra 1500

Offer only valid Sep 30, 2026 through Nov 02, 2026

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 11/02/2026. (See Trims)
See State Disclaimer *

Manufacturer Offer

Trade Assistance

$3,500 Cash

Applies to this new 2026 GMC Sierra 1500

Offer only valid Sep 30, 2026 through Nov 02, 2026

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 11/02/2026. (See Trims)
See State Disclaimer *

Manufacturer Offer

Trade Assistance

$3,000 Cash

Applies to this new 2026 GMC Sierra 1500

Offer only valid Sep 30, 2026 through Nov 02, 2026

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 11/02/2026. (See Trims)
See State Disclaimer *

Manufacturer Offer

GM First Responder Offer

$500 Offer

Applies to this new 2026 GMC Sierra 1500

Offer only valid Jan 03, 2026 through Jan 04, 2027

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

$500 Offer

Applies to this new 2026 GMC Sierra 1500

Offer only valid Jan 03, 2026 through Jan 04, 2027

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 *

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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