Staff

ANTHONY SINGH
Finance Manager

ZACH ELLIS
GENERAL SALES MANAGER

SEAN GRUBER
Sales and Leasing Consultant

RICH BOUKER
Sales and Leasing Consultant

PRINCESS MERCEDES
Sales and Leasing Consultant

DEVIN HAWES
Sales and Leasing Consultant

CHARLIE HAWKINS
USED CAR MANAGER

KENNY HUNTER
Sales and Leasing Consultant

JOE DELPRETE
Sales and Leasing Consultant

HALIE WILDER
Internet Manager

BRANDON LARGE
Sales and Leasing Consultant

JOSEPH TROTT
SALES MANAGER

Nicholas Boynton
Sales and Leasing Consultant

Amanda Shafer
Sales and Leasing Consultant

ANTHONY SINGH
Finance Manager
Mar 10, 2025
SEAN was personable.
SEAN was personable. He was knowledgeable and got answers to the questions we asked. He worked to help us get our ducks in a row. He incited us to come back if we had additional questions. He helped with tech questions and helped us get set up.
Mar 09, 2025
Devin was great and knowledgeable, good experience.
Devin was great and knowledgeable, good experience. and will recommend him to friends and family.
Mar 07, 2025
I didn't have to wait very long.
I didn't have to wait very long. I was in and out within 30 minutes.
Feb 28, 2025
Extremely pleased with Devin, as well as Zach and
Extremely pleased with Devin, as well as Zach and Anthony. They all went above and beyond to get us in our new Acadia!
Feb 26, 2025
Absolutely outstanding service and the Sullivan team
Absolutely outstanding service and the Sullivan team always goes above and beyond to make feel at home and a valued customer. I won’t go to another dealership. Zach the general sales manager is top notch and every manager in the regional could learn well from him. It truly shows with the team he has built!

ZACH ELLIS
GENERAL SALES MANAGER
Mar 07, 2025
I didn't have to wait very long.
I didn't have to wait very long. I was in and out within 30 minutes.
Feb 28, 2025
Extremely pleased with Devin, as well as Zach and
Extremely pleased with Devin, as well as Zach and Anthony. They all went above and beyond to get us in our new Acadia!
Feb 26, 2025
Absolutely outstanding service and the Sullivan team
Absolutely outstanding service and the Sullivan team always goes above and beyond to make feel at home and a valued customer. I won’t go to another dealership. Zach the general sales manager is top notch and every manager in the regional could learn well from him. It truly shows with the team he has built!
Feb 26, 2025
Very pleasant and clean atmosphere.
Very pleasant and clean atmosphere. Salesperson Amanda Shafer was wonderful to work with. Love my new car.
Feb 17, 2025
The sales and parts department went out of the way to try
The sales and parts department went out of the way to try and find what I was looking for and explain my options. Rich bowker was extremely helpful and tracking down the truck I wanted and making it available. His follow-up after the sale was much appreciated.

SEAN GRUBER
Sales and Leasing Consultant
Mar 10, 2025
SEAN was personable.
SEAN was personable. He was knowledgeable and got answers to the questions we asked. He worked to help us get our ducks in a row. He incited us to come back if we had additional questions. He helped with tech questions and helped us get set up.
Mar 07, 2025
Very happy with Sullivan gmc and Sean as my sales rep,
Very happy with Sullivan gmc and Sean as my sales rep, great service and will tell family and friends.
Mar 03, 2025
I have bought 3 trucks cash from this dealership and all
I have bought 3 trucks cash from this dealership and all 3xs it has been a good experience.
Feb 26, 2025
At first Sullivan did me dirty after puting a down
At first Sullivan did me dirty after puting a down deposit to hold the truck, then they told me it’s going to a different dealership because we have a buyer right now! I was furious then a couple days goes by they said I have the truck here it’s yours. Sean did a great job and I can’t forget about Charles Hawkins! They made it right after what had happened to me! I did not want the truck after what the president did it me or whoever pulled that shenanigan on me! But overall happy!
Feb 24, 2025
I keep returning to buy new vehicles and Sullivan is
I keep returning to buy new vehicles and Sullivan is where I get them serviced!

RICH BOUKER
Sales and Leasing Consultant
Mar 07, 2025
Very happy with Sullivan gmc and Sean as my sales rep,
Very happy with Sullivan gmc and Sean as my sales rep, great service and will tell family and friends.
Feb 25, 2025
I love this dealership.
I love this dealership. Bought a SUV years ago from Rich and if and when I ever buy another one, it will be from Rich. Service Dept is great. Always received excellent service and everything is always explained to me. Everyone is so polite and courteous
Feb 22, 2025
Cooperative, courteous, open and responsive.
Cooperative, courteous, open and responsive. Good experience. We're conscious of my time and responsive to questions
Feb 17, 2025
The sales and parts department went out of the way to try
The sales and parts department went out of the way to try and find what I was looking for and explain my options. Rich bowker was extremely helpful and tracking down the truck I wanted and making it available. His follow-up after the sale was much appreciated.
Feb 07, 2025
Everyone went out of their way to facilitate and make as
Everyone went out of their way to facilitate and make as painless as possible my purchase of a new GMC. I would highly recommend this dealership to anyone looking for a vehicle. Staff is very efficient and knowledgeable. Thank You for a great experience!

PRINCESS MERCEDES
Sales and Leasing Consultant
Mar 07, 2025
Very happy with Sullivan gmc and Sean as my sales rep,
Very happy with Sullivan gmc and Sean as my sales rep, great service and will tell family and friends.
Feb 03, 2025
The new car purchase process was not a hassle and finance
The new car purchase process was not a hassle and finance did get me a better loan rate.
Jan 29, 2025
She understood what i was looking for and accomplished it
She understood what i was looking for and accomplished it by finding the right car for me. She listens and took my consideration in my search and found me my vehicle.
Jan 22, 2025
Everyone at Sullivan made our buying experience wonderful
Everyone at Sullivan made our buying experience wonderful Princess was a pleasure to deal with and Mr Hawkins the manager was very friendly and helpful, no one was pushy they were all friendly and helpful
Jan 16, 2025
Princess —great, not pushy, very helpful.
Princess —great, not pushy, very helpful. You should give her a raise. Anthony great. I always feel we could do better on trade-in values but overall very happy.

DEVIN HAWES
Sales and Leasing Consultant
Mar 09, 2025
Devin was great and knowledgeable, good experience.
Devin was great and knowledgeable, good experience. and will recommend him to friends and family.
Mar 07, 2025
Very happy with Sullivan gmc and Sean as my sales rep,
Very happy with Sullivan gmc and Sean as my sales rep, great service and will tell family and friends.
Feb 28, 2025
Extremely pleased with Devin, as well as Zach and
Extremely pleased with Devin, as well as Zach and Anthony. They all went above and beyond to get us in our new Acadia!
Jan 25, 2025
I actually thought my dream truck was not in their
I actually thought my dream truck was not in their inventory. But I got a call back the next day and it had all but the 360 live cameras and sunroof. Still satisfied.
Jan 23, 2025
Devin was awesome deal with very knowledgeable with the
Devin was awesome deal with very knowledgeable with the programs, I have to say Zach was awesome to deal with also, he went over and beyond to make me happy.. Thanks very much time and patience.

CHARLIE HAWKINS
USED CAR MANAGER
Feb 26, 2025
At first Sullivan did me dirty after puting a down
At first Sullivan did me dirty after puting a down deposit to hold the truck, then they told me it’s going to a different dealership because we have a buyer right now! I was furious then a couple days goes by they said I have the truck here it’s yours. Sean did a great job and I can’t forget about Charles Hawkins! They made it right after what had happened to me! I did not want the truck after what the president did it me or whoever pulled that shenanigan on me! But overall happy!
Jan 29, 2025
She understood what i was looking for and accomplished it
She understood what i was looking for and accomplished it by finding the right car for me. She listens and took my consideration in my search and found me my vehicle.
Jan 25, 2025
I actually thought my dream truck was not in their
I actually thought my dream truck was not in their inventory. But I got a call back the next day and it had all but the 360 live cameras and sunroof. Still satisfied.
Jan 22, 2025
Everyone at Sullivan made our buying experience wonderful
Everyone at Sullivan made our buying experience wonderful Princess was a pleasure to deal with and Mr Hawkins the manager was very friendly and helpful, no one was pushy they were all friendly and helpful
Jan 14, 2025
The staff are always very courteous and professional in
The staff are always very courteous and professional in the Service department. The waiting room is always clean

KENNY HUNTER
Sales and Leasing Consultant
Mar 07, 2025
I didn't have to wait very long.
I didn't have to wait very long. I was in and out within 30 minutes.
Mar 07, 2025
Very happy with Sullivan gmc and Sean as my sales rep,
Very happy with Sullivan gmc and Sean as my sales rep, great service and will tell family and friends.
Feb 19, 2025
Kenny was friendly and professional, the whole team made
Kenny was friendly and professional, the whole team made the process quick and easy, from start to finish.
Feb 12, 2025
When I checked in for my oil change, I estimate if they
When I checked in for my oil change, I estimate if they would check the pressure in my tires and he said that was part of the service after I left I checked my tire pressure. They never even checked it.
Jan 25, 2025
I actually thought my dream truck was not in their
I actually thought my dream truck was not in their inventory. But I got a call back the next day and it had all but the 360 live cameras and sunroof. Still satisfied.

JOE DELPRETE
Sales and Leasing Consultant
Mar 07, 2025
Very happy with Sullivan gmc and Sean as my sales rep,
Very happy with Sullivan gmc and Sean as my sales rep, great service and will tell family and friends.
Feb 06, 2025
The staff were really helpful and pleasant to talk to.
The staff were really helpful and pleasant to talk to. Mr. Beach was kind and helpful.
Jan 24, 2025
Everything a properly operated dealership could be.
Everything a properly operated dealership could be. Jay, Joe, and Anthony were awesome!! The dealership is easy to get to, extremely clean and nice, and staffed with extremely accommodating people. We couldn't be more completely satisfied with the dealership, the staff, or the vehicle we purchased.
Jan 19, 2025
The sales person Joe Delprete was great, very helpful,
The sales person Joe Delprete was great, very helpful, courteous. Things went well, a great team!
Jan 09, 2025
We have been doing business with Sullivans for several
We have been doing business with Sullivans for several years. We have always found the salespeople to be very friendly and knowledgeable. We have purchased either four or five vehicles from them and service is excellent. Wouldn’t go anywhere else.

HALIE WILDER
Internet Manager
Mar 07, 2025
I didn't have to wait very long.
I didn't have to wait very long. I was in and out within 30 minutes.
Feb 26, 2025
Absolutely outstanding service and the Sullivan team
Absolutely outstanding service and the Sullivan team always goes above and beyond to make feel at home and a valued customer. I won’t go to another dealership. Zach the general sales manager is top notch and every manager in the regional could learn well from him. It truly shows with the team he has built!
Feb 08, 2025
The service was quick and efficient.
The service was quick and efficient. Haley, the sales rep was polite and very attentive to my needs. I highly recommend Sullivan Cadillac and GMC
Feb 04, 2025
Went into the showroom to consider changing my lease and
Went into the showroom to consider changing my lease and came out purchasing my new car. Cannot say enough great things about the staff and dealership! Halie answered all my questions made buying my new car stress free highly recommend her! She helped me through the process with no pressure and made the whole experience actually enjoyable! Thank you Haile and all the staff at Sullivan GMC/Buick. Honest, helpful and friendly people, thank you.
Feb 03, 2025
Great service!
Great service! Stayed late on a Sunday so we could get our truck, and gave us a great deal!

BRANDON LARGE
Sales and Leasing Consultant
Mar 14, 2025
They did a great job with my vehicle.
They did a great job with my vehicle. It was ready earlier than promised. Thank you
Mar 09, 2025
Sullivan made our purchase hassle free.
Sullivan made our purchase hassle free. We didn’t have to spend our whole day at the dealership, they were very mindful of our time. Brandon was an exceptional salesman.
Mar 07, 2025
Very happy with Sullivan gmc and Sean as my sales rep,
Very happy with Sullivan gmc and Sean as my sales rep, great service and will tell family and friends.
Mar 05, 2025
Brandon Large was professional, courteous, knew the
Brandon Large was professional, courteous, knew the product well and handled everything in a timely manner
Feb 12, 2025
Only problem is I was promised a fill up with gas.
Only problem is I was promised a fill up with gas. They must have forgot.

JOSEPH TROTT
SALES MANAGER
Mar 08, 2025
The service personal were knowledgeable and courteous.
The service personal were knowledgeable and courteous. They made the whole experience smooth and easy.
Feb 08, 2025
The service was quick and efficient.
The service was quick and efficient. Haley, the sales rep was polite and very attentive to my needs. I highly recommend Sullivan Cadillac and GMC
Jan 25, 2025
I actually thought my dream truck was not in their
I actually thought my dream truck was not in their inventory. But I got a call back the next day and it had all but the 360 live cameras and sunroof. Still satisfied.
Jan 04, 2025
The dealership was awesome.
The dealership was awesome. They did have some good negotiations for my vehicles, but they were fair in the end. Everyone was very pleasant. Use this dealership. Jared d’Avi
Dec 18, 2024
I went in to see about leasing a new car, as my lease was
I went in to see about leasing a new car, as my lease was up on my GMC sierra. Unfortunately I moved from Michigan and couldn’t go to my original dealer. I was told they could handle my buy out process but charge a doc fee of 75 dollars. I was assured that would be it. They use a fancy desktop type computer and finance scrolls through it and doesn’t go over all the numbers. Just took me to the initial part. I figured we were good since we just got done discussing I wouldn’t be paying a 898 doc fee. When I got home I looked over the paper copies and sure enough they got me for the 898 doc fee. I assumed the extra fees were related to certifying the vehicle as the finance guy AJ said that’s how they got the interest rate down in the loan was buy doing the used car certification I was paying for. Come to find out that didn’t happen either. They do their best to confuse you on numbers like showing the market value and putting a discount on the market value of the car or blue book price to make it look like they are not baking fees in. Its unfortunate that dealers continue to take advantage of people and feel they should make 900 dollars for generating some documents from gm and spending less than an hour on the documents. This is more than doctors make an hour. Not sure why Sullivan feels so entitled. Won’t return.

Nicholas Boynton
Sales and Leasing Consultant
Mar 07, 2025
Very happy with Sullivan gmc and Sean as my sales rep,
Very happy with Sullivan gmc and Sean as my sales rep, great service and will tell family and friends.
Mar 05, 2025
Good team work will to work with me on the cost and trade
Good team work will to work with me on the cost and trade in could have been a little more than I received.
Mar 03, 2025
They we're all so nice and helpful they made my day .
They we're all so nice and helpful they made my day .Thanks for everything you done for me.
Feb 26, 2025
Absolutely outstanding service and the Sullivan team
Absolutely outstanding service and the Sullivan team always goes above and beyond to make feel at home and a valued customer. I won’t go to another dealership. Zach the general sales manager is top notch and every manager in the regional could learn well from him. It truly shows with the team he has built!
Feb 22, 2025
Cooperative, courteous, open and responsive.
Cooperative, courteous, open and responsive. Good experience. We're conscious of my time and responsive to questions

Amanda Shafer
Sales and Leasing Consultant
Mar 07, 2025
Very happy with Sullivan gmc and Sean as my sales rep,
Very happy with Sullivan gmc and Sean as my sales rep, great service and will tell family and friends.
Feb 26, 2025
Very pleasant and clean atmosphere.
Very pleasant and clean atmosphere. Salesperson Amanda Shafer was wonderful to work with. Love my new car.
Feb 20, 2025
Wonderful over all experience.
Wonderful over all experience. I bought my last vehicle from you and had a great experience then also. So I knew I would be coming back to your dealership. Amanda was great. Charlie is always so nice and personable, a joy to talk to. Thank you so much for everything. See you again for my next truck.