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1,829 listings
    • 127,150 miles
    • 1 accident, 1 owner, personal use only
    • 5 Seats, 26 City / 30 Hwy MPG
    • Euro Car Tech (455 mi away)
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Keyless Entry/Start
    • Upgraded Headlights
    Close

    Located in Arlington, TX / 455 miles away from McAllen, TX

    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: 3GKALPEVXML315118
    Stock: 315118
    Certified Pre-Owned: No

  • Price Drop
    • 31,511 miles
    • 1 accident, 1 owner, personal use only
    • 5 Seats, 26 City / 30 Hwy MPG
    • CarMax (In-stock online)
    • Transfer available from LA to TX*
    • Back-up camera
    • Bluetooth
    • Keyless Entry/Start
    • Upgraded Headlights
    • Blind Spot Monitorin...
    Close

    Located in Baton Rouge, LA / 523 miles away from McAllen, TX

    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: 3GKALMEV6ML392325
    Stock: 26897042
    Certified Pre-Owned: No

    • 44,044 miles
    • 1 accident, 2 owners, personal use only
    • 5 Seats, 26 City / 30 Hwy MPG
    • CarMax (In-stock online)
    • Transfer available from GA to TX*
    • Back-up camera
    • Bluetooth
    • Keyless Entry/Start
    • Upgraded Headlights
    • Power Driver Seat
    Close

    Located in Stockbridge, GA / 976 miles away from McAllen, TX

    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

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  • $21,523
    great price
    • 32,444 miles
    • No accidents, 1 owner, rental vehicle
    • 5 Seats, 24 City / 29 Hwy MPG
    • Hertz Car Sales Bedford (464 mi away)
    • Back-up camera
    • Bluetooth
    • Keyless Entry/Start
    • Upgraded Headlights
    • Tire Pressure Warnin...
    Close

    Located in Bedford, TX / 464 miles away from McAllen, TX

    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 (24 City/29 Highway)

    Listing Information:

    VIN: 3GKALMEG6RL329010
    Stock: 58325
    Certified Pre-Owned: No
    Listed since: 04-04-2025

    • 56,943 miles
    • 1 accident, 1 owner, personal use only
    • 5 Seats, 26 City / 30 Hwy MPG
    • Service Chevrolet (467 mi away)
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    • Keyless Entry/Start
    Close

    Located in Lafayette, LA / 467 miles away from McAllen, TX

    CARFAX One-Owner. **ONE OWNER**. 25/30 City/Highway MPGBuy With Confidence! At Service Chevrolet Cadillac's Pre Owned and Certified Pre Owned Center, ...

    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: 3GKALSEV4ML398029
    Stock: T250784A
    Certified Pre-Owned: No
    Listed since: 03-23-2025

    • 34,934 miles
    • No accidents, 2 owners, personal use only
    • 5 Seats, 22 City / 28 Hwy MPG
    • Patriot GMC Buick (339 mi away)
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Killeen, TX / 339 miles away from McAllen, TX

    ***CERTIFIED***, Terrain Denali, 2.0L Turbocharged, White Frost Tricoat, Jet Black Leather, 2 USB Data Ports w/SD Card Reader, Adaptive Cruise Control...

    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:

    24 Combined MPG (22 City/28 Highway)

    Listing Information:

    VIN: 3GKALSEX3LL146739
    Stock: 05394A
    Certified Pre-Owned: Yes
    Listed since: 03-25-2025

  • New Listing
    • Not provided
    • 5 Seats, 24 City / 28 Hwy MPG
    • Salvage Reseller West (457 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Keyless Entry/Start
    • Upgraded Headlights
    Close

    Located in Grand Prairie, TX / 457 miles away from McAllen, TX

    This vehicle is located at Graham, WA Copart yard. All purchases must take place online at www.salvagereseller.com. Visit our website to learn more.

    AutoCheck Vehicle History Summary Unavailable.

    Features and Specs:

    26 Combined MPG (24 City/28 Highway)

    Listing Information:

    VIN: 3GKALTEV7KL119661
    Stock: 57114415
    Certified Pre-Owned: No
    Listed since: 05-16-2025

  • New Listing
    • 45,298 miles
    • 5 Seats, 26 City / 30 Hwy MPG
    • CarMax (In-stock online)
    • Transfer available from MO to TX*
    • Back-up camera
    • Bluetooth
    • Keyless Entry/Start
    • Upgraded Headlights
    • Power Driver Seat
    Close

    Located in Saint Peters, MO / 976 miles away from McAllen, TX

    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:

    27 Combined MPG (26 City/30 Highway)

    Listing Information:

    VIN: 3GKALMEV8ML340288
    Stock: 26895450
    Certified Pre-Owned: No

  • New Listing
    • 37,281 miles
    • 5 Seats, 25 City / 28 Hwy MPG
    • CarMax (In-stock online)
    • Transfer available from GA to TX*
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    Close

    Located in Augusta, GA / 1,088 miles away from McAllen, TX

    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:

    26 Combined MPG (25 City/28 Highway)

    Listing Information:

    VIN: 3GKALVEV6ML331658
    Stock: 27258365
    Certified Pre-Owned: No

  • $18,887
    great price
    • 80,902 miles
    • No accidents, 1 owner, personal use
    • 5 Seats, 25 City / 28 Hwy MPG
    • Sewell Buick GMC (467 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Dallas, TX / 467 miles away from McAllen, TX

    Sewell Buick GMC of Dallas proudly offers this 2022 GMC Terrain All Wheel Drive that has been professionally inspected by one of our Sewell technician...

    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: 3GKALYEV3NL192463
    Stock: 5306892A
    Certified Pre-Owned: No
    Listed since: 03-17-2025

  • New Listing
    Stock photo**
    • 71,664 miles
    • No accidents, 1 owner, personal use only
    • 5 Seats, 26 City / 30 Hwy MPG
    • North Park Volkswagen (239 mi away)
    • Back-up camera
    • Bluetooth
    • Keyless Entry/Start
    • Upgraded Headlights
    • Tire Pressure Warnin...
    Close

    Located in San Antonio, TX / 239 miles away from McAllen, TX

    Clean CARFAX.25/30 City/Highway MPGWe're proud of our Posted Pricing policy, which means that no matter which vehicle you choose at our dealership, yo...

    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: 3GKALMEV2ML327939
    Stock: UL327939
    Certified Pre-Owned: No
    Listed since: 05-14-2025

  • New Listing
    • 41,444 miles
    • Frame damage reported, 1 owner, rental vehicle
    • 5 Seats, 24 City / 28 Hwy MPG
    • Auto Boutique Texas (290 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Keyless Entry/Start
    Close

    Located in Alvin, TX / 290 miles away from McAllen, TX

    Auto Boutique is proud to offer excellent, pre-owned vehicles. With our no haggle pricing policy you can be sure you are getting the best deal possibl...

    AutoCheck Vehicle History Summary

    Accident Free Vehicle: Yes

    Personal Use Only: No

    History Provider: AutoCheck

    Title Details: Issue reported

    Salvage Vehicle: No

    Frame Damage: Yes

    Theft History: No

    Lemon Status: No

    Free History Report: No

    Features and Specs:

    26 Combined MPG (24 City/28 Highway)

    Listing Information:

    VIN: 3GKALVEG2PL143905
    Stock: T24946
    Certified Pre-Owned: No
    Listed since: 05-14-2025

  • $24,151
    great price
    • 30,771 miles
    • No accidents, 1 owner, personal use
    • 5 Seats, 23 City / 28 Hwy MPG
    • RubyCar - Dallas (462 mi away)
    • Home delivery*
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Keyless Entry/Start
    Close

    Located in Euless, TX / 462 miles away from McAllen, TX

    Apple/Google Car Play, Backup Camera, Bluetooth, Buy with Confidence! AVIS CERTIFIED 170 Point Inspection!, Extra Clean!, Fully Detailed, LOW NO HAGGL...

    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:

    25 Combined MPG (23 City/28 Highway)

    Listing Information:

    VIN: 3GKALVEG3RL250531
    Stock: 54681944
    Certified Pre-Owned: No
    Listed since: 09-30-2024

  • New Listing
    Stock photo**
    • 118,608 miles
    • 5 Seats, 26 City / 30 Hwy MPG
    • Blake Fulenwider Ford of Andrews (498 mi away)
    • Back-up camera
    • Bluetooth
    • Keyless Entry/Start
    • Upgraded Headlights
    • Tire Pressure Warnin...
    Close

    Located in Andrews, TX / 498 miles away from McAllen, TX

    Terrain SLE, 1.5L DOHC, Summit White, Jet Black Cloth, Black GMC Center Caps w/Black GMC Lettering, Black Mirror Caps, Darkened Front Grille, Elevatio...

    AutoCheck Vehicle History Summary Unavailable.

    Features and Specs:

    27 Combined MPG (26 City/30 Highway)

    Listing Information:

    VIN: 3GKALMEV6ML395872
    Stock: PSAS019AK
    Certified Pre-Owned: No
    Listed since: 05-15-2025

  • $21,199
    great price
    • 64,418 miles
    • No accidents, 1 owner, rental vehicle
    • 5 Seats, 25 City / 28 Hwy MPG
    • Nissan of McKinney (490 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Keyless Entry/Start
    Close

    Located in Mckinney, TX / 490 miles away from McAllen, TX

    Clean CARFAX.Summit White 2022 GMC Terrain SLT 25/28 City/Highway MPG++Apple CarPlay and/or Android Auto++, **LEATHER**, Back-Up Camera, HomeLink, Blu...

    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: 3GKALVEV9NL183734
    Stock: NL183734
    Certified Pre-Owned: No
    Listed since: 05-07-2025

  • $22,626
    great price
    • 27,588 miles
    • No accidents, 1 owner, personal use
    • 5 Seats, 25 City / 30 Hwy MPG
    • Luke Fruia Buick GMC (49 mi away)
    • Back-up camera
    • Bluetooth
    • Keyless Entry/Start
    • Upgraded Headlights
    • Tire Pressure Warnin...
    Close

    Located in Brownsville, TX / 49 miles away from McAllen, TX

    CARFAX One-Owner. Clean CARFAX. Ebony Twilight Metallic 2022 GMC Terrain SLE FWD 9-Speed Automatic 1.5L DOHCRecent Arrival! Odometer is 15399 miles be...

    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: 3GKALMEV1NL132075
    Stock: PB25486C
    Certified Pre-Owned: No
    Listed since: 04-29-2025

  • New Listing
    Stock photo**
    • 67,826 miles
    • 1 accident, 1 owner, personal use only
    • 5 Seats, 26 City / 30 Hwy MPG
    • Trophy Nissan (468 mi away)
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Keyless Entry/Start
    • Upgraded Headlights
    Close

    Located in Mesquite, TX / 468 miles away from McAllen, TX

    2021 GMC Terrain SLT 2 USB Data Ports w/SD Card Reader, 6 Speakers, Adaptive Cruise Control, Auto High-beam Headlights, Auto-dimming door mirrors, Bla...

    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: 3GKALPEV7ML320311
    Stock: PML320311
    Certified Pre-Owned: No
    Listed since: 04-13-2025

    • 6,701 miles
    • No accidents, 1 owner, personal use only
    • 5 Seats, 24 City / 29 Hwy MPG
    • DeMontrond Buick GMC (315 mi away)
    • Back-up camera
    • Bluetooth
    • Keyless Entry/Start
    • Upgraded Headlights
    • Blind Spot Monitorin...
    Close

    Located in Houston, TX / 315 miles away from McAllen, TX

    At DeMontrond Buick GMC, we’re committed to delivering a trusted, family-owned dealership experience in Houston. Since 1953, our mission has been to p...

    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 (24 City/29 Highway)

    Listing Information:

    VIN: 3GKALMEG0RL383161
    Stock: TRL383161
    Certified Pre-Owned: Yes
    Listed since: 04-18-2025

  • $22,290
    great price
    • 25,234 miles
    • No accidents, 1 owner, personal use only
    • 5 Seats, 25 City / 28 Hwy MPG
    • Prosper Ford (492 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Keyless Entry/Start
    • Upgraded Headlights
    Close

    Located in Prosper, TX / 492 miles away from McAllen, TX

    FRESH ARRIVAL! CARFAX ONE-OWNER!2022 GMC Terrain SLE AWD Smart, Stylish, and Versatile!Perfect for those seeking rugged performance, cutting-edge tech...

    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: 3GKALTEV7NL287255
    Stock: NL287255
    Certified Pre-Owned: No
    Listed since: 04-19-2025

    • 86,564 miles
    • 1 accident, 1 owner, personal use only
    • 5 Seats, 24 City / 28 Hwy MPG
    • Salvage Reseller West (457 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Keyless Entry/Start
    • Upgraded Headlights
    Close

    Located in Grand Prairie, TX / 457 miles away from McAllen, TX

    This vehicle is located at Rapid City, SD Copart yard. Join our online auctions to see its final price. All purchases must take place online at www.sa...

    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 (24 City/28 Highway)

    Listing Information:

    VIN: 3GKALTEV3KL325205
    Stock: 78602104
    Certified Pre-Owned: No

  • New Listing
    • 85,898 miles
    • 5 Seats, 26 City / 30 Hwy MPG
    • Lawrence Hall Chevrolet Buick GMC (441 mi away)
    • Back-up camera
    • Bluetooth
    • Keyless Entry/Start
    • Upgraded Headlights
    • Power Driver Seat
    Close

    Located in Abilene, TX / 441 miles away from McAllen, TX

    2021 GMC Terrain SLE 2 USB Data Ports w/Auxiliary Input Jack, 3.47 Axle Ratio, 4-Way Manual Driver's Seat, 4-Way Manual Front Passenger Seat, 4-Wheel ...

    AutoCheck Vehicle History Summary Unavailable.

    Features and Specs:

    27 Combined MPG (26 City/30 Highway)

    Listing Information:

    VIN: 3GKALMEV9ML342437
    Stock: 1P9694B
    Certified Pre-Owned: No
    Listed since: 05-15-2025

Showing 232 - 252 out of 1,829 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 McAllen, TX Values

Estimated values
2021 GMC Terrain SLT 4dr SUV (1.5L 4cyl Turbo 9A) with no options
ConditionTrade-InPrivate PartyDealer Retail
Outstanding$17,495$19,515$21,542
Clean$17,123$19,090$21,062
Average$16,502$18,381$20,261
Rough$15,695$17,460$19,221

The average list price of a used 2021 GMC Terrain in McAllen, Texas is $21,431. The average mileage on a used GMC Terrain 2021 for sale in McAllen, Texas is 53,201. Based on the average mileage of 53,201 for used 2021 GMC Terrain for sale in McAllen, TX 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 McAllen, Texas to be $16,502.

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