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John Duncsak
94 Reviews
I refer to myself as Big John. I went to Cal State Fullerton and started in the automotive industry in 1987. I began working at Jim Curley GMC IN 2022. I truly love the car business and consider my co-workers my friends. They are the heart of the dealership. I am originally from Linden, N.J. and have lived in Toms Rivers since 1997 .I lived in California for 6 1/2 years, and my first real job was at Disneyland. That is where I learned that customers always come first. I've been married to my wife Barbara since 1992 and have twins Nick and Kaitlyn. Both college grads and both graduated got their masters in education and business analytics. . I'm proud to say that my wife and my kids are everything to me . My success is their success . It feels great to be with the Curley family . Now 2 great locations! Jim Curley Buick GMC of Lakewood, NJ Jim Curley GMC of Keyport , NJ
Read moreDealership Experience
3 yrs, 8 mos
Industry Experience
39 yrs, 3 mos
Languages Spoken
English
94 Reviews
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94 Reviews of John Duncsak
February 03, 2026
Jim Curley Buick GMC did an outstanding job throughout my process in purchasing my 2022 GMC Canyon. My Salesperson Frank Mazza was truly remarkable in his knowledge of the trade, transparency, his profession process in purchasing my 2022 GMC Canyon. My Salesperson Frank Mazza was truly remarkable in his knowledge of the trade, transparency, his professionalism and how he treats potential/existing customers. The same can be said about Big John and their Sales Manager. My time there was smooth. Go get your next truck here. More
by EthanHBerm
Other Employees Tagged: Frank Mazza
January 28, 2026
The dealership is excellent, the people are attentive and competent. I will recommend it to my friends. competent. I will recommend it to my friends. More
by souza_bruno
Other Employees Tagged: Cynthia Rothschild , Damen Krone
January 21, 2026
Frank Mazza our salesman and the management/finance team of John Duncsak and Damen Krone were extremely professional, knowledgeable, helpful and personable while going through the recent purchase of our 202 of John Duncsak and Damen Krone were extremely professional, knowledgeable, helpful and personable while going through the recent purchase of our 2026 GMC Terrain. They were very easy to deal with and made the buying process very relaxing and comfortable. My wife and me highly recommend Jim Curley GMC for purchasing and/or servicing a vehicle. We have purchased several vehicles from this dealership in the past and have always been treated nicely. We also have our vehicles serviced by them and are always satisfied with the care that they put into our vehicles. More
by buchekonopka
Other Employees Tagged: Frank Mazza , Damen Krone
January 20, 2026
The process was so painless, the service was incredible, and I could not be more excited for my new car and I could not be more excited for my new car More
by johnb18
Other Employees Tagged: Cynthia Rothschild
January 18, 2026
Couldn’t be happier with my service this morning. Cynthia greeted me at the door and answered all questions. I was confident in my purchase and felt I was getting a very fair deal. Service was quick Cynthia greeted me at the door and answered all questions. I was confident in my purchase and felt I was getting a very fair deal. Service was quick and convenient. Highly recommend this dealership and Cynthia! More
by KShahbahrami
Other Employees Tagged: Cynthia Rothschild
January 15, 2026
The dealership is conveniently located within a short drive from home. This is the second vehicle purchased here in the past 10 years. The overall experience was very good. drive from home. This is the second vehicle purchased here in the past 10 years. The overall experience was very good. More
by Carlpetlik
Other Employees Tagged: Edward Smuda
January 13, 2026
They were lots of help and I love my new truck Cynthia was a lot of help was a lot of help More
by ericz03
Other Employees Tagged: Cynthia Rothschild
January 09, 2026
Amazing service and wonderful people to work with. Not your typical pushy sales person. Definitely will continue to do business with them Not your typical pushy sales person. Definitely will continue to do business with them More
by Theboss1217
Other Employees Tagged: Chris Cotten, Cynthia Rothschild
January 07, 2026
Cynthia was absolutely amazing. I went to go look for a new truck with my mom and I had a great experience. She was incredible and helped me get the perfect truck. She greeted us th I went to go look for a new truck with my mom and I had a great experience. She was incredible and helped me get the perfect truck. She greeted us the minute we walked in and got to helping us right away she didn't waste any time! Joe was great too and the manager John! Would definitely come back. More
by Victoria.lombardi24
Other Employees Tagged: Chris Cotten, Cynthia Rothschild
January 06, 2026
This is a place/ dealer were the people make you relax comfortably and offer you coffee/water/snacks/ hot chocolate the works comfortably and offer you coffee/water/snacks/ hot chocolate the works More
by Rawjah1
Other Employees Tagged: Cynthia Rothschild
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