Used GMC Sierra 2500 Denali for sale near Lithia Springs, GA

The service department was awesome. Lamarcus Tenny checked to make the service visit was top notch. I plan on bringing my car back in the future!

One very awesome vehicle. Checks all the boxes you need in a truck and exceeds expectations on quality, performance, and looks great ,too. Love my nre truck.

Very pleased with service I received. It honest, helpful and answered my question and concerns. Greg was able to satisfy what I needed and I would recommend purchasing a car from this dealership.

I've owned every other American truck and this is my first GMC. I bought the 2500 HD Texas Edition. I absolutely love this truck. It's everything I could have hoped for and more. It is able to pull my 30' travel trailer with no problems. So now when we go out with our trailer I'll have no worries. The look and feel of the truck is outstanding. The 6.6L gas engine actually gets great gas mileage. It gets about the same as my Ford f150 ecoboost. Probably better on the highway. Looking at about 13 miles in the city and 15 plus on the highway. Definitely got a better truck for the price compared to any other american models with the same characteristic and options.

I have purchased a number of vehicles from John Thornton Chevrolet and one from John Thornton Cadillac/GMC and have had great experiences in every case. They are the only dealership I use for service for my Georgia based cars.

So far so good! This truck is the nicest truck I have ever driven. The stance, ride comfort and options are top notch. I went from a 2023 High Country that was having drive train issues but had all the creature comforts that you would expect in a top of the line truck. With the lack of confidence in that particular models 10 speed transmission issues, it became necessary to reestablish my confidence in my General Motors product.

I had amazing Fast Pace experience even though it took me 3 days to get my car due to My inability to provide the documents they needed.however going on the lot getting pre-approved over the phone walking in and walking out with my vehicle was the easiest process I've ever faced. John was very helpful and Adrian was the greatest he worked with me every step of the way and he made sure I drove off the lot with the car i wanted. Even more so when I didn't even think or believe they can get me financed and not to mention they put a bow on the car I felt very special and the customer service made me feel very confident I am so grateful for you guys thank you so much CarMax!!!!!!!!!

I've owned my truck for nine years now it is never once let me down. I'm about to put my first set a tires on it and brakes other than that I don't plan on getting rid of it it's never let me down and after reading all the other reviews it makes me realize they don't make them like they used to as they used too!

Very good customer service. I wanted to thank Brittany Carter for the prompt response, and for the first-class attention they gave me, providing all the useful information I requested

This truck is the truck that all others should look up to. It rides great, will tow a house, runs smooth, and gets great fuel economy. The Allison transmission is so smooth. The AT4 looks great too.

Friendly staff. Great inventory . They worked with me to get a great deal. The process moved very quickly and efficiently. My sales representative is the best I have ever dealt with.

I paid over $106,000 for this truck with warranty. Do not care much about miles per gal. at that that price range. Just too much truck for me at my age.

Very helpful, eager to help me find a car for my needs . Prompt and knowledgeable

Amazing service and prices. Carlos was a huge help with the process. Will definitely be back in the future.

Ollie was amazing he took care of my needs and help me to buy my dream car for my family. I will continue to do business with him and bring business to there company 5 stars all around great job .

Love everything about this Duramax Denali except the fuel mileage. 13-14 Mpg tops when not towing. Bought truck cause previous was stolen. Wish I still had my 6.2 High Country!

My experience was excellent with Ted. The videos from the technician ere very informative. My son-in-law had a previous car worked on here and also purchased a new one from Ellis GMC.

I worked with Brett and Daniel. They both were extremely helpful and informative. Although I did not end up purchasing a vehicle here, they were professional and genuinely wanted to help me find what was best for me. Highly recommend this dealership.

I came from Columbia SC to look at a Jeep Sahara I saw online. Greg greeted us at the door and got us into a test drive and then purchasing the vehicle without any issues. He was friendly, efficient, and made my car buying experience a breeze. I would recommend ALM Marietta to friends and family, and ask for Greg!!!

I love my 2021 GMC Denali 2500HD. I have gotten more complements on this truck than any other vehicle that I have owned. I get great highway fuel milage average 19-26mpg,which is great for a heavy duty truck!

Great experience with Hennessy of Southlake. Frank Parker was awesome and represented the dealership well. I flew in from Memphis, was picked up from the airport and everything about the car was as represented online.

Always very good service. Take very good care of my vehicle

I have now worked with Bryan, Tim Burton, and Drew and they have all been amazing!!!! They were very knowledgeable and helped my find the vehicles that i wanted and made the buying process an easy and smooth process. If you need a "new to you" car go see any of the three of them and they will help you out!!!!

Excellent choices to choose from and very easy to buy and sell your next car … and and the site has great options at the tip of your fingers thank you cars.com for a great experience…

This is the second time that I’ve taken my car to Hennessy and they did another great job! I’d like to shout out Tye, Chelo, Bob, Devon Lee, and Joseph wonderful teamwork!!! 💯💯🙋🏽‍♀️

I purchased a 2025 Chevy Equinox a few weeks ago. The process from the beginning to the end was fun. Yep, I said fun. I felt no pressure. Kam understood what I wanted and showed me two vehicles. I was given VIP treatment! Kam even answered my wacky questions. Every step was explained prior to seeing William. Sitting in William's office was fun too. I was a little nervous but he made the process fun too! My husband was happy too!

Very nice and knowledgeable one of the best experience I’ve ever had at a dealership, hands-down