Dealer Reviews
Service Reviews
Cars for Sale
Write a Review
Dealer Log In
View All Employees
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
114 Reviews

Dealership Experience

6 yrs, 2 mos

Industry Experience

22 yrs, 4 mos

Specialties & Trainings

Certified Top Performer 10+ Years

Chevrolet Mark of Excellence Award Winner 10+ Years

4.9

114 Reviews

Write a Review

114 Reviews of Jonathan DeSimoni

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

Report | Print
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

Report | Print
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

Report | Print
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

Report | Print
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

Report | Print
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

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 Bash, Antonio Diaz, Dylan Maraj , Mathew Padilla, Mitchell Vallejo

Report | Print
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
Report | Print
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 Bash , Mathew Padilla

Report | Print
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

Report | Print
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

Dealership Rating
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

Report | Print
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

1
2
...
12

Dealership Inventory (236 Vehicles)

new 2025 Chevrolet Silverado 1500 car, priced at $51,735
2025 Chevrolet Silverado 1500
new
Sterling Gray Metallic exterior
Automatic
Four-wheel Drive
$51,735
View Details
used 2021 Chevrolet Equinox car, priced at $15,786
2021 Chevrolet Equinox
used
Pacific Blue Metallic exterior
Automatic
Front-wheel Drive
$15,786
View Details
used 2019 Ford F-150 car, priced at $31,988
2019 Ford F-150
used
White exterior
Automatic
Four-wheel Drive
$31,988
View Details
used 2024 Chevrolet Silverado 1500 car, priced at $35,988
2024 Chevrolet Silverado 1500
used
Black exterior
Automatic
Rear-wheel Drive
$35,988
View Details
used 2023 Kia Soul car, priced at $17,688
2023 Kia Soul
used
Gravity Gray exterior
Automatic
Front-wheel Drive
$17,688
View Details
used 2021 Chevrolet Equinox car, priced at $22,185
2021 Chevrolet Equinox
used
Silver Ice Metallic exterior
Automatic
All-wheel Drive
$22,185
View Details
View All Inventory