John Duncsak
John Duncsak at Jim Curley GMC Lakewood

John Duncsak

Sales Manager

Jim Curley GMC Lakewood

1399 River Avenue
Lakewood, NJ 08701

Contact Me
5.0
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

Dealership Experience

3 yrs, 8 mos

Industry Experience

39 yrs, 3 mos

Languages Spoken

English English

5.0

94 Reviews

Write a Review

94 Reviews of John Duncsak

April 14, 2026

Dealership Rating
Employee Rating

Dealership was great & I had a very pleasant experience. Everyone was so friendly & went above & beyond to help me. Definitely would recommend to anyone looking for a GMC. And if you do go to Jim Curly More

by Kateb404
Sales Price Transparency
Trade-in Experience
Purchase Time
Finance Experience
Recommend Dealer
Yes

Other Employees Tagged: Frank Mazza

April 04, 2026

Dealership Rating
Employee Rating

Everyone was excellent and so helpful! Lauren set up our test drive and stopped by to meet us. Jack was just wonderful, he was so knowledgeable and walked us through the whole process. Joh More

by francabro511
Sales Price Transparency
Purchase Time
Finance Experience
Recommend Dealer
Yes

Other Employees Tagged: Jack Merwede

April 02, 2026

Dealership Rating
Employee Rating

Cynthia was so helpful in helping us to choose a new car for our growing family! We love our new ride and had a great experience. More

by shannon.mehra
Sales Price Transparency
Purchase Time
Recommend Dealer
Yes

Other Employees Tagged: Cynthia Rothschild

March 30, 2026

Dealership Rating
Employee Rating

I recently purchased a vehicle here and I have to tell you the experience was great! Dante Pizzi was an awesome. He took the time to explain every detail and answered all of my questions. John was also a More

by Llamothe06
Sales Price Transparency
Trade-in Experience
Purchase Time
Finance Experience
Recommend Dealer
Yes

Other Employees Tagged: Dante Pizzi

March 24, 2026

Dealership Rating
Employee Rating

Cynthia and her team were absolutely best, kind, knowledgeable and easy to deal with. Thank you for all your help to get the my first business car signed up, let’s hope there’s more to come. Thank y More

by Tuuli
Sales Price Transparency
Trade-in Experience
Purchase Time
Finance Experience
Recommend Dealer
Yes

Other Employees Tagged: Cynthia Rothschild

March 07, 2026

Dealership Rating
Employee Rating

Purchasing a new vehicle at Jim Curley GMC was one of the most pleasant experiences we have ever had. Our salesman, Carlos Martinez, was amazing and we highly recommend that anyone visiting the dealership More

by Marc O
Sales Price Transparency
Trade-in Experience
Purchase Time
Finance Experience
Recommend Dealer
Yes

Other Employees Tagged: Carlos Martinez , Damen Krone, Nicole Lara, Lauren Rivas

March 02, 2026

Dealership Rating
Employee Rating

Second vehicle leased from Cynthia. Friendly and great experience. Everyone we met knows the vehicles and options they come with. Assistance in setting up the vehicle is outstanding More

by sdelsontro2
Finance Experience
Recommend Dealer
Yes

March 01, 2026

Dealership Rating
Employee Rating

Friendly and respectful sales and finance team. They took the time to explain all the features in my new truck. More

by mannyf0078
Sales Price Transparency
Trade-in Experience
Purchase Time
Finance Experience
Recommend Dealer
Yes

Other Employees Tagged: Carlos Martinez

February 21, 2026

Dealership Rating
Employee Rating

What brought me to this dealer was they had the Sierra with configuration closest to my wants and needs. However I would not shop this dealer again. I got the truck I wanted and I’ve moved on so I’ll leav More

by jamesdlockwood
Sales Price Transparency
Purchase Time
Finance Experience
Recommend Dealer
No

Other Employees Tagged: Cynthia Rothschild

February 10, 2026

Dealership Rating
Employee Rating

Everyone was very kind , especially Carlos & John ! Loved dealing with them all so much my son went a bought a car from them a week later ! Definitely have good pricing ! More

by Kashmoney7640
Sales Price Transparency
Trade-in Experience
Purchase Time
Finance Experience
Recommend Dealer
Yes
1
...

Dealership Inventory (143 Vehicles)

new 2026 GMC Yukon XL car, priced at $87,147
2026 GMC Yukon XL
new
Onyx Black exterior
Automatic
Four-wheel Drive
new 2026 GMC Terrain car, priced at $31,537
2026 GMC Terrain
new
Summit White exterior
CVT
Front-wheel Drive
new 2026 GMC Sierra 1500 car, priced at $78,817
2026 GMC Sierra 1500
new
Glacier White exterior
Automatic
Four-wheel Drive
new 2026 GMC Acadia car, priced at $54,172
2026 GMC Acadia
new
Sterling exterior
Automatic
All-wheel Drive
new 2026 GMC Sierra 1500 car, priced at $55,752
2026 GMC Sierra 1500
new
Onyx Black exterior
Automatic
Four-wheel Drive
new 2026 GMC Terrain car, priced at $46,735
2026 GMC Terrain
new
Ebony Twilight Metallic exterior
Automatic
All-wheel Drive