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- $44,882MSRP $51,755
- Exterior color: Onyx BlackOnyx Black
- Interior color: Jet Black clothJet Black cloth
- 6'7” bed, 5.3l, 8cyl
- O'Fallon Buick GMC (6 mi away)(2)
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Located in O'Fallon, MO / 6 miles away from O Fallon, MO
This NEW 2026 Onyx Black GMC Sierra 1500 Pro EcoTec3 5.3L V8 10-Speed Automatic 4WD is well equipped and includes these features and benefits: Conveni...
Features and Specs:
Listing Information:
VIN: 1GTRUAED8TZ129231
Stock: G26214
Listed since: 09-10-2025 - $44,240MSRP $51,065
- Exterior color: Onyx BlackOnyx Black
- Interior color: Jet Black clothJet Black cloth
- 6'7” bed, 5.3l, 8cyl
- O'Fallon Buick GMC (6 mi away)(2)
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Located in O'Fallon, MO / 6 miles away from O Fallon, MO
This NEW 2026 Onyx Black GMC Sierra 1500 Pro EcoTec3 5.3L V8 10-Speed Automatic 4WD is well equipped and includes these features and benefits: Conveni...
Features and Specs:
Listing Information:
VIN: 1GTRUAED9TZ278294
Stock: G26498
Listed since: 01-29-2026 - $44,101MSRP $50,915
- Exterior color: Onyx BlackOnyx Black
- Interior color: Jet Black vinylJet Black vinyl
- 6'7” bed, 5.3l, 8cyl
- O'Fallon Buick GMC (6 mi away)(2)
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Located in O'Fallon, MO / 6 miles away from O Fallon, MO
This NEW 2026 Onyx Black GMC Sierra 1500 Pro EcoTec3 5.3L V8 10-Speed Automatic 4WD is well equipped and includes these features and benefits: Standar...
Features and Specs:
Listing Information:
VIN: 1GTRUAEDXTZ275615
Stock: G26485
Listed since: 01-27-2026 - $48,523MSRP $55,670
- Exterior color: Summit WhiteSummit White
- Interior color: Jet Black clothJet Black cloth
- 5'10” bed, 5.3l, 8cyl
- O'Fallon Buick GMC (6 mi away)(2)
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Located in O'Fallon, MO / 6 miles away from O Fallon, MO
This NEW 2026 Summit White GMC Sierra 1500 Pro EcoTec3 5.3L V8 10-Speed Automatic 4WD is well equipped and includes these features and benefits: Stand...
Features and Specs:
Listing Information:
VIN: 1GTUUAED9TZ276426
Stock: G26639
Listed since: 03-23-2026 - $44,719MSRP $51,580
- Interior color: Jet Black clothJet Black cloth
- 6'7” bed, 5.3l, 8cyl
- O'Fallon Buick GMC (6 mi away)(2)
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Located in O'Fallon, MO / 6 miles away from O Fallon, MO
This NEW 2026 Dune GMC Sierra 1500 Pro EcoTec3 5.3L V8 10-Speed Automatic 4WD is well equipped and includes these features and benefits: Convenience P...
Features and Specs:
Listing Information:
VIN: 1GTRUAED2TZ278394
Stock: G26497
Listed since: 01-29-2026 - $44,473MSRP $51,315
- Exterior color: Sterling MetallicSterling Metallic
- Interior color: Jet Black clothJet Black cloth
- 6'7” bed, 5.3l, 8cyl
- O'Fallon Buick GMC (6 mi away)(2)
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Located in O'Fallon, MO / 6 miles away from O Fallon, MO
This NEW 2026 Sterling GMC Sierra 1500 Pro EcoTec3 5.3L V8 10-Speed Automatic 4WD is well equipped and includes these features and benefits: Convenien...
Features and Specs:
Listing Information:
VIN: 1GTRUAED1TZ318061
Stock: G26596
Listed since: 03-09-2026 - $65,874MSRP $75,275
- Exterior color: Onyx BlackOnyx Black
- Interior color: Jet Black w/Kalahari Accents leatherJet Black w/Kalahari Accents leather
- 5'10” bed, 6.2l, 8cyl
- O'Fallon Buick GMC (6 mi away)(2)
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Located in O'Fallon, MO / 6 miles away from O Fallon, MO
This NEW 2026 Onyx Black GMC Sierra 1500 AT4 EcoTec3 6.2L V8 10-Speed Automatic 4WD is well equipped and includes these features and benefits: AT4 Pre...
Features and Specs:
24 Combined MPG (22 City/26 Highway)
Listing Information:
VIN: 1GTUUEEL7TZ318185
Stock: G26606
Listed since: 03-10-2026 - $51,510MSRP $61,260
- Exterior color: Onyx BlackOnyx Black
- Interior color: Jet Black clothJet Black cloth
- 6'7” bed, 5.3l, 8cyl
- O'Fallon Buick GMC (6 mi away)(2)
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Located in O'Fallon, MO / 6 miles away from O Fallon, MO
This NEW 2026 Onyx Black GMC Sierra 1500 Elevation EcoTec3 5.3L V8 10-Speed Automatic 4WD is well equipped and includes these features and benefits: H...
Features and Specs:
Listing Information:
VIN: 1GTRUCED3TZ294857
Stock: G26552
Listed since: 02-16-2026 - $65,937MSRP $75,345
- Exterior color: Onyx BlackOnyx Black
- Interior color: Jet Black w/Kalahari Accents leatherJet Black w/Kalahari Accents leather
- 5'10” bed, 3l, 6cyl
- O'Fallon Buick GMC (6 mi away)(2)
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Located in O'Fallon, MO / 6 miles away from O Fallon, MO
This NEW 2026 Onyx Black GMC Sierra 1500 AT4 3.0L I6 10-Speed Automatic 4WD is well equipped and includes these features and benefits: AT4 Preferred P...
Features and Specs:
23 Combined MPG (21 City/24 Highway)
Listing Information:
VIN: 1GTUUEE86TZ282548
Stock: G26578
Listed since: 03-03-2026 - $65,874MSRP $75,275
- Exterior color: Coastal DuneCoastal Dune
- Interior color: Jet Black w/Kalahari Accents leatherJet Black w/Kalahari Accents leather
- 5'10” bed, 6.2l, 8cyl
- O'Fallon Buick GMC (6 mi away)(2)
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Located in O'Fallon, MO / 6 miles away from O Fallon, MO
This NEW 2026 Dune GMC Sierra 1500 AT4 EcoTec3 6.2L V8 10-Speed Automatic 4WD is well equipped and includes these features and benefits: AT4 Preferred...
Features and Specs:
Listing Information:
VIN: 1GTUUEEL8TZ324819
Stock: G26629
Listed since: 03-17-2026 - $67,318MSRP $74,385
- Exterior color: Summit WhiteSummit White
- Interior color: Jet Black w/Kalahari Accents leatherJet Black w/Kalahari Accents leather
- 5'10” bed, 6.2l, 8cyl
- O'Fallon Buick GMC (6 mi away)(2)
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Located in O'Fallon, MO / 6 miles away from O Fallon, MO
This NEW 2026 Summit White GMC Sierra 1500 AT4 EcoTec3 6.2L V8 10-Speed Automatic 4WD is well equipped and includes these features and benefits: Trail...
Features and Specs:
23 Combined MPG (21 City/24 Highway)
Listing Information:
VIN: 3GTUUEELXTG247189
Stock: G26553
Listed since: 02-17-2026 - Arriving Soon$78,830MSRP $88,130
- Exterior color: Sterling MetallicSterling Metallic
- Interior color: Alpine Umber premium leatherAlpine Umber premium leather
- 5'10” bed, 6.2l, 8cyl
- O'Fallon Buick GMC (6 mi away)(2)
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Located in O'Fallon, MO / 6 miles away from O Fallon, MO
This NEW 2026 Sterling GMC Sierra 1500 Denali Ultimate EcoTec3 6.2L V8 10-Speed Automatic 4WD is well equipped and includes these features and benefit...
Features and Specs:
16 Combined MPG (15 City/19 Highway)
Listing Information:
VIN: 1GTUUHEL2TZ333596
Stock: G26647
Listed since: 03-23-2026 - Arriving Soon$64,159MSRP $73,380
- Exterior color: Sterling MetallicSterling Metallic
- Interior color: Jet Black w/Kalahari Accents leatherJet Black w/Kalahari Accents leather
- 5'10” bed, 3l, 6cyl
- O'Fallon Buick GMC (6 mi away)(2)
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Located in O'Fallon, MO / 6 miles away from O Fallon, MO
Recent Arrival!This NEW 2026 Sterling GMC Sierra 1500 AT4 3.0L I6 10-Speed Automatic 4WD is well equipped and includes these features and benefits: ...
Features and Specs:
24 Combined MPG (22 City/26 Highway)
Listing Information:
VIN: 1GTUUEE85TZ345431
Stock: G26681
Listed since: 04-02-2026 - Arriving Soon$60,227MSRP $69,035
- Exterior color: Summit WhiteSummit White
- Interior color: Jet Black leatherJet Black leather
- 5'10” bed, 3l, 6cyl
- O'Fallon Buick GMC (6 mi away)(2)
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Located in O'Fallon, MO / 6 miles away from O Fallon, MO
This NEW 2026 Summit White GMC Sierra 1500 SLT 3.0L I6 10-Speed Automatic 4WD is well equipped and includes these features and benefits: High Capacity...
Features and Specs:
Listing Information:
VIN: 3GTUUDE80TG267957
Stock: G26514
Listed since: 03-13-2026 - $77,450MSRP $86,630
- Exterior color: Onyx BlackOnyx Black
- Interior color: Alpine Umber premium leatherAlpine Umber premium leather
- 5'10” bed, 3l, 6cyl
- O'Fallon Buick GMC (6 mi away)(2)
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Located in O'Fallon, MO / 6 miles away from O Fallon, MO
This NEW 2026 Onyx Black GMC Sierra 1500 Denali Ultimate 3.0L I6 10-Speed Automatic 4WD is well equipped and includes these features and benefits: Tra...
Features and Specs:
Listing Information:
VIN: 1GTUUHE85TZ326377
Stock: G26628
Listed since: 03-16-2026 - $56,849MSRP $67,665
- Exterior color: Onyx BlackOnyx Black
- Interior color: Jet Black leatherJet Black leather
- 5'10” bed, 5.3l, 8cyl
- O'Fallon Buick GMC (6 mi away)(2)
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Located in O'Fallon, MO / 6 miles away from O Fallon, MO
This NEW 2026 Onyx Black GMC Sierra 1500 SLT EcoTec3 5.3L V8 10-Speed Automatic 4WD is well equipped and includes these features and benefits: High Ca...
Features and Specs:
17 Combined MPG (15 City/19 Highway)
Listing Information:
VIN: 3GTUUDED5TG131708
Stock: G26186
Listed since: 09-12-2025 - $41,363MSRP $48,240
- Exterior color: Onyx BlackOnyx Black
- Interior color: Jet Black clothJet Black cloth
- 6'7” bed, 2.7l, 4cyl
- O'Fallon Buick GMC (6 mi away)(2)
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Located in O'Fallon, MO / 6 miles away from O Fallon, MO
This NEW 2026 Onyx Black GMC Sierra 1500 Pro 2.7L I4 Turbocharged DOHC 16V LEV3-SULEV30 310hp 8-Speed Automatic 4WD is well equipped and includes thes...
Features and Specs:
18 Combined MPG (17 City/19 Highway)
Listing Information:
VIN: 1GTRUAEK8TZ276017
Stock: G26489
Listed since: 01-27-2026 - Arriving Soon$79,382MSRP $88,730
- Exterior color: Glacier White TricoatGlacier White Tricoat
- Interior color: Alpine Umber premium leatherAlpine Umber premium leather
- 5'10” bed, 6.2l, 8cyl
- O'Fallon Buick GMC (6 mi away)(2)
Close
Located in O'Fallon, MO / 6 miles away from O Fallon, MO
Recent Arrival!This NEW 2026 White GMC Sierra 1500 Denali Ultimate EcoTec3 6.2L V8 10-Speed Automatic 4WD is well equipped and includes these featur...
Features and Specs:
16 Combined MPG (15 City/19 Highway)
Listing Information:
VIN: 1GTUUHEL6TZ344634
Stock: G26672
Listed since: 04-01-2026 - Arriving Soon$77,450MSRP $86,630
- Exterior color: Downpour MetallicDownpour Metallic
- Interior color: Alpine Umber premium leatherAlpine Umber premium leather
- 5'10” bed, 3l, 6cyl
- O'Fallon Buick GMC (6 mi away)(2)
Close
Located in O'Fallon, MO / 6 miles away from O Fallon, MO
Recent Arrival!This NEW 2026 Downpour Met GMC Sierra 1500 Denali Ultimate 3.0L I6 10-Speed Automatic 4WD is well equipped and includes these feature...
Features and Specs:
16 Combined MPG (15 City/19 Highway)
Listing Information:
VIN: 1GTUUHE83TZ348524
Stock: G26695
Listed since: 04-09-2026 - $80,256MSRP $89,680
- Exterior color: Glacier White TricoatGlacier White Tricoat
- Interior color: Alpine Umber premium leatherAlpine Umber premium leather
- 5'10” bed, 6.2l, 8cyl
- O'Fallon Buick GMC (6 mi away)(2)
Close
Located in O'Fallon, MO / 6 miles away from O Fallon, MO
This NEW 2026 Glacier White GMC Sierra 1500 Denali Ultimate EcoTec3 6.2L V8 10-Speed Automatic 4WD is well equipped and includes these features and be...
Features and Specs:
16 Combined MPG (15 City/19 Highway)
Listing Information:
VIN: 1GTUUHEL1TZ329927
Stock: G26634
Listed since: 03-18-2026 - $51,725MSRP $61,475
- Exterior color: Onyx BlackOnyx Black
- Interior color: Jet Black clothJet Black cloth
- 6'7” bed, 5.3l, 8cyl
- O'Fallon Buick GMC (6 mi away)(2)
Close
Located in O'Fallon, MO / 6 miles away from O Fallon, MO
This NEW 2026 Onyx Black GMC Sierra 1500 Elevation EcoTec3 5.3L V8 10-Speed Automatic 4WD is well equipped and includes these features and benefits: H...
Features and Specs:
Listing Information:
VIN: 1GTRUCED1TZ323787
Stock: G26623
Listed since: 03-16-2026
Showing 1 - 21 out of 826 listings
Consumer Reviews for the GMC Sierra 1500
Read recent reviews for the GMC Sierra 1500
Buy Ford
Gene, 01/30/2025
2024 GMC Sierra 1500 Pro 4dr Double Cab 4WD SB (2.7L 4cyl Turbo 8A)
Bought a new Sierra 1500 Denali…
Bought a new Sierra 1500 Denali Ultimate just over a year ago. 3200 miles into it engine went. In the shop for a month. It went back into the shop approximately 6 months later fo two recalls and needs to go back and in for some odd behavior with the transmission. Funny sound and showed it was in ‘off-road’ mode no matter what I did. That has now gone away … but who knows?
A little of my history before I continue, my father retired from GM Manufacturing, my stepfather, mother and most of my family worked for GM for many years in and around Saginaw, MI. So we have always been GM people.
Bottom line, never again. Not only did GMC not buy back this lemon, they really refused to do anything other than do the repairs.
Looks great, great bells and whistles, nice to interior. Piece of crap that the company will not acknowledge.
I will be a Ford buyer from here on out, even though I can buy GM through the family plan.
Thoroughly disappointed in what has become of this once great company.
All I can say is if you still choose to buy one of these vehicles, know your on your own.
Gene
PS: ignore trim details below. Did not have mine but will not let me change.
Date of experience: January 29, 2025
| Trim | MPG | Engine | Starting Price |
|---|---|---|---|
| 2026 GMC Sierra 1500 Pro 4dr Double Cab 4WD SB (5.3L 8cyl 10A) | N/A | 8-cylinders (gas) | $50,915 |
| 2026 GMC Sierra 1500 Pro 4dr Crew Cab 4WD 5.8 ft. SB (5.3L 8cyl 10A) | N/A | 8-cylinders (gas) | $55,670 |
| 2026 GMC Sierra 1500 AT4 4dr Crew Cab 4WD 5.8 ft. SB (6.2L 8cyl 10A) | 22 - 26 | 8-cylinders (gas) | $74,385 |
| 2026 GMC Sierra 1500 Elevation 4dr Double Cab 4WD SB (5.3L 8cyl 10A) | N/A | 8-cylinders (gas) | $61,260 |
| 2026 GMC Sierra 1500 AT4 4dr Crew Cab 4WD 5.8 ft. SB (3.0L 6cyl Turbodiesel 10A) | 21 - 24 | 6-cylinders (diesel) | $73,380 |
| 2026 GMC Sierra 1500 Denali Ultimate 4dr Crew Cab 4WD 5.8 ft. SB (6.2L 8cyl 10A) | 15 - 19 | 8-cylinders (gas) | $88,130 |
| 2026 GMC Sierra 1500 SLT 4dr Crew Cab 4WD 5.8 ft. SB (3.0L 6cyl Turbodiesel 10A) | N/A | 6-cylinders (diesel) | $69,035 |
| 2026 GMC Sierra 1500 Denali Ultimate 4dr Crew Cab 4WD 5.8 ft. SB (3.0L 6cyl Turbodiesel 10A) | N/A | 6-cylinders (diesel) | $86,630 |
| 2026 GMC Sierra 1500 SLT 4dr Crew Cab 4WD 5.8 ft. SB (5.3L 8cyl 10A) | 15 - 19 | 8-cylinders (gas) | $67,665 |
| 2026 GMC Sierra 1500 Pro 4dr Double Cab 4WD SB (2.7L 4cyl Turbo 8A) | 17 - 19 | 4-cylinders (gas) | $48,240 |
More about the GMC Sierra 1500
Edmunds has 826 New GMC Sierra 1500s for sale near you, including a 2026 Sierra 1500 Pro Pickup and a 2026 Sierra 1500 Denali Ultimate Pickup ranging in price from $48,240 to $89,680.
How much is a new 2026 GMC Sierra 1500 in O Fallon, MO?
- A new 2026 GMC Sierra 1500 starts at $48,240 (including destination charge) in O Fallon, MO. Prices will go up based on the trim level you choose and any options you add. Keep in mind that prices can also vary from one state to another and even from one dealership to the next.
How much does a 2026 GMC Sierra 1500 Double Cab cost in O Fallon, MO?
- A new 2026 GMC Sierra 1500 Double Cab starts at $48,240 in O Fallon, MO. Prices will vary depending on what trim level you choose. Each state may have different pricing, so make sure you enter your correct ZIP code on Edmunds.Other versions include:
2026 GMC Sierra 1500 Crew Cab which starts at $55,670.
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