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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
109 Reviews

Dealership Experience

6 yrs

Industry Experience

22 yrs, 2 mos

Specialties & Trainings

Certified Top Performer 10+ Years

Chevrolet Mark of Excellence Award Winner 10+ Years

4.9

109 Reviews

Write a Review

109 Reviews of Jonathan DeSimoni

July 20, 2025

Dealership Rating
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 Musharbash, 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

Dealership Rating
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

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 Musharbash , 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

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 29, 2025

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Employee Rating

Everyone was friendly and knowledgeable. Explained how everything worked in my new truck. I'll be buying my next vehicle here. More

by GLHANGEL7
Sales Price Transparency
Trade-in Experience
Purchase Time
Finance Experience
Recommend Dealer
Yes

Other Employees Tagged: Luis Rojas, Timothy Kubo, Elizabeth Ornelas

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Jun 29, 2025

Diamond Chevrolet of San Bernardino responded

Thank you for your wonderful review! We at Diamond Chevrolet of San Bernardino are thrilled to hear that you found our team friendly and knowledgeable, and that you felt well-informed about your new truck. We truly appreciate your commitment to returning for your next vehicle purchase. We look forward to seeing you again soon! Best, Israel Mora (909) 883-8833

June 02, 2025

Dealership Rating
Employee Rating

Good guy and good experience. Thanks for the quick turnaround. I would recommend to others. More

by jestep75
Sales Price Transparency
Purchase Time
Finance Experience
Recommend Dealer
Yes
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Jun 02, 2025

Diamond Chevrolet of San Bernardino responded

Thank you so much for your feedback! It's great to hear you had a good experience at Diamond Chevrolet of San Bernardino. Your recommendation means a lot to us. We look forward to assisting you again in the future. Best, Israel Mora (909) 883-8833

May 31, 2025

Dealership Rating
Employee Rating

Jonathan and the underwriters really took great care of me. I was turning in two leases. They explained all my options and answered all my questions. No attitude. Very patient. Trust me, I wasn’t easy. More

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

Other Employees Tagged: Sam and Derek

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May 31, 2025

Diamond Chevrolet of San Bernardino responded

Thank you for your wonderful review! We're thrilled to hear that Jonathan and our team, including Sam and Derek, provided you with such great care during your lease turn-ins. It's our goal at Diamond Chevrolet of San Bernardino to make every experience seamless and easy. We appreciate your loyalty and can't wait to see you again in three years! If you have any questions in the meantime, feel free to reach out. Safe travels in your vehicles! Best, Israel Mora (909) 883-8833

May 30, 2025

Dealership Rating
Employee Rating

Could not have been easier to buy a truck hete. Zero pressure Super friendly and NO hassle or try to upsell. Very happy I went there. More

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

Other Employees Tagged: Luis Rojas, Joseph Gotti , Derek

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May 30, 2025

Diamond Chevrolet of San Bernardino responded

Thank you for your wonderful review! We're thrilled to hear that your experience at Diamond Chevrolet of San Bernardino was so positive and hassle-free. Our team strives to create a friendly atmosphere without any pressure, and it's great to know that you felt that during your visit. We appreciate your feedback and look forward to assisting you again in the future! Enjoy your new truck! Best, Israel Mora (909) 883-8833

May 27, 2025

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Employee Rating

Good dealer, friendly people. Everybody's up to point. Big selection in trucks, I enjoy my day More

by SERGIO.CANO909
Sales Price Transparency
Trade-in Experience
Purchase Time
Finance Experience
Recommend Dealer
Yes

Other Employees Tagged: Ruben Bugarin Ramos, Andrew Nevarez, Antonio Diaz , Alonso Rivera

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May 28, 2025

Diamond Chevrolet of San Bernardino responded

Thank you for your wonderful review! We're thrilled to hear that you had a positive experience at Diamond Chevrolet of San Bernardino. It's great to know that you enjoyed our friendly team and our selection of trucks. We appreciate your feedback and look forward to seeing you again soon! Best, Israel Mora (909) 883-8833

May 25, 2025

Dealership Rating
Employee Rating

Jonathan was awesome, having gone through the Costco car purchase program made the whole process painless. I found the car I wanted, for the price I could live with. Jonathan also delivered the car to my ho More

by JPAxelsson
Purchase Time
Finance Experience
Recommend Dealer
Yes

Other Employees Tagged: Luis Rojas

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May 25, 2025

Diamond Chevrolet of San Bernardino responded

Thank you for your wonderful review! We're thrilled to hear you had a fantastic experience with Jonathan at Diamond Chevrolet of San Bernardino. It's great to know that the Costco car purchase program made the process easy for you and that you found the perfect car. We truly appreciate your recommendation and hope to see you again for any of your future automotive needs! Best, Israel Mora (909) 883-8833

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