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1,564 listings
  • $18,497
    great price
    $2,497 below market
    • 79,755 miles
    • No accidents, 1 owner, personal use only
    • 5 Seats, 26 City / 30 Hwy MPG
    • EchoPark Automotive Atlanta (Duluth) (154 mi away)
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Duluth, GA / 154 miles away from Birmingham, AL

    At EchoPark, it’s all about offering you options for a happy experience. We have thousands of new-to-you makes and models that range from sedans to tr...

    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:

    28 Combined MPG (26 City/30 Highway)

    Listing Information:

    VIN: 3GKALPEV3ML342421
    Stock: CML342421
    Certified Pre-Owned: No
    Listed since: 04-18-2025

  • New Listing
    $24,998
    great price
    $2,398 below market
    • 16,959 miles
    • 5 Seats, 26 City / 30 Hwy MPG
    • CarMax Norcross (150 mi away)
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Norcross, GA / 150 miles away from Birmingham, AL

    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 Unavailable.

    Features and Specs:

    28 Combined MPG (26 City/30 Highway)

    Listing Information:

    VIN: 3GKALPEV8ML398130
    Stock: 27448328
    Certified Pre-Owned: No

  • Price Drop
    $21,488
    fair price
    $488 below market
    • 57,575 miles
    • No accidents, 1 owner, personal use only
    • 5 Seats, 26 City / 30 Hwy MPG
    • Countryside Chrysler Dodge Jeep Ram of Madison (188 mi away)
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    • Keyless Entry/Start
    Close

    Located in Madison, GA / 188 miles away from Birmingham, AL

    Vehicle DetailsDiscover the perfect blend of style, comfort, and performance with this exceptional 2021 GMC Terrain SLT. This meticulously mai...

    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:

    28 Combined MPG (26 City/30 Highway)

    Listing Information:

    VIN: 3GKALPEV5ML361200
    Stock: 2P2233
    Certified Pre-Owned: No
    Listed since: 04-28-2025

  • Price Drop
    $20,300
    good price
    $837 below market
    • 28,679 miles
    • No accidents, 1 owner, personal use
    • 5 Seats, 26 City / 30 Hwy MPG
    • Serra Hyundai (7 mi away)
    • Home delivery*
    • Back-up camera
    • Bluetooth
    • Keyless Entry/Start
    • Upgraded Headlights
    • Power Driver Seat
    Close

    Located in Trussville, AL / 7 miles away from Birmingham, AL

    **Come see what everyone is talking about. Ask about our Serra Platinum Package**.**Largest Certified Inventory in the State!**Odometer is 40867 ...

    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: 3GKALMEV1ML388599
    Stock: T388599
    Certified Pre-Owned: No
    Listed since: 05-20-2025

  • Price Drop
    $19,165
    good price
    $607 below market
    • 36,324 miles
    • No accidents, 1 owner, personal use only
    • 5 Seats, 26 City / 30 Hwy MPG
    • Serra Chevrolet (6 mi away)
    • Back-up camera
    • Bluetooth
    • Keyless Entry/Start
    • Upgraded Headlights
    • Tire Pressure Warnin...
    Close

    Located in Birmingham, AL / 6 miles away from Birmingham, AL

    Clean CARFAX. Graphite Gray Metallic 2021 GMC Terrain SLE FWD 9-Speed Automatic 1.5L DOHC25/30 City/Highway MPGExperience the Serra Promise - it'...

    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: 3GKALMEV9ML388074
    Stock: C187163A
    Certified Pre-Owned: No
    Listed since: 03-25-2025

  • New Listing
    $22,998
    fair price
    $162 below market
    • 55,959 miles
    • No accidents, 1 owner, personal use only
    • 5 Seats, 26 City / 30 Hwy MPG
    • CarMax Warner Robins (189 mi away)
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Keyless Entry/Start
    • Upgraded Headlights
    Close

    Located in Warner Robins, GA / 189 miles away from Birmingham, AL

    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: No

    Features and Specs:

    28 Combined MPG (26 City/30 Highway)

    Listing Information:

    VIN: 3GKALPEV7ML399611
    Stock: 26828282
    Certified Pre-Owned: No

  • Stock photo**
    $21,308
    fair price
    $473 below market
    • 63,688 miles
    • 1 accident, 1 owner, personal use only
    • 5 Seats, 26 City / 30 Hwy MPG
    • John Thornton Buick GMC (96 mi away)
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Carrollton, GA / 96 miles away from Birmingham, AL

    Recent Arrival! Thank you for considering this beautiful 2021 GMC Terrain SLT finished in stunning Quicksilver Metallic with Medium Ash Gray/Jet 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:

    28 Combined MPG (26 City/30 Highway)

    Listing Information:

    VIN: 3GKALPEV3ML345352
    Stock: RSG818A
    Certified Pre-Owned: No
    Listed since: 06-20-2025

  • New Listing
    $21,998
    fair price
    $262 above market
    • 51,240 miles
    • 1 accident, 2 owners, corporate fleet vehicle
    • 5 Seats, 25 City / 28 Hwy MPG
    • CarMax Norcross (150 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Keyless Entry/Start
    Close

    Located in Norcross, GA / 150 miles away from Birmingham, AL

    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: No

    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: 3GKALVEV2ML345329
    Stock: 27462055
    Certified Pre-Owned: No

    • 28,513 miles
    • No accidents, 1 owner, personal use only
    • 5 Seats, 26 City / 30 Hwy MPG
    • Carvana - Atlanta (134 mi away)
    • Home delivery*
    • Back-up camera
    • Bluetooth
    • Keyless Entry/Start
    • Upgraded Headlights
    • Power Driver Seat
    Close

    Located in Atlanta, GA / 134 miles away from Birmingham, AL

    At Carvana, we go miles beyond the extra mile. That's why we provide you with a convenient, fast, and hassle-free car buying experience that puts you ...

    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:

    27 Combined MPG (26 City/30 Highway)

    Listing Information:

    VIN: 3GKALMEV1ML400136
    Stock: 2003682875
    Certified Pre-Owned: No
    Listed since: 05-01-2025

    • 62,415 miles
    • No accidents, 1 owner, personal use only
    • 5 Seats, 26 City / 30 Hwy MPG
    • CarMax Lithia Springs (124 mi away)
    • Back-up camera
    • Bluetooth
    • Keyless Entry/Start
    • Upgraded Headlights
    • Power Driver Seat
    Close

    Located in Lithia Springs, GA / 124 miles away from Birmingham, AL

    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: No

    Features and Specs:

    27 Combined MPG (26 City/30 Highway)

    Listing Information:

    VIN: 3GKALMEV3ML374574
    Stock: 26941122
    Certified Pre-Owned: No

  • New Listing
    • 87,575 miles
    • 1 accident, 3 owners, rental vehicle
    • 5 Seats, 25 City / 28 Hwy MPG
    • Serra Nissan of Sylacauga (37 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Keyless Entry/Start
    Close

    Located in Sylacauga, AL / 37 miles away from Birmingham, AL

    Alloy Wheels, Backup-Camera, Oil and filter changed, Recently Serviced, Apple Car Play, Blue Tooth Technology, Android Auto, AWD, Power Liftgate, Whee...

    AutoCheck Vehicle History Summary

    Accident Free Vehicle: No

    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: 3GKALVEV0ML316430
    Stock: PN2056
    Certified Pre-Owned: No
    Listed since: 06-27-2025

    • 91,129 miles
    • 1 accident, 2 owners, personal use only
    • 5 Seats, 26 City / 30 Hwy MPG
    • McDonough Hyundai (148 mi away)
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Keyless Entry/Start
    • Upgraded Headlights
    Close

    Located in McDonough, GA / 148 miles away from Birmingham, AL

    Recent Arrival! Visit the ALL-NEW MCDONOUGH HYUNDAI. No hidden fees, no gimmicks. Real Prices, Great value. ALL used vehicles are fully inspected and ...

    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:

    28 Combined MPG (26 City/30 Highway)

    Listing Information:

    VIN: 3GKALPEV0ML362948
    Stock: T362948
    Certified Pre-Owned: No
    Listed since: 06-13-2025

    • 44,044 miles
    • 1 accident, 2 owners, personal use only
    • 5 Seats, 26 City / 30 Hwy MPG
    • CarMax Southlake (142 mi away)
    • Back-up camera
    • Bluetooth
    • Keyless Entry/Start
    • Upgraded Headlights
    • Power Driver Seat
    Close

    Located in Stockbridge, GA / 142 miles away from Birmingham, AL

    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: 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:

    27 Combined MPG (26 City/30 Highway)

    Listing Information:

    VIN: 3GKALMEV6ML359115
    Stock: 27309387
    Certified Pre-Owned: No

  • New Listing
    • 65,844 miles
    • 1 accident, 1 owner, corporate fleet vehicle
    • 5 Seats, 26 City / 30 Hwy MPG
    • Marietta DriveTime (129 mi away)
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Keyless Entry/Start
    • Upgraded Headlights
    Close

    Located in Marietta, GA / 129 miles away from Birmingham, AL

    Shop at DriveTime: Get started on your personalized car-buying journey today. With no credit impact, you can get approved for your real, personalized ...

    AutoCheck Vehicle History Summary

    Accident Free Vehicle: No

    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:

    28 Combined MPG (26 City/30 Highway)

    Listing Information:

    VIN: 3GKALPEV6ML385229
    Stock: 1030304769
    Certified Pre-Owned: No
    Listed since: 06-24-2025

  • Price Drop
    $17,450
    great price
    $2,149 below market
    • 75,685 miles
    • No accidents, 1 owner, personal use only
    • 5 Seats, 25 City / 30 Hwy MPG
    • Jim Ellis Buick GMC (143 mi away)
    • Back-up camera
    • Bluetooth
    • Keyless Entry/Start
    • Upgraded Headlights
    • Tire Pressure Warnin...
    Close

    Located in Atlanta, GA / 143 miles away from Birmingham, AL

    Elevate your driving experience with this stunning 2022 GMC Terrain SLE. Boasting a sleek red exterior, this SUV combines style and functionality to d...

    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 (25 City/30 Highway)

    Listing Information:

    VIN: 3GKALMEV2NL203865
    Stock: TE44086A
    Certified Pre-Owned: No
    Listed since: 04-28-2025

    • 73,936 miles
    • 1 accident, personal use only
    • 5 Seats, 25 City / 28 Hwy MPG
    • Serra Honda of Sylacauga (37 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Keyless Entry/Start
    • Upgraded Headlights
    Close

    Located in Sylacauga, AL / 37 miles away from Birmingham, AL

    Boasts 28 Highway MPG and 25 City MPG! This GMC Terrain delivers a Turbocharged Gas 1.5L/92 engine powering this Automatic transmission.*Options:*Lice...

    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: 3GKALTEV8ML314073
    Stock: GH314073
    Certified Pre-Owned: No
    Listed since: 05-30-2025

  • $21,065
    great price
    $2,991 below market
    • 52,775 miles
    • No accidents, 3 owners, corporate fleet vehicle
    • 5 Seats, 25 City / 28 Hwy MPG
    • Beaman GMC (173 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    Close

    Located in Antioch, TN / 173 miles away from Birmingham, AL

    2022 GMC Terrain SLT 4SA Turbocharged Confidence in a Compact Luxury SUVThe 2022 Terrain SLT 4SA brings refined capability and modern tech into a slee...

    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: 3GKALVEV0NL127357
    Stock: ANL127357
    Certified Pre-Owned: No
    Listed since: 06-10-2025

  • Price Drop
    $26,489
    great price
    $2,044 below market
    • 31,885 miles
    • No accidents, personal use only
    • 5 Seats, 25 City / 28 Hwy MPG
    • Music City Autoplex (191 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Keyless Entry/Start
    Close

    Located in Nashville, TN / 191 miles away from Birmingham, AL

    CLEAN CARFAX NO ACCIDENTS REPORTED, ONE OWNER, REAR VIEW BACK-UP CAMERA, BLUETOOTH HANDS-FREE CALLING, AWD/ALL WHEEL DRIVE, NAVIGATION/GPS, HEATED LEA...

    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: 3GKALYEV3NL182645
    Stock: NL182645
    Certified Pre-Owned: No
    Listed since: 05-01-2025

  • $20,920
    great price
    $2,287 below market
    • 34,278 miles
    • 1 accident, 1 owner, personal use
    • 5 Seats, 25 City / 30 Hwy MPG
    • Alm Mall Of Georgia (162 mi away)
    • Back-up camera
    • Bluetooth
    • Keyless Entry/Start
    • Upgraded Headlights
    • Tire Pressure Warnin...
    Close

    Located in Buford, GA / 162 miles away from Birmingham, AL

    LICENSE PLATE FRONT MOUNTING PACKAGE - VK3..SLE PREFERRED EQUIPMENT GROUP - 3SA..DRIVER CONVENIENCE PACKAGE - ZQ2..INFOTAINMENT PACKAGE I - Y29..WHEEL...

    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:

    27 Combined MPG (25 City/30 Highway)

    Listing Information:

    VIN: 3GKALMEV1NL130228
    Stock: NL130228
    Certified Pre-Owned: No
    Listed since: 02-27-2025

  • Price Drop
    $22,998
    good price
    $1,120 below market
    • 18,504 miles
    • No accidents, 1 owner, personal use
    • 5 Seats, 25 City / 30 Hwy MPG
    • CarMax Warner Robins (189 mi away)
    • Back-up camera
    • Bluetooth
    • Keyless Entry/Start
    • Upgraded Headlights
    • Power Driver Seat
    Close

    Located in Warner Robins, GA / 189 miles away from Birmingham, AL

    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:

    27 Combined MPG (25 City/30 Highway)

    Listing Information:

    VIN: 3GKALMEV3NL146057
    Stock: 27159940
    Certified Pre-Owned: No

  • $23,998
    fair price
    $651 below market
    • 18,636 miles
    • No accidents, 1 owner, corporate fleet vehicle
    • 5 Seats, 25 City / 30 Hwy MPG
    • CarMax Columbus (125 mi away)
    • Back-up camera
    • Bluetooth
    • Keyless Entry/Start
    • Upgraded Headlights
    • Blind Spot Monitorin...
    Close

    Located in Columbus, GA / 125 miles away from Birmingham, AL

    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: 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:

    27 Combined MPG (25 City/30 Highway)

    Listing Information:

    VIN: 3GKALMEV4NL285016
    Stock: 27157074
    Certified Pre-Owned: No

Showing 1 - 21 out of 1,564 listings

Consumer Reviews for the GMC Terrain

Read recent reviews for the GMC Terrain
Overall Consumer Rating
4.1 out of 5 stars55 Reviews
Write a vehicle reviewSee all 55 reviews
  • 5 star
    (58%)
  • 4 star
    (18%)
  • 3 star
    (7%)
  • 2 star
    (9%)
  • 1 star
    (7%)
4 out of 5 stars

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.
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Used 2021 GMC Terrain in Birmingham, AL Values

Estimated values
2021 GMC Terrain SLT 4dr SUV (1.5L 4cyl Turbo 9A) with no options
ConditionTrade-InPrivate PartyDealer Retail
Outstanding$18,572$20,205$21,843
Clean$18,177$19,765$21,356
Average$17,518$19,031$20,544
Rough$16,661$18,077$19,489

The average list price of a used 2021 GMC Terrain in Birmingham, Alabama is $21,535. The average mileage on a used GMC Terrain 2021 for sale in Birmingham, Alabama is 51,209. Based on the average mileage of 51,209 for used 2021 GMC Terrain for sale in Birmingham, AL 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 Birmingham, Alabama to be $17,518.

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