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John Thornton Buick GMC

Carrollton, GA

4.6
435 Reviews
PROVIDING VEHICLES, SERVICE, AND PARTS TO CARROLL COUNTY, DOUGLAS COUNTY AND SURROUNDING AREAS TO CADILLAC, BUICK, AND GMC CUSTOMERS John Thornton Buick GMC is proud to be your Buick GMC Dealer for all of West Georgia by providing quality automotive services and unrivaled customer service. We're guaranteed to have the perfect vehicle to suit your lifestyle and budget requirements in our impressive selection of new Buick, GMC, or Cadillac vehicles and used vehicles. At John Thornton, our philosophy has always been to foster long-term relationships with our customers. When you're searching for new Buick, GMC, or Cadillac models, quality used vehicles, affordable loan and lease options, routine maintenance, auto repair, or genuine OEM auto parts, head to John Thornton Buick GMC in Carrollton!
Contact Dealership

1492 N Hwy 27

Carrollton, GA

30117

Directions

Top Reviewed Employees

Isaiah Jones at John Thornton Buick GMC

Isaiah Jones

Product Specialist
5.0
This rating includes all reviews, with more weight given to recent reviews.
Andrew Coker at John Thornton Buick GMC

Andrew Coker

Finance Manager
5.0
This rating includes all reviews, with more weight given to recent reviews.
Tanya Byers at John Thornton Buick GMC

Tanya Byers

Service Advisor
4.6
This rating includes all reviews, with more weight given to recent reviews.
Joanna Thigpen at John Thornton Buick GMC

Joanna Thigpen

Finance Manager
4.3
This rating includes all reviews, with more weight given to recent reviews.

Latest Reviews

September 23, 2025

We were first time customers and we’ll be back from sales financing excellent service More
by Michaelteague93

Employees Worked With

Joanna Thigpen
4.0
This rating includes all reviews, with more weight given to recent reviews.
RODNEY WALKER
5.0
This rating includes all reviews, with more weight given to recent reviews.
Dean Manston
4.0
This rating includes all reviews, with more weight given to recent reviews.

August 19, 2025

Do NOT buy a used car from this dealership. They knowingly sold me a 2019 GMC Yukon XL with serious issues—including a damaged transmission, faulty motor mounts, and malfunctioning TPMS sensors More
by GTSports1

Employees Worked With

Zach Robinson
1.0
This rating includes all reviews, with more weight given to recent reviews.
Jon Day
1.0
This rating includes all reviews, with more weight given to recent reviews.
Joanna Thigpen
1.0
This rating includes all reviews, with more weight given to recent reviews.
Glenn Pierce
1.0
This rating includes all reviews, with more weight given to recent reviews.

August 18, 2025

BUYER BEWARE! We purchased a used GMC Yukon XL from Jon Day on July 13th. The TPMS light came on the same night we purchased the vehicle. The transmission started More
by brooke.gunton

Employees Worked With

Jon Day
1.0
This rating includes all reviews, with more weight given to recent reviews.

Dealership Inventory (313 Vehicles)

used 2017 Ram 1500 car, priced at $12,454
2017 Ram 1500
used
Bright Silver Clearcoat Metallic exterior
Automatic
Rear-wheel Drive
used 2021 GMC Yukon car, priced at $47,223
2021 GMC Yukon
used
Satin Steel Metallic exterior
Automatic
Four-wheel Drive
used 2024 GMC Sierra 1500 car, priced at $58,894
2024 GMC Sierra 1500
used
Sterling exterior
Automatic
Four-wheel Drive
used 2023 GMC Sierra 1500 car, priced at $44,254
2023 GMC Sierra 1500
used
Onyx Black exterior
Automatic
Four-wheel Drive
used 2020 GMC Terrain car, priced at $14,383
2020 GMC Terrain
used
Summit White exterior
Automatic
Front-wheel Drive
used 2023 Land Rover Range Rover Sport car, priced at $79,993
2023 Land Rover Range Rover Sport
used
Firenze Red exterior
Automatic
Four-wheel Drive

Photos & Amenities

  • After Hours Drop-Off
  • Authorized Accessories Store
  • Authorized Parts Store
  • Cable TV
  • Children's Play Room
  • Customer Lounge Area
  • Free Coffee
  • Free Drinks
  • Free WiFi
  • Home Delivery
  • No Contact Transactions
  • Pet Friendly
  • Quick Lube
  • Service Pickup and Delivery
  • Shuttle Service
  • Television
  • Vending Machines
  • Virtual Appointments