Dealer Group
Diamond Automotive Group
6 locations across California
Diamond Automotive Group operates 6 franchised locations across 1 state. This page rolls up 17 verified out-the-door quotes from 5 of its locations, rated on fee transparency, add-on behavior, and listing-to-final-price accuracy.
17 verified quotes · Data since 2025
ChevroletFordGMCHyundaiMazda
C76 / 100
Score Breakdown
Fee Transparency (30%)100/100
Add-on Behavior (30%)61.8/100
Price Accuracy (30%)87.8/100
Data Quality (10%)100/100
Grade Distribution
Across 5 rated locations
A
1
B
1
C
2
D
0
F
1
40% of locations earned a B or better.
Key Insights
Transparency Score
Scores 76/100, 10.4 points below the national average of 86.4/100.
Add-on Frequency
59% of transactions include an add-on, 42% more often than the national average of 18%.
Listing-to-OTD Gap
Prices run 1.7% above listing on average, better than the national average of 97.1%.
Top performers in this group
123
Diamond Hyundai Palmdale
Palmdale, CA
A
Diamond GMC of Banning
Banning, CA
B
Diamond Chevrolet of San Bernardino
San Bernardino, CA
C
Locations with D or below: 1 — Diamond Ford
All 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 | B | 88 | 2 | — | $85 | 50% |
| Diamond Chevrolet of San Bernardino | San Bernardino, CA | C | 76 | 3 | — | $85 | 100% |
| Diamond Chevrolet of Banning | Banning, CA | C | 70 | 3 | — | $85 | 33% |
| Diamond Ford | Lancaster, CA | F | 46 | 1 | — | $85 | 100% |
| Diamond Mazda | Lancaster, CA | Not yetrated | — | — | — | — | — |
Group locations
6 locations across California