Used Cadillac CT6 for sale near Middleton, WI

Aaron, our salesman and Kim the online consultant were great. Jeff was a bit indifferent and unwilling to barter too much. Otherwise, I was happy with the overall experience.

No repairs required runs great beautiful design brakes are squeaking seems to be stalling when going basic speed. Love the interior exterior design comfortable ride

I’m happy today to learn technology and all features, which Tucson 2025 offers, with Brand Ambassador Jenny Bethell. She is professional, kind and very patient with senior driver. Now I feel confident ,up to date with technology and safety. Thank you very much!

runs good never gave me any problems and still have it until this day wasnt a bad purchase i recommend this car for anybody who likes them

We went in there with no hope of getting a new vehicle but they made it happened even with everthing against us very very happy and would definitely buy again from there

I purchased vehicle use. I had car for four months,so far iam satisfied with it ,previously own ct6.i was concern about transmission problems. Think previous owner had cadillac, to fix problem. Car has plenty,power.

Love the style, ride and the ease to learn the technology. Very happy with getting premium performance using regular gas. Plenty of room for all 5 passengers.

The entire process was smooth, efficient and extremely pleasant. No pressure and no surprises and the entire team was very friendly and helpful. An excellent experience in every way.

I purchased the CT6 Luxury AWD new in 2017. I haven't had any issues at all. I love the double sunroof and the 360 camera view. But what I am really upset about is GM discontinued this model. It is an awesome driving car and I won't be getting rid of it anytime soon.

Jose in the service department is very efficient and effective. He clearly makes the customer feel heard and not pressed. He made a quick service appointment and was able to assist with transportation as well. Good Job J!

I have a ct6 platinum with super cruise. 4 years now bought used . I have driven it 60k miles. Not a single problem. Normally gets 30mpg with the 3.6v6 on highway about 24 in town. The car handles fantastic on any surface. I love it. Highly recommend it.

Andre was great to work with. Was very responsive and always followed through with answering any questions.

Recently bought a used CT6 w/2.0 Turbo (2018 with 39K miles). Have put only about 500 miles on it so far, but, WOW!!! This car is amazing! This car lives up to it's reputation as a builder of premium American luxury vehicles. My las t Cadillac was a 2000 STS...which was mediocre by comparison. It is soooo beautiful inside. I like that the screen is integrated into the dashboard. It's size takes a bit of getting used to, as my last car was a Mercedes E250. I test drove the 2.0 turbo and the 3.0, and found the 2.0 Turbo to be equally responsive but smoother. Exterior styling is simple clean and exudes luxury. I get so many compliments, heads turns and such. I love the Apple Car Play feature that projects what's on my phone to the in-dash screen. Recently did a road trip and got an AVERAGE of 33.4 MPG on the highway. I am getting 25 MPG+ around town. To me, that's pretty impressive for a car his size. In keeping with Cadillac's reputation, this car drives so smooth and quiet. Last time I drove a car this quiet and smooth as a Lexus LS460. At $30K less than the price of an average EV, it will take a lot of gas to make up the cost difference of those overpriced cars.

First time at Cochran Monroeville GMC a very pleasant experience from beginning to the final deal. Salesman Darius was very easy to deal with making sure my buying experience was stress free. During the final numbers of the deal he explained everything and made sure I was pleased. Lucas Anderson in Finance was very proffessional and efficient. Near the end of my experience Sales Manager Dale Taylor checked with me making sure I was totally satisfied with my deal.

I'm trading my 2019 CT6 after two years. Have really enjoyed this car. There is no better highway cruising car ever, it's incredibly smooth but tightly built, not sloppy ever. Great gas mileage, very peppy, and beautiful. The electronics are very easy to understand. The only complaint- driver's seat too short, I'm 5'11", long legs, and I had a buy a bolster cushion. Otherwise, I've loved it. Trading up to a BMW 8 series for more excitement.

I purchased a 2025 Ct4 Luxury from Delaware Cadillac in July 2025. I noticed some inconsistencies in the paint on the passenger rear quarter panel and the rear parking sensors were working intermittently. I contacted Tony in the service department, and she checked the problems I had. She scheduled an appointment with the paint service and had the parking sensors checked. The day I came in for the scheduled service, Mike checked my Ct4 again to make sure he saw the problems too be corrected. I was given a Ct4 to drive while the work was being done on my vehicle, this was helpful because its the same car and I did not have to figure anything out. Mike called and told me that the paint was worked on but he did not think it was any better than I had done with the touch up and the parking sensors were checked and seemed to be as they were supposed to be. When I arrived to pick up my vehicle, I was very happy with the paint work and the vehicle was clean as I left it. It is important to me that some one knows that I am very satisfied with the way this issue was handled . I want give kudos to Dane Tjaden for sales, Mike Anderson and Toni Spille for service. Thank you, I have never been treated this well by a car dealer. ( Cadillacs are more than a car!) T. A. Olin To Whom It May Concern, I purchased a 2025 CT4 Luxury from Delaware Cadillac in July 2025. Shortly after, I noticed some inconsistencies in the paint on the passenger rear quarter panel and found that the rear parking sensors were working intermittently. I reached out to Toni Spille in the service department, who promptly scheduled an appointment to address both concerns. When I arrived for the service, Mike Anderson inspected my CT4 again to confirm the issues and ensure everything would be addressed properly. I was provided with a loaner CT4, which I greatly appreciated—it made the transition seamless since it was the same model I’m familiar with. Mike later contacted me to provide an update. He informed me that while the paint had been retouched, he personally didn’t feel it was much of an improvement over my own previous touch-up. He also noted that the parking sensors were tested and found to be operating as expected. However, when I picked up my vehicle, I was genuinely pleased with the paint work—it looked much better than I anticipated. The vehicle was also returned to me clean and in great condition, exactly as I had left it. I want to express my sincere gratitude for the excellent customer service I received. It’s important to me that someone knows how satisfied I am with how this situation was handled. I’d like to especially recognize Dane Tjaden in sales, and both Mike Anderson and Toni Spille in service. Their professionalism, transparency, and care made all the difference. Thank you again. I have never been treated this well by a car dealer—and I firmly believe that Cadillacs are more than just a car! Sincerely, T. A. Olin

It is easy to navigate , good for gas, quiet but still shows the work of the engine. Warms up quickly and has luxurious look.

If buying a car always went like this, people wouldn’t dread it. The team was on top of everything and the process was effortless. Cara Z was fantastic—no salesy nonsense, just honest knowledge and great energy. Picked up a 2025 Honda Ridgeline that looked exactly as advertised. 10/10 would shop here again. Erika was great too!!!

Just a great car beautiful to look at and very enjoyable to drive short trips and curvy road or long road trips it takes the boredom out of riding or driving and make them something to look forward to

This is our second purchase from Eric Corley he’s a true professional I highly recommend you ask for him he represents Mercedes Benz of Gainesville very well if I could give six stars I would!! A very satisfied customer!

Having had my 2018 Cadillac CT6, equipped in the optional Premium-Luxury trim level, for nearly 3 years, I can honestly boast of its many attributes. It offers wonderful styling inside & out, the availability of virtually every current "high-tech" option conceivable, and has proven to be consistently reliable – and, while some may describe it as a bit “pricey,” it’s actually a relative bargain, when compared to its European competitors. The CT6 harkens back to the classic Cadillac sedans of years gone by, as its size, comfort, and luxury amenities remind owners and admirer’s alike, of many of those all-American classics. Although it's a pleasure to drive, even when equipped with the new and improved, 3.6L V6, the optional 3.0L Twin Turbo engine is recommended for those drivers who like a “little something extra” when depressing the accelerator pedal. With regard to performance, it is somewhat regrettable that an (optional) V8 is unavailable in the company’s “Flagship model.” This absence, I suspect, is a rather obvious "nod” to the so-called green energy movement that seems to have “infected” the entire auto industry, of late. In summary, if you’re looking for a full-sized American luxury car – look no further. The Cadillac CT6 “fits that bill, to a tee.”

Susan and Roy were fantastic today helping me with my phone connection and the fob battery. Also answered some of my other questions. Can’t say enough good things about them. They were Great!!

My vehicle is an excellent car to drive. The CT6 is a great handling, smooth, comfortable driving vehicle. This is my third Cadillac that I am driving and plan on continuing to drive one.

Dealt with Cole Sizemore great experience super nice great deal love dealing with Cole and Kerry Toyota

I’m really enjoying the smooth ride and luxury features. The panoramic sunroof view is amazing and the comfort of the sedans leather interior is unparalleled.

If you work with the father/daughter duo, Tre Buttram and/or Nakaylah Menedez, you will leave feeling like you can trust the entire process of buying cars again. You will also leave feeling heard and satisfied! 🥇🚙

This automobile is a vehicle of dreams Power roomy front and back Movies Massaging seats heated and cooling seats. Dual sunroof s. Shades. I feel special just Driving or Riding

Best experience I’ve ever had, Nelson was awesome, super knowledgeable and a very honest kind person got to meet Paul the Gm and he was also extremely helpful and nice. Thank you

Plenty of room. I used the controls on the steering wheel. Never on console, sometimes on screen. Seldom take eyes off road. Had twenty months left on my XTS bumper to bumper . Next car was going to be CT6. I don't know what Cadillac is doing with sedans. There were no CT6 in Tampa had to go to West Palm but the CT4 and 5 were too small. The screen on the CT5 looked like it was slapped on top of dash and sun roof left something to be desired. Cadillac and sedan?????. looks like Electric in the future ?????

Purchased new 2500 HD Denali, salesman Mike Sparks was very professional with no playing games. The finance process with Willie Hill was quick and painless. Would definitely recommend Group 1 GMC to anyone looking to buy a new vehicle

Bryce took care of me in no time at all, great car and price! Thank you!!! Will recommend to everyone!

This is a beautiful car, I love everything about it. Color inside and out, style, and performance. This is my third CT6, and I say you can’t go wrong when buy one!!!

Lawrence is such a great guy helped us out so much with our new car. Walked us threw it step by step

I love everything about the CT6. I have a 2019 Sport twin turbo model and it’s a dream to drive. Fast and responsive when I want that. Smooth and comfortable when I want that, too. I bought it because of the self driving system Super Cruise, which is the best self driving technology available — better and safer than Tesla. I also love the exterior styling and the interior design. The Cue system is great. The legroom in the back is the best I’ve ever had. Seriously, this is an amazing car. It baffles me why Cadillac stopped making it. They didn’t market it well. If more people knew about Super Cruise, that alone would have sold a lot more cars. GM screwed up big time when they canceled this car. They should have tried to actually sell more by investing in marketing it. NO ONE knows about Super Cruise. Add on the performance and styling and it’s the best car I’ve ever owned.

Found the car with the mileage we'd been looking for. Drove from Tallahassee, FL. to Ocala, FL. and Sullivan's to trade our existing car in on the 2019 Mercedes. In and out in just over 2hours. Gotta be a record for buying a car. Sullivan's was very efficient and professional. Highly recommend them for your next vehicle.

Today, I purchased a Nissan Ariya at Auto Boutique. My salesperson was Lou Walker. Lou was great. He was knowledgeable, patient, professional and courteous. Unlike most used car salesmen, Lou was not pushy. He gave me the information that I needed to evaluate the cars of interest to me and the time to process the information. This was my first purchase at Auto Boutique and Lou made it very pleasant and stress-free. If you need a car, Lou is your guy!

I purchased the car new and have had it for 6 years, it has been nothing but awesome in many ways. The styling has endless elegance and will always be a good looking car. Being at "this time" possibly the last of the BIG BODY Cadillacs it will remain special in many ways. It is a great driving car with the combination of AWD ultimately makes it a year round car for my location.