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154 listings
- $43,735MSRP $44,485
- Exterior color: Downpour MetallicDownpour Metallic
- Interior color: After Dark leatherAfter Dark leather
- 5 Seats, 24 City / 28 Hwy MPG
- Suntrup Buick GMC (40 mi away)(2)
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Located in Saint Peters, MO / 40 miles away from O Fallon, IL
The GMC Terrain Denali is a 2026 automobile that is sure to turn heads. Boasting a powerful 1.5 liter 4 cylinder engine with turbocharging, this SUV 4...
Features and Specs:
25 Combined MPG (24 City/28 Highway)
Listing Information:
VIN: 3GKALZEGXTL196174
Stock: 53484
Listed since: 09-16-2025 - $36,640MSRP $37,390
- Exterior color: Volcanic Red TintcoatVolcanic Red Tintcoat
- Interior color: After DarkAfter Dark
- 5 Seats, 24 City / 28 Hwy MPG
- Suntrup Buick GMC (40 mi away)(2)
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Located in Saint Peters, MO / 40 miles away from O Fallon, IL
The GMC Terrain Elevation is a 2026 automobile that is sure to turn heads. It is powered by a 1.5 liter 4 cylinder engine with a turbocharged system, ...
Features and Specs:
25 Combined MPG (24 City/28 Highway)
Listing Information:
VIN: 3GKALUEGXTL234151
Stock: 53485
Listed since: 09-16-2025 - $35,190MSRP $35,940
- Exterior color: Ebony Twilight MetallicEbony Twilight Metallic
- Interior color: After Dark leatheretteAfter Dark leatherette
- 5 Seats, 26 City / 28 Hwy MPG
- Suntrup Buick GMC (40 mi away)(2)
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Located in Saint Peters, MO / 40 miles away from O Fallon, IL
The GMC Terrain Elevation is a 2026 Vehicle, made by GMC and featuring a 1.5 liter 4 cylinder engine with a turbocharged powertrain. This vehicle has ...
Features and Specs:
27 Combined MPG (26 City/28 Highway)
Listing Information:
VIN: 3GKALMEG9TL207913
Stock: 53461
Listed since: 08-15-2025 - $40,090MSRP $43,340
- Exterior color: Sterling MetallicSterling Metallic
- Interior color: After Dark leatherAfter Dark leather
- 5 Seats, 24 City / 28 Hwy MPG
- Suntrup Buick GMC (40 mi away)(2)
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Located in Saint Peters, MO / 40 miles away from O Fallon, IL
This 2026 GMC Terrain Denali is a 4x4 vehicle that is sure to turn heads. It has a 1.5 liter 4 cylinder engine with a turbocharger, giving it plenty o...
Features and Specs:
25 Combined MPG (24 City/28 Highway)
Listing Information:
VIN: 3GKALZEG1TL211760
Stock: 53470
Listed since: 08-25-2025 - $29,787MSRP $32,785
- Exterior color: Rapids MetallicRapids Metallic
- Interior color: After Dark clothAfter Dark cloth
- 5 Seats, 26 City / 28 Hwy MPG
- Laura Buick GMC (11 mi away)(15)
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Located in Collinsville, IL / 11 miles away from O Fallon, IL
#1 VOLUME BUICK-GMC DEALER IN THE NATION!! 1000+ NEW VEHICLES IN STOCK! HOME DELIVERY AVAILABLE! You could qualify for even more incentives, please ca...
Features and Specs:
27 Combined MPG (26 City/28 Highway)
Listing Information:
VIN: 3GKALMEG9SL319187
Stock: L253873
Listed since: 04-01-2025 - $32,785MSRP $34,885
- Exterior color: Rapids MetallicRapids Metallic
- Interior color: After Dark clothAfter Dark cloth
- 5 Seats, 24 City / 28 Hwy MPG
- Jim Trenary of Union (60 mi away)
- Home delivery*
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Located in Union, MO / 60 miles away from O Fallon, IL
Ask for Internet Sales. Come and See Jim Trenary Deal Makers. Restrictions may apply. Please see your internet sales associate for details.
Features and Specs:
25 Combined MPG (24 City/28 Highway)
Listing Information:
VIN: 3GKALUEG4TL141108
Stock: U26006
Listed since: 05-17-2025 - $39,885MSRP $41,985
- Exterior color: Riverstone MetallicRiverstone Metallic
- Interior color: Forest Storm w/Mahogany Accents leatherette/clothForest Storm w/Mahogany Accents leatherette/cloth
- 5 Seats, 24 City / 28 Hwy MPG
- Jim Trenary of Union (60 mi away)
- Home delivery*
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Located in Union, MO / 60 miles away from O Fallon, IL
Ask for Internet Sales. Come and See Jim Trenary Deal Makers. Restrictions may apply. Please see your internet sales associate for details.
Features and Specs:
25 Combined MPG (24 City/28 Highway)
Listing Information:
VIN: 3GKALYEG0TL124507
Stock: U26001
Listed since: 04-30-2025
Showing 148 - 154 out of 154 listings
Consumer Reviews for the GMC Terrain
Read recent reviews for the GMC Terrain
The Ultimate Terrain Tamer: 2025 GMC Terrain
Jdbutts, 02/27/2025
2025 GMC Terrain Elevation 4dr SUV (1.5L 4cyl Turbo CVT)
From the moment I got behind the wheel of my 2025 GMC Terrain AWD with the Technology Package, I knew I had made the right choice. This SUV is the perfect blend of style, capability, and cutting-edge features.
The all-wheel-drive system provides a confident and smooth ride, whether on highways or rougher terrain. The Technology Package takes the experience to the next level, with an … intuitive infotainment system, a crystal-clear head-up display, and advanced driver-assist features that make every drive feel effortless. The interior is both sleek and spacious, with premium materials that give it a luxury feel without the luxury price tag.
Whether navigating city streets or exploring the great outdoors, the 2025 GMC Terrain proves to be the perfect companion. This SUV isn’t just a vehicle—it’s an experience. GMC knocked it out of the park!
| Trim | MPG | Engine | Starting Price |
|---|---|---|---|
| 2026 GMC Terrain Denali 4dr SUV AWD (1.5L 4cyl Turbo 8A) | 24 - 28 | 4-cylinders (gas) | $43,340 |
| 2026 GMC Terrain Elevation 4dr SUV AWD (1.5L 4cyl Turbo 8A) | 24 - 28 | 4-cylinders (gas) | $34,885 |
| 2026 GMC Terrain Elevation 4dr SUV (1.5L 4cyl Turbo CVT) | 26 - 28 | 4-cylinders (gas) | $35,940 |
| 2025 GMC Terrain Elevation 4dr SUV (1.5L 4cyl Turbo CVT) | 26 - 28 | 4-cylinders (gas) | $32,785 |
| 2026 GMC Terrain AT4 4dr SUV AWD (1.5L 4cyl Turbo 8A) | 24 - 28 | 4-cylinders (gas) | $41,985 |
More about the GMC Terrain
Edmunds has 154 New GMC Terrains for sale near you, including a 2025 Terrain Elevation SUV and a 2026 Terrain Denali SUV ranging in price from $32,785 to $44,485.
How much is a new 2026 GMC Terrain in O Fallon, IL?
- A new 2026 GMC Terrain starts at $32,785 (including destination charge) in O Fallon, IL. 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 Terrain SUV cost in O Fallon, IL?
- A new 2026 GMC Terrain SUV starts at $32,785 in O Fallon, IL. 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.
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* Delivery of any kind does not apply to Alaska and Hawaii. Contact the dealer for delivery details, restrictions and costs.