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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
104 Reviews

Dealership Experience

5 yrs, 11 mos

Industry Experience

22 yrs, 1 mo

Specialties & Trainings

Certified Top Performer 10+ Years

Chevrolet Mark of Excellence Award Winner 10+ Years

View more specialties & trainings
4.9

104 Reviews

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104 Reviews of Jonathan DeSimoni

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

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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

Dealership Rating
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

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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

May 17, 2025

Dealership Rating
Employee Rating

Great! Excellent service Everyone is friendly from Timothy, Jonathan and Derek. They catered to our needs and what would make us satisfied with our purchase More

by efelicia41
Recommend Dealer
Yes

Other Employees Tagged: Jonathan DeSimoni

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May 17, 2025

Diamond Chevrolet of San Bernardino responded

Thank you for your wonderful review! I'm thrilled to hear that you had an excellent experience at Diamond Chevrolet of San Bernardino. It's great to know that Timothy, Jonathan, and Derek provided you with friendly service and catered to your needs. We're proud to support our federal employees and first responders with discounts. We look forward to seeing you again! Best, Israel Mora (909) 883-8833

May 14, 2025

Dealership Rating
Employee Rating

Staff were friendly and helpful with the needs that I was looking in a vehicle. More

by alcantar0816
Service Price Transparency
Workmanship
Service Time
Service Communication
Recommend Dealer
Yes

Other Employees Tagged: Luis Rojas, Jason Johnson, Timothy Kubo, Elizabeth Ornelas, Duc Nguyen, Mitchell Vallejo, Jeramie Diaz, Max Moreno, Salina Adcock

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May 14, 2025

Diamond Chevrolet of San Bernardino responded

Thank you for your wonderful review! We're thrilled to hear that our team at Diamond Chevrolet of San Bernardino was friendly and helpful in meeting your vehicle needs. We appreciate your feedback and look forward to assisting you again in the future! Best, Israel Mora (909) 883-8833

April 17, 2025

Dealership Rating
Employee Rating

Quick and efficient friendly process Wonderful experience Took the time to make sure we understand everything More

by aurorameza7685
Recommend Dealer
Yes

Other Employees Tagged: Jonathan DeSimoni

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Apr 17, 2025

Diamond Chevrolet of San Bernardino responded

Thank you for your wonderful review! I'm thrilled to hear that you had a quick, efficient, and friendly experience at Diamond Chevrolet of San Bernardino. Our team is dedicated to ensuring that you understand everything, and we appreciate your kind words. We look forward to assisting you again in the future! Best, Israel Mora (909) 883-8833

April 04, 2025

Dealership Rating
Employee Rating

It was a pleasure buying from Diamond Chevrolet. Jonathan and Elizabeth were great to deal with, very informative. More

by kevinsliger63
Sales Price Transparency
Purchase Time
Finance Experience
Recommend Dealer
Yes

Other Employees Tagged: Elizabeth Ornelas, Joseph Gotti

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Apr 04, 2025

Diamond Chevrolet of San Bernardino responded

Thank you for your wonderful review! We're thrilled to hear that you had a great experience at Diamond Chevrolet of San Bernardino and that Jonathan and Elizabeth provided you with excellent service. We appreciate your feedback and look forward to seeing you again soon! Best, Israel Mora (909) 883-8833

March 30, 2025

Dealership Rating
Employee Rating

It was quick, and easy. Everyone we interacted was nice All the staff at Diamond Chevrolet was attentive, helpful and respected our time. More

by zein.chanel
Recommend Dealer
Yes

Other Employees Tagged: Jonathan DeSimoni

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Mar 31, 2025

Diamond Chevrolet of San Bernardino responded

Thank you for your wonderful review! We truly appreciate your kind words about our team at Diamond Chevrolet of San Bernardino. We're so glad to hear that you found the process quick and easy, and that our staff was attentive and helpful. We look forward to your next visit! Best, Israel Mora (909) 883-8833

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