New and used 2026 GMC Sierra 1500 Denali trucks for sale near Jericho, NY

Very good I had a wonderful experience there. They did great work on my car. I will bring back more of my cars to get service there.also

Stanley is amazing always keeping me updated and make sure my truck is always returned in better condition than it was. They are a great dealer

Staff was very helpful and informative , I was able to locate the car I wanted, tell the sales person , and he was able to get me approved and drive out the same day

Rob Birchall and the team were great. Was towed in on a Saturday and they were able to diagnose the problem and have me back on the road in 90 minutes.

I went in on a rainy, gray day with no plan. Stood under my umbrella looking at a white Buick and suddenly realized I wanted it. They didn’t rush me—just handed me the keys: “Go drive. Then we’ll talk.” A week later, I’m still smiling.

if you go to this place ask for Oz... an absolute gentleman, and great salesrep ... very rare you find a man like that in the industry... overall 10/10 experience... never even asked me to write a review but my experience was too smooth not too

We bought a car for my grandmother. I just watched. They spoke softly with her, never rushed, explained clearly, and didn’t talk down to her. That respect meant a lot.

Bought a Sierra for business. Needed hauling capacity and durability. They helped me spec it right, and the price was fair—I checked around.

I had a great experience at Generation Buick GMC with Joe Rossetti. He met all my needs, I will be recommending all of my friends.

I recently purchased a used vehicle from Petar Ardeljan and it was a pleasure. This dealership operates differently from most as they encompass a no pressure environment and are transparent throughout the process. I would definitely recommend.

Stanley in the service department was great, as is everyone at RVC GMC! Had the oil changed while I waited, and it was done promptly as promised.

Only thing I have to say is I wish I had purchased my Sierra truck from this dealership. I drove pass my purchase dealership just to do business with Rockville Center GMC Andy Melo and crew did a splendid job on getting me in and out and safely on my way.

My vehicle was being serviced at service center.Staff was very polite.

Very helpful service from Petar and extreme transparency very truthful and genuine 👏 looking forward to purchasing from this dealership

Recently I wrote a complaint review regarding an issue I was having with Milea regarding collision body works repairs. The repair issues have been resolved. Milea Service Manager Angelo contacted me, service was performed on my vehicle, dents were repaired. Problem was corrected satisfactory. Milea made good.

Great service from Zach. Very knowledgeable and thorough. Will definitely recommend him and Generation Buick GMC to my friends and family.

Wow what a complete difference in professional service from Generation GMC in Sayville compared from King O'Rourke in Smithtown. Service department is amazing. They send you a video from the mechanic going over all the concerns that you have any what they found. I was constantly being told my oul leak was a seel. Thanks to Generation GMC they took the time to find the real cause and it's going to take a week to fix. Thank God had the issues at King O'Rourke otherwise I wouldn't have found an amazing dealership. Especially Thanks to Maria for keeping me updated.