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Jonathan DeSimoni
Jonathan DeSimoni at Diamond Chevrolet of San Bernardino

Jonathan DeSimoni

Internet Sales / Fleet Manager

Diamond Chevrolet of San Bernardino

909 W 21st Street
San Bernardino, CA 92405

Contact Me
4.9
119 Reviews

Dealership Experience

6 yrs, 5 mos

Industry Experience

22 yrs, 7 mos

Specialties & Trainings

Certified Top Performer 10+ Years

Chevrolet Mark of Excellence Award Winner 10+ Years

4.9

119 Reviews

Write a Review

119 Reviews of Jonathan DeSimoni

December 25, 2025

Dealership Rating
Employee Rating

Jonathan , And Elizabeth helped me out greatly Helped me out with all questions I asked More

by suavecitom
Recommend Dealer
Yes

Other Employees Tagged: Jonathan DeSimoni

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Dec 26, 2025

Diamond Chevrolet of San Bernardino responded

Thank you for your wonderful review! I'm thrilled to hear that Jonathan and Elizabeth were able to assist you effectively at Diamond Chevrolet of San Bernardino. We appreciate your feedback and hope to see you again soon! Best, Michael Salas msalas@daliaauto.com

December 07, 2025

Dealership Rating
Employee Rating

Excellent customer service Outstanding customer service made the process go smoothly ?? Outstanding customer service from Jonathan and team, made the process go smoothly. More

by jess562cali209
Recommend Dealer
Yes

Other Employees Tagged: Jonathan DeSimoni

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Dec 08, 2025

Diamond Chevrolet of San Bernardino responded

Thank you, Jess! I truly appreciate your kind words about the outstanding customer service you received from Jonathan and our team at Diamond Chevrolet of San Bernardino. I'm thrilled to hear that we made the process smooth for you. We look forward to seeing you again for any future needs! Best, Michael Salas msalas@daliaauto.com

November 10, 2025

Dealership Rating
Employee Rating

They were very helpful and gave me what I wanted. Jonathan is a great salesman. He called me as soon as I messaged him online. More

by LAKERS924
Recommend Dealer
Yes

Other Employees Tagged: Jonathan DeSimoni

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Nov 11, 2025

Diamond Chevrolet of San Bernardino responded

Thank you for your wonderful review! I'm thrilled to hear that you had a positive experience at Diamond Chevrolet of San Bernardino and that Jonathan was able to assist you effectively. Your satisfaction is our priority, and we appreciate your kind words. We look forward to seeing you again soon! Best, Michael Salas msalas@daliaauto.com

November 06, 2025

Dealership Rating
Employee Rating

Very professional. Nice. Not pushy. Very helpful They were very professional. Made the entire process easy. They did not push and was honest about what they offered. No More

by deryl1960
Recommend Dealer
Yes

Other Employees Tagged: Jonathan DeSimoni

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Nov 07, 2025

Diamond Chevrolet of San Bernardino responded

Thank you for your wonderful review! I'm thrilled to hear that you found Diamond Chevrolet of San Bernardino to be professional and helpful throughout the process. Our team strives to create a transparent and comfortable experience for our customers, so it’s great to know that we met your expectations. We appreciate your feedback and look forward to seeing you again soon! Best, Michael Salas msalas@daliaauto.com

October 19, 2025

Dealership Rating
Employee Rating

They came with a deal that was I couldn’t refuse. Thanks to Timothy for the help to make this happen for us More

by Bumindabak02
Sales Price Transparency
Purchase Time
Finance Experience
Recommend Dealer
Yes

Other Employees Tagged: Timothy Kubo , Antonio Diaz

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Oct 19, 2025

Diamond Chevrolet of San Bernardino responded

Thank you for your wonderful review! I'm thrilled to hear that you found a deal you couldn't refuse at Diamond Chevrolet of San Bernardino. A special shoutout to Timothy for his assistance in making your experience positive. We look forward to serving you again in the future! Best, Michael Salas msalas@daliaauto.com

September 08, 2025

Dealership Rating
Employee Rating

Very professionally handled the paper work very fast friendly they make the deal happen great prices More

by saintj1976
Sales Price Transparency
Trade-in Experience
Purchase Time
Finance Experience
Recommend Dealer
Yes

Other Employees Tagged: Luis Rojas

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Sep 08, 2025

Diamond Chevrolet of San Bernardino responded

Thank you for your fantastic review! I'm glad to hear that you found the paperwork process at Diamond Chevrolet of San Bernardino to be fast and professional. Our team strives to create a friendly atmosphere and secure great deals for our customers. We appreciate your feedback and hope to see you again soon! Best, Michael Salas msalas@daliaauto.com

August 31, 2025

Dealership Rating
Employee Rating

Very friendly staff, had a great experience, would recommend them to all my friends and family More

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

Other Employees Tagged: Luis Rojas, Jason Johnson, Elizabeth Ornelas

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Aug 31, 2025

Diamond Chevrolet of San Bernardino responded

Thank you for your review! I'm glad you had a great experience with our friendly staff at Diamond Chevrolet of San Bernardino. Your recommendation means a lot to us. We look forward to welcoming you and your friends and family in the future. Best, Michael Salas msalas@daliaauto.com

August 31, 2025

Dealership Rating
Employee Rating

This is my 3 car I am very bless w you guys. Thank you very much.. More

by nancyh071678@gmail.com
Sales Price Transparency
Trade-in Experience
Purchase Time
Finance Experience
Recommend Dealer
Yes

Other Employees Tagged: Luis Rojas, Elizabeth Ornelas

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Aug 31, 2025

Diamond Chevrolet of San Bernardino responded

Thank you so much, Nancy! I am pleased to know you're happy with your experience at Diamond Chevrolet of San Bernardino. We appreciate your loyalty in choosing us for your third vehicle and look forward to helping you again soon. Best, Michael Salas msalas@daliaauto.com

August 31, 2025

Dealership Rating
Employee Rating

Good people and great service. Very helpful and accommodating. Ruben our car salesman was wonderful. More

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

Other Employees Tagged: Ruben Bugarin Ramos

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Aug 31, 2025

Diamond Chevrolet of San Bernardino responded

Thank you so much for your feedback, Alonso! I am happy to hear you had a great experience with us at Diamond Chevrolet of San Bernardino. It's great to know that Ruben provided you with the outstanding service we strive for. We look forward to assisting you again. Best, Michael Salas msalas@daliaauto.com

August 01, 2025

Dealership Rating
Employee Rating

Stopped in and purchased a new suburban from these folks. Process was seamless and all costs were very transparent. Each individual we worked with was so cool, would definitely buy from them again. More

by cwidder100
Sales Price Transparency
Purchase Time
Finance Experience
Recommend Dealer
Yes

Other Employees Tagged: Derek

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Aug 02, 2025

Diamond Chevrolet of San Bernardino responded

Thank you for your wonderful review! I am glad to hear that your experience purchasing a new Suburban at Diamond Chevrolet of San Bernardino was seamless and transparent. Our team truly appreciates your kind words, and we look forward to assisting you again in the future. Don't hesitate to share your experience with others! Best, Michael Salas msalas@daliaauto.com

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