Dealer Reviews
Service Reviews
Cars for Sale
Dealer Log In
Jonathan DeSimoni
Refer Me
Jonathan DeSimoni
Internet Sales / Fleet Manager
Diamond Chevrolet of San Bernardino
909 W 21st Street
San Bernardino, CA 92405
87 Reviews
Dealership Experience
5 yrs, 7 mos
Industry Experience
21 yrs, 9 mos
Specialties & Trainings
Certified Top Performer 10+ Years
Chevrolet Mark of Excellence Award Winner 10+ Years
Fleet Specialist
87 Reviews
Write a Review
87 Reviews of Jonathan DeSimoni
January 16, 2025
The best buying experience I’ve ever had. The process was expedited and everyone was extremely helpful, professional and friendly. The process was expedited and everyone was extremely helpful, professional and friendly. More
by zackjhamel
Verified CustomerOther Employees Tagged: David De La Mancha , Derek Parsons
January 11, 2025
Didn't appreciate the hassle of getting the manager to discount the "dealer options" that were not included in the asking price. Some dealers don't put them on the vehicle to begin with and that's what I discount the "dealer options" that were not included in the asking price. Some dealers don't put them on the vehicle to begin with and that's what I will look for in my next purchase from a dealership. More
by tjkracer
Other Employees Tagged: David De La Mancha, Duc Nguyen, Antonio Ramirez
January 04, 2025
Sell men knew their work and got the car of my choice. With delivery 2 my front door thanks With delivery 2 my front door thanks More
by neicolew106
Other Employees Tagged: Luis Rojas, Jason Johnson, Timothy Kubo, David De La Mancha, Duc Nguyen, Christian Gutierrez, Efrain Villegas Gomez , Eddie Brady, Eddie Rodriguez
December 13, 2024
A great place to buy a car I will tell all my family and friends to get a car from here...you have a great staff very easy to talk to and very courteous...Thankyou again friends to get a car from here...you have a great staff very easy to talk to and very courteous...Thankyou again More
by 666deau
Other Employees Tagged: Luis Rojas , Traveon Mannings
December 08, 2024
The experience was something I generally enjoy since we have purchased many vehicles over the years and being fans of Chevrolet in meeting our family needs in the past made it that much easier. Don’t reall have purchased many vehicles over the years and being fans of Chevrolet in meeting our family needs in the past made it that much easier. Don’t really agree with the philosophy of dealer ‘add-ons’ but looking at the big picture of this purchase, in the end, I was able to delete the majority of them albeit it took some effort and it turned out to be an equitable purchase for both parties. A dealership is only as good as its staff and Jonathan, Internet Director, should be credited with the highest rating available. He was responsive, courteous, professional and actively listened to our concerns and we ultimately bought the vehicle due to his efforts. Derek, Finance Director, was very good, too, but the pricing for the Chevrolet Warranties just couldn’t compete with the MOPAR Warranties that provided the same level of coverage. Would have purchased the warranty from Diamond had they been in the ball park of the cost of the MOPAR coverage. I appreciated Derek’s demeanor and he was not high pressure. Overall an excellent experience, staff is top notch, but the dealership needs to get rid of the unwanted dealer add-ons. They are extremely over priced and a major turn off for the customer. Thanks for reaching out Diamond. All the best to your team in the future! More
by stephenp75
Other Employees Tagged: Derek Parsons
November 30, 2024
I had a great experience with everyone involved! There was no xx at any point and I really appreciate that in this day and age. Shoutout to Jonathon! There was no xx at any point and I really appreciate that in this day and age. Shoutout to Jonathon! More
by Catherine
Other Employees Tagged: Luis Rojas, Duc Nguyen
November 26, 2024
Fast and efficient I liked how quickly they saw us and how nice they where to us how nice they where to us More
by GONZALEZPRISCILLA082
Other Employees Tagged: Elizabeth Ornelas , Eddie Brady
November 15, 2024
We received amazing deal & customer service! Would recommend Diamond Chevrolet to anyone! Jonathan was the best! Would recommend Diamond Chevrolet to anyone! Jonathan was the best! More
by jordantracey52
Other Employees Tagged: Luis Rojas
November 06, 2024
Helped me so much with buying my car I was grateful to have Jonathan! He has great communicating with me through the process! Definitely would go back to him to buy another car! (: have Jonathan! He has great communicating with me through the process! Definitely would go back to him to buy another car! (: More
by elexis.silver
November 03, 2024
Friendly salesman that work with the customers on cutting a Good deal leaving the buyer satisfied and happy with a new car. They’re upfront with their deals. The price they set you get. Very honest staff. I a Good deal leaving the buyer satisfied and happy with a new car. They’re upfront with their deals. The price they set you get. Very honest staff. I left happy and satisfied with my New 2025 Chevy Trax with an amazing deal. Thank you Diamond Chevrolet . More
by jackienunez86
Other Employees Tagged: Timothy Kubo, Elizabeth Ornelas, David De La Mancha, Christian Gutierrez, Cameron Smith, Griselda Reyna, Joseph Gotti , Sean K Henderson, Traveon Mannings
Dealership Inventory (215 Vehicles)
