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3,139 listings
- Price Drop$16,590great price$2,916 below market
- 99,674 miles
- No accidents, 1 owner, personal use only
- 5 Seats, 25 City / 28 Hwy MPG
- Park Maple City Dodge Chrysler Jeep Ram (383 mi away)
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Located in Hornell, NY / 383 miles away from South Portland, ME
Blue Emerald Metallic 2021 GMC Terrain SLT AWD 9-Speed Automatic 1.5L DOHCAWD, 2 USB Data Ports, 4-Wheel Disc Brakes, 6-Speaker Audio System Feature...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
26 Combined MPG (25 City/28 Highway)
Listing Information:
VIN: 3GKALVEV2ML360168
Stock: A60168
Certified Pre-Owned: No
Listed since: 04-04-2025 - Price Drop$16,999great price$2,438 below market
- 95,971 miles
- No accidents, 1 owner, personal use only
- 5 Seats, 25 City / 28 Hwy MPG
- Honda of Owings Mills (443 mi away)
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Located in Owings Mills, MD / 443 miles away from South Portland, ME
Onboard Communications System, iPod/MP3 Input, Back-Up Camera, All Wheel Drive, TRANSMISSION, 9-SPEED AUTOMATIC 9T45... Alloy Wheels, ENGINE, 1.5L TUR...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
26 Combined MPG (25 City/28 Highway)
Listing Information:
VIN: 3GKALTEV6ML356497
Stock: ML356497
Certified Pre-Owned: No
Listed since: 05-20-2025 - $19,595great price$2,550 below market
- 62,943 miles
- No accidents, 1 owner, rental vehicle
- 5 Seats, 25 City / 28 Hwy MPG
- Auto Haus of Irvington (284 mi away)
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Located in Irvington, NJ / 284 miles away from South Portland, ME
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: No
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
26 Combined MPG (25 City/28 Highway)
Listing Information:
VIN: 3GKALVEV0ML302625
Stock: ML302625
Certified Pre-Owned: No
Listed since: 01-02-2024 Appraise
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- $18,983good price$1,467 below market
- 83,834 miles
- No accidents, 1 owner, personal use only
- 5 Seats, 25 City / 28 Hwy MPG
- Bob Johnson Buick GMC South (372 mi away)
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Located in Henrietta, NY / 372 miles away from South Portland, ME
2021 GMC Terrain SLE AWD Terrain SLE, 1.5L DOHC, 9-Speed Automatic, AWD, Satin Steel Metallic, Jet Black Cloth, 110-Volt Power Outlet, 2 USB Data Port...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
26 Combined MPG (25 City/28 Highway)
Listing Information:
VIN: 3GKALTEV6ML319532
Stock: BS250620B
Certified Pre-Owned: No
Listed since: 04-28-2025 - $19,790good price$1,243 below market
- 57,405 miles
- No accidents, 2 owners, corporate fleet vehicle
- 5 Seats, 25 City / 28 Hwy MPG
- North End Motors (108 mi away)
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Located in Canton, MA / 108 miles away from South Portland, ME
Forward Emergency Braking (FEB), Distance Pacing Cruise Control, Rear View Camera, Apple CarPlay, Google Android Auto, Bluetooth Handsfree, Power Lift...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: No
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
26 Combined MPG (25 City/28 Highway)
Listing Information:
VIN: 3GKALVEV7ML300077
Stock: B23262
Certified Pre-Owned: No
Listed since: 04-04-2024 - Price Drop$23,895good price$1,576 below market
- 34,790 miles
- No accidents, 1 owner, personal use only
- 5 Seats, 25 City / 28 Hwy MPG
- McGovern GMC (114 mi away)
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Located in Westborough, MA / 114 miles away from South Portland, ME
Recent Arrival! McGovern GMC is proud to present this...Satin Steel Metallic 2021 GMC Terrain SLT 1.5L DOHC 9-Speed Automatic CARFAX One-Owner. Clean...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
26 Combined MPG (25 City/28 Highway)
Listing Information:
VIN: 3GKALVEV2ML326554
Stock: GM11549A
Certified Pre-Owned: No
Listed since: 04-07-2025 - $21,590good price$977 below market
- 29,021 miles
- No accidents, 1 owner, personal use only
- 5 Seats, 26 City / 30 Hwy MPG
- Vision Buick GMC (363 mi away)
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Located in Rochester, NY / 363 miles away from South Portland, ME
New Price! Odometer is 19724 miles below market average!**CLEAN CAR FAX**, **VISION BUICK GMC**, **GM CERTIFIED 12 MONTH/ 12K MILE WARRANTY**, **THIS ...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
27 Combined MPG (26 City/30 Highway)
Listing Information:
VIN: 3GKALMEV7ML375758
Stock: B5T321657A
Certified Pre-Owned: No
Listed since: 05-01-2025 - $23,998good price$843 below market
- 16,404 miles
- No accidents, 1 owner, personal use only
- 5 Seats, 25 City / 28 Hwy MPG
- CarMax Laurel (459 mi away)
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Located in Laurel, MD / 459 miles away from South Portland, ME
CarMax values transparency and wants you to love your next car, not settle on it. Certain vehicles may have unrepaired safety recalls. Check nhtsa.gov...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: Yes
Features and Specs:
26 Combined MPG (25 City/28 Highway)
Listing Information:
VIN: 3GKALTEV9ML313739
Stock: 27364914
Certified Pre-Owned: No - $19,429fair price$285 above market
- 83,250 miles
- No accidents, 1 owner, personal use only
- 5 Seats, 25 City / 28 Hwy MPG
- Lancaster County Motors Subaru (396 mi away)
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Located in Lancaster, PA / 396 miles away from South Portland, ME
Clean CARFAX. Terrain SLE Carfax One Owner! *PROFESSIONALLY DETAILED INSIDE AND OUT* *NEW OIL AND FILTER CHANGE* LOCAL TRADE 8-Way Power Driver Seat A...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
26 Combined MPG (25 City/28 Highway)
Listing Information:
VIN: 3GKALTEVXML318156
Stock: S52916A
Certified Pre-Owned: No
Listed since: 04-18-2025 - Price Drop$20,610fair price$383 below market
- 38,583 miles
- No accidents, 1 owner, personal use only
- 5 Seats, 25 City / 28 Hwy MPG
- McGee Mazda of Claremont (105 mi away)
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Located in Claremont, NH / 105 miles away from South Portland, ME
Recent Arrival!AWD, Alloy wheels, Apple CarPlay/Android Auto, Electronic Stability Control, Exterior Parking Camera Rear, Heated door mirrors, Lane ...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
26 Combined MPG (25 City/28 Highway)
Listing Information:
VIN: 3GKALTEV4ML329282
Stock: TM25081
Certified Pre-Owned: No
Listed since: 06-10-2025 - $24,989fair price$105 below market
- 22,012 miles
- No accidents, 2 owners, personal use
- 5 Seats, 25 City / 28 Hwy MPG
- O'Neil GMC (341 mi away)
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Located in Warminster, PA / 341 miles away from South Portland, ME
This 2021 GMC Terrain SLE in Ebony Twilight Metallic features: 1.5L DOHC 9-Speed Automatic AWD Clean CARFAX. Certified.GMC Certified Pre-Owned Detail...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
26 Combined MPG (25 City/28 Highway)
Listing Information:
VIN: 3GKALTEV4ML400142
Stock: 99-9347B
Certified Pre-Owned: Yes
Listed since: 04-12-2025 - $23,739fair price$384 below market
- 23,145 miles
- No accidents, corporate fleet vehicle
- 5 Seats, 25 City / 28 Hwy MPG
- Bob Johnson Chrysler Dodge Jeep Ram of Avon (376 mi away)
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Located in Avon, NY / 376 miles away from South Portland, ME
2021 GMC Terrain SLE*Best Price in Market*, *Best Value in Market*, Apple Carplay & Andriod Auto, Backup Camera, Bluetooth, Lane Departure Warning, Pr...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: No
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
26 Combined MPG (25 City/28 Highway)
Listing Information:
VIN: 3GKALTEV3ML300551
Stock: GVD4754
Certified Pre-Owned: No
Listed since: 05-29-2025 - Price Drop$22,498fair price$336 above market
- 62,985 miles
- No accidents, 1 owner, personal use only
- 5 Seats, 25 City / 28 Hwy MPG
- Handy Buick GMC (162 mi away)
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Located in Saint Albans, VT / 162 miles away from South Portland, ME
CARFAX One-Owner. Clean CARFAX.AWD, Recently Traded In, AWD, 8-Way Power Driver Seat Adjuster, AM/FM radio: SiriusXM, Apple CarPlay/Android Auto, Auto...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
26 Combined MPG (25 City/28 Highway)
Listing Information:
VIN: 3GKALVEV6ML367513
Stock: 17016A
Certified Pre-Owned: No
Listed since: 04-28-2025 - Price Drop$20,900fair price$667 below market
- 61,417 miles
- No accidents, 1 owner, personal use only
- 5 Seats, 25 City / 28 Hwy MPG
- Driveway (182 mi away)
- Home delivery*
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Located in Troy, NY / 182 miles away from South Portland, ME
CarFax No Accidents Reported,CarFax 1-Owner,Apple CarPlay,Back-Up Camera,Bluetooth,Hands-Free Liftgate,Heated Seats,Heated Steering Wheel,Keyless Star...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
26 Combined MPG (25 City/28 Highway)
Listing Information:
VIN: 3GKALVEV6ML390466
Stock: ML390466P
Certified Pre-Owned: No - Price Drop$22,000good price$947 below market
- 37,847 miles
- No accidents, 1 owner, personal use only
- 5 Seats, 25 City / 28 Hwy MPG
- Joe Cecconi's Chrysler Complex (438 mi away)
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Located in Niagara Falls, NY / 438 miles away from South Portland, ME
Ask for a Carfax vehicle history report on any of our used vehicles in inventory. All of our used vehicles are thoroughly reconditioned, with new brak...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
26 Combined MPG (25 City/28 Highway)
Listing Information:
VIN: 3GKALTEV0ML365972
Stock: 10396A
Certified Pre-Owned: No
Listed since: 05-24-2025 - $23,610fair price$181 below market
- 26,561 miles
- No accidents, 2 owners, personal use
- 5 Seats, 26 City / 30 Hwy MPG
- O'Neil GMC (341 mi away)
Close
Located in Warminster, PA / 341 miles away from South Portland, ME
This 2021 GMC Terrain SLE in Quicksilver Metallic features: 1.5L DOHC 9-Speed Automatic FWD Clean CARFAX. Certified.GMC Certified Pre-Owned Details:...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
27 Combined MPG (26 City/30 Highway)
Listing Information:
VIN: 3GKALMEV0ML401567
Stock: 99-9548A
Certified Pre-Owned: Yes
Listed since: 05-31-2025 - New Listing$22,924good price$1,152 below market
- 48,932 miles
- 1 accident, 1 owner, personal use
- 5 Seats, 25 City / 28 Hwy MPG
- Ingersoll Auto of Danbury (221 mi away)
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Located in Danbury, CT / 221 miles away from South Portland, ME
CARFAX One-Owner. Terrain SLT, 1.5L DOHC, AWD, Adaptive Cruise Control, Apple CarPlay/Android Auto, Black GMC Center Caps w/Black GMC Lettering, Black...
AutoCheck Vehicle History Summary
Accident Free Vehicle: No
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
26 Combined MPG (25 City/28 Highway)
Listing Information:
VIN: 3GKALVEVXML354201
Stock: T354201
Certified Pre-Owned: No
Listed since: 06-14-2025 - New Listing$19,999fair price$787 below market
- 64,597 miles
- No accidents, 2 owners, rental vehicle
- 5 Seats, 25 City / 28 Hwy MPG
- Maguire Chevrolet Ithaca (322 mi away)
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Located in Ithaca, NY / 322 miles away from South Portland, ME
Recent Arrival!Maguire Chevrolet Cadillac of Ithaca is honored to offer this attractive 2021 GMC Terrain Ebony Twilight Metallic SLT with the followin...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: No
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
26 Combined MPG (25 City/28 Highway)
Listing Information:
VIN: 3GKALVEV9ML337132
Stock: XM4502W
Certified Pre-Owned: No
Listed since: 05-10-2025 - New Listing$21,791fair price$587 above market
- 63,000 miles
- No accidents, 1 owner, personal use only
- 5 Seats, 25 City / 28 Hwy MPG
- Portsmouth Chevrolet (45 mi away)
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Located in Portsmouth, NH / 45 miles away from South Portland, ME
Recent Arrival! 2021 GMC Terrain SLE 1.5L DOHC Ebony Twilight MetallicAWD.We believe there is more to buying a vehicle than worrying about the price. ...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
26 Combined MPG (25 City/28 Highway)
Listing Information:
VIN: 3GKALTEV8ML375309
Stock: CH4243A
Certified Pre-Owned: No
Listed since: 06-17-2025 - New Listing$24,995fair price$388 below market
- 31,401 miles
- 1 accident, 2 owners, personal use only
- 5 Seats, 25 City / 28 Hwy MPG
- McGee Toyota of Putnam (142 mi away)
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Located in Putnam, CT / 142 miles away from South Portland, ME
McGee Toyota of Putnam is proud to present you with this 2021 GMC Terrain SLT! ---------- AWD, 1.5L I-4 TURBO ENGINE, 9-SPEED AUTOMATIC TRANSMIS...
AutoCheck Vehicle History Summary
Accident Free Vehicle: No
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
26 Combined MPG (25 City/28 Highway)
Listing Information:
VIN: 3GKALVEVXML377509
Stock: TR3320
Certified Pre-Owned: No
Listed since: 06-02-2025 - $22,899fair price$604 above market
- 64,751 miles
- No accidents, 1 owner, personal use only
- 5 Seats, 25 City / 28 Hwy MPG
- Garber Honda (371 mi away)
Close
Located in Rochester, NY / 371 miles away from South Portland, ME
Clean CARFAX. CARFAX One-Owner. AWD, back-up camera, active Bluetooth, leather interior, Alloy wheels, Heated front seats, Power driver seat, Power Li...
AutoCheck Vehicle History Summary
Accident Free Vehicle: Yes
Personal Use Only: Yes
History Provider: AutoCheck
Title Details: Clean Title
Salvage Vehicle: No
Frame Damage: No
Theft History: No
Lemon Status: No
Free History Report: No
Features and Specs:
26 Combined MPG (25 City/28 Highway)
Listing Information:
VIN: 3GKALVEV5ML301731
Stock: 11301731T
Certified Pre-Owned: No
Listed since: 05-27-2025
Showing 1 - 21 out of 3,139 listings
Consumer Reviews for the GMCÂ Terrain
Read recent reviews for the GMCÂ Terrain
2021 GMV Terrain SLT
Stgcret, 04/19/2021
2021 GMC Terrain SLT 4dr SUV (1.5L 4cyl Turbo 9A)
As of today, April 19/2023 I still own my Terrain purchased in November 2020. It has, so far, not given me a minute's issue.
The 1.5L Turbo is "okay" but the 2.0L Turbo is so much better. The Terrain is a very well thought out vehicle. Back seat flip flat at the push of a button and easily clicks back in to place. Seats are at hip height, which at 71, makes them very easy to slide … in and out. The front bucket seats are fairly comfortable with many power adjustments. The front seats could use another 1/2" to 1" of width. I would buy this beauty again.
UPDATE: I purchase my 2021 GMC Terrain brand new in November 2020 before the chip shortage, that isn't an issue with the 2021 at all. I just hit 20,000 miles a couple of weeks ago and all-in-all has been a pleasure to drive. I'm a big guy of 6' 2" and 285 and I easily slide in and out of my Terrain. Quiet ride and efficient and peppy 1.5L Turbo motor, although I would have preferred the 2.0L Turbo like I had in my 2018 Terrain, but the 2020 was the last year for the 2.0L
On the SLT, that I have, are many positions to adjust the front seat and I do prefer the leather over cloth seats. For a 2-row seat SUV, there is plenty of room and the seats fold down at the touch of button or pull that works with the effort of one finger. I really like the info system and Sirius Radio. I have not used the Navigation or phone interface because I just don't need to. One oddball fact I discovered though is that when you want to take out the Cabin Filter, you have to use a 5.5 mm socket and that size is difficult to find. They need to go to a more conventional size like a 6 mm or 1/4 inch.
UPDATE: I drove my 2021 Terrain SLT Elevation Edition out of the dealer showroom on 11/27/2020. I am 6' 2" and 72 yrs old. I specifically like the way I can slide in and easily slide out of the Terrain. I also find the front seat very comfortable and easy to adjust and has a nice lumbar support. I don't find the road noise so bad, but maybe that is because I have Talk Radio on all the time. I do agree that a 2.0 Turbo would be a better engine option. I owned a 2018 Terrain Denali with the 2.0L and I thought I was in a rocket when I stepped on the gas. I have owned my 2021 for 31 months now and have put 21,530 miles on the ol' girl and have not had a single issue, but there was one "what were they thinking moment" the screw for the driving compartment air filter is a 5.5 mm! I did change that filter at 18,000 miles although the manual called for 30,000 miles. Such an odd and hard to find size. I have changed the oil and filter every 5,000 miles and rotated the tires.
I would like to see the same vehicle but 10" to 12" longer and maybe 4" to 6" wider to fit just a bit more beefy seat like the Tahoe has. Other than that I will most likely buy another Terrain and for sure if they reinstate the 2.0L Turbo.
Used 2021 GMC Terrain in South Portland, ME Values
Estimated values
2021 GMC Terrain SLT 4dr SUV AWD (1.5L 4cyl Turbo 9A) with no options
| Condition | Trade-In | Private Party | Dealer Retail |
|---|---|---|---|
| Outstanding | $18,099 | $20,216 | $22,340 |
| Clean | $17,713 | $19,776 | $21,842 |
| Average | $17,071 | $19,041 | $21,011 |
| Rough | $16,236 | $18,087 | $19,932 |
The average list price of a used 2021 GMC Terrain in South Portland, Maine is $21,515. The average mileage on a used GMC Terrain 2021 for sale in South Portland, Maine is 52,787. Based on the average mileage of 52,787 for used 2021 GMC Terrain for sale in South Portland, ME and using an average vehicle condition rating, which means the vehicle may have a few mechanical and/or cosmetic problems and may require a considerable amount of reconditioning, we appraise the average trade-in value of a used GMC Terrain 2021 in South Portland, Maine to be $17,071.
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