Dealer Group
Diamond Automotive Group
6 locations across California
Diamond Automotive Group operates 6 franchised locations across 1 state. This page rolls up 15 verified out-the-door quotes from every locations, rated on fee transparency, add-on behavior, and listing-to-final-price accuracy.
15 verified quotes · Data since 2025
ChevroletFordGMCHyundaiMazda
D65 / 100
Score Breakdown
Fee Transparency (30%)100/100
Add-on Behavior (30%)59.3/100
Price Accuracy (30%)80.2/100
Data Quality (10%)100/100
Grade Distribution
Across 6 rated locations
A
1
B
0
C
2
D
0
F
3
17% of locations earned a B or better.
Key Insights
Transparency Score
Scores 65/100, 21.6 points below the national average of 86.6/100.
Add-on Frequency
73% of transactions include an add-on, 55% more often than the national average of 18%.
Listing-to-OTD Gap
Prices run 3.0% above listing on average, better than the national average of 103.3%.
Top performers in this group
123
Diamond Hyundai Palmdale
Palmdale, CA
A
Diamond GMC Of Banning
Banning, CA
C
Diamond Chevrolet Of San Bernardino
San Bernardino, CA
C
Locations with D or below: 3 — Diamond Chevrolet Of Banning, Diamond Ford, Diamond Mazda
All rated locations
Showing 6 of 6
| Dealer | Location | Grade | Score | Quotes | Brand | Doc Fee | Add-on Rate |
|---|---|---|---|---|---|---|---|
| Diamond Hyundai Palmdale | Palmdale, CA | A | 98 | 8 | — | $85 | 13% |
| Diamond GMC Of Banning | Banning, CA | C | 76 | 1 | — | $85 | 100% |
| Diamond Chevrolet Of San Bernardino | San Bernardino, CA | C | 76 | 3 | — | $85 | 100% |
| Diamond Chevrolet Of Banning | Banning, CA | F | 49 | 2 | — | $85 | 50% |
| Diamond Ford | Lancaster, CA | F | 43 | 1 | — | $85 | 100% |
| Diamond Mazda | Lancaster, CA | F | 0 | 0 | Mazda | — | — |
Group locations
6 locations across California