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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
115 Reviews

Dealership Experience

6 yrs, 3 mos

Industry Experience

22 yrs, 5 mos

Specialties & Trainings

Certified Top Performer 10+ Years

Chevrolet Mark of Excellence Award Winner 10+ Years

4.9

115 Reviews

Write a Review

115 Reviews of Jonathan DeSimoni

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

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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

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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

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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

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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

July 20, 2025

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Employee Rating

Luis and Sam the managers are amazing they helped me out get my wife a beautiful traverse👍👍👍 More

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

Other Employees Tagged: Luis Rojas, Elizabeth Ornelas, Ruben Bugarin Ramos, Nael Ghobrial, Richard Bash, Antonio Diaz, Dylan Maraj , Mathew Padilla, Mitchell Vallejo

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Jul 20, 2025

Diamond Chevrolet of San Bernardino responded

Thank you for your wonderful review! I'm thrilled to hear that both Sam and our team were able to help you find a beautiful Traverse for your wife. Your satisfaction means a lot to us at Diamond Chevrolet of San Bernardino. We hope to see you again soon! Best, Israel Mora (909) 883-8833

July 18, 2025

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Employee Rating

They were quick and efficient. Good to deal with over the phone and through messaging. More

by robert@consultmts.com
Sales Price Transparency
Purchase Time
Finance Experience
Recommend Dealer
Yes
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Jul 18, 2025

Diamond Chevrolet of San Bernardino responded

Thank you for your wonderful review, Robert! I appreciate your kind words about the quick and efficient service you received at Diamond Chevrolet of San Bernardino. It's great to hear that our team was helpful over the phone and through messaging. We look forward to assisting you again in the future! Best, Israel Mora (909) 883-8833

June 30, 2025

Dealership Rating
Employee Rating

Helped me out a lot very good to negotiate and friendly would recommend for the best deals More

by Lopeze478
Sales Price Transparency
Trade-in Experience
Purchase Time
Finance Experience
Recommend Dealer
Yes

Other Employees Tagged: Duc Nguyen

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Jul 01, 2025

Diamond Chevrolet of San Bernardino responded

Thank you for your fantastic review! We’re thrilled to hear that you had a great experience negotiating with us at Diamond Chevrolet of San Bernardino. We appreciate your recommendation and look forward to assisting you again in the future! Best, Israel Mora (909) 883-8833

June 30, 2025

Dealership Rating
Employee Rating

The dealership is very attentive to their customers and helpful in trying to get the best deal for their customers my experience was very pleasant and good I would recommend the dealership to future custom More

by toolfan75
Sales Price Transparency
Trade-in Experience
Purchase Time
Finance Experience
Recommend Dealer
Yes

Other Employees Tagged: Luis Rojas, Elizabeth Ornelas, Richard Bash , Mathew Padilla

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Jul 01, 2025

Diamond Chevrolet of San Bernardino responded

Thank you for your awesome review! We truly appreciate your kind words about your experience at Diamond Chevrolet of San Bernardino. It's fantastic to hear that our team was attentive and helpful in finding you the best deal. We look forward to assisting you with your future vehicle purchase and hope to see you again soon! Best, Israel Mora (909) 883-8833

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