Best Buick Dealerships in Riverside-San Bernardino, Ranked by CarEdge Data

This is the CarEdge Dealer Transparency Index ranking for Buick dealers in the Riverside-San Bernardino metro. We graded every Buick dealer in the area with enough verified out-the-door quotes to score with confidence — using real PDFs, emails, and signed deals, not Google star ratings.

5 Buick dealers in Riverside-San Bernardino cleared the data threshold this quarter. It’s a smaller field — 4 more Buick dealers are tracked below but do not yet have enough verified quotes to grade — so treat this as a focused shortlist and still gather your own quotes. Here’s how they rank.

About the CarEdge Dealer Transparency Index

Most dealer rankings come from Google star ratings and Yelp reviews — easy to game, impossible to verify. The CarEdge Dealer Transparency Index is different. We score every dealer using verified out-the-door quotes: real PDFs, emails, and screenshots from actual transactions.

Each dealer’s transparency score (out of 100) is weighted across four dimensions:

• Fee Transparency (30%) — Is the doc fee reasonable compared to the state average?
• Add-on Behavior (30%) — How often does the dealer bundle add-ons, and at what cost?
• Price Accuracy (30%) — Does the listing price match the actual OTD price?
• Data Quality (10%) — More verified quotes mean higher confidence in the grade.

Grades: A (90–100), B (80–89), C (70–79), D (60–69), F (below 60).

Top 5 Buick Dealers in Riverside-San Bernardino

Ranked by CarEdge transparency score, highest to lowest. Each dealer profile links to the full review with verified out-the-door quotes.

#1 — Simpson Buick Gmc

Grade: A · Score: 100/100 · Buena Park, CA

Simpson Buick Gmc is the top-graded Buick dealer in the Riverside-San Bernardino metro by verified data — A grade, 100/100, based on 5 verified OTD quotes.

• Doc fee: $85 — well below the CA average of $111
• Add-ons: None detected in verified quotes
• Listing accuracy: 7.0% below the advertised listing
• Verified quotes: 5

See full review & verified quotes →

#2 — Hardin Buick Gmc

Grade: A · Score: 95/100 · Anaheim, CA

Hardin Buick Gmc holds the A grade across 21 verified OTD quotes — a substantial sample size.

• Doc fee: $26 — well below the CA average of $111
• Add-ons: 5% of quotes, avg $175
• Listing accuracy: 1.8% above the advertised listing
• Verified quotes: 21

See full review & verified quotes →

#3 — Hatfield Buick Gmc

Grade: A · Score: 91/100 · Redlands, CA

Hatfield Buick Gmc keeps add-ons on just 17% of verified quotes — light for an A-grade dealer.

• Doc fee: $21 — well below the CA average of $111
• Add-ons: 17% of quotes, avg $50
• Listing accuracy: 0.7% above the advertised listing
• Verified quotes: 12

See full review & verified quotes →

#4 — Temecula Valley Buick Gmc

Grade: A · Score: 91/100 · Temecula, CA

Add-ons showed on only 20% of Temecula Valley Buick Gmc’s verified quotes — restrained by segment standards.

• Doc fee: $68 — well below the CA average of $111
• Add-ons: 20% of quotes, avg $650
• Listing accuracy: 2.1% above the advertised listing
• Verified quotes: 5

See full review & verified quotes →

#5 — Tustin Buick Gmc

Grade: F · Score: 59/100 · Tustin, CA

Tustin Buick Gmc is the lowest-graded Buick dealer in the Riverside-San Bernardino metro by verified data. Add-ons appear on 92% of verified quotes, averaging $4,333. Quoted prices run 9.3% above the advertised listing. Bring data and be ready to walk.

• Doc fee: $85 — well below the CA average of $111
• Add-ons: 92% of quotes, avg $4,333
• Listing accuracy: 9.3% above the advertised listing
• Verified quotes: 12

See full review & verified quotes →

Limited Data

These Buick dealers in the Riverside-San Bernardino metro have verified OTD data, but not yet enough to assign a confident grade. We’re actively collecting more quotes for these dealers.

• Caposio Buick Gmc (Victorville, CA) — based on 1 verified OTD quote. View dealer page
• Dutton Buick Gmc (Riverside, CA) — based on 1 verified OTD quote. View dealer page
• Boulevard Buick/Gmc (Signal Hill, CA) — based on 3 verified OTD quotes. View dealer page
• Thorson Buick Gmc (Pasadena, CA) — based on 2 verified OTD quotes. View dealer page

Riverside-San Bernardino Buick Dealer Rankings at a Glance

#	Dealer	City	Grade	Score	Doc Fee	Add-Ons	Quotes
1	Simpson Buick Gmc	Buena Park	A	100	$85	$0	5
2	Hardin Buick Gmc	Anaheim	A	95	$26	$175	21
3	Hatfield Buick Gmc	Redlands	A	91	$21	$50	12
4	Temecula Valley Buick Gmc	Temecula	A	91	$68	$650	5
5	Tustin Buick Gmc	Tustin	F	59	$85	$4,333	12

These rankings are a quarterly snapshot. For the continuously updated list — including dealers rated since this article was published — see the live Buick dealer rankings near Riverside-San Bernardino on the CarEdge Dealer Transparency Index.

Compare Buick Dealers in Other Metros

CarEdge has graded Buick dealers in 23 US metros using verified out-the-door quotes. Compare other markets:

• Best Buick Dealerships in Phoenix
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How to Use This Data When You Shop

1. Get an OTD quote in writing before you visit. Any dealer can send a worksheet by email — if they won’t, that’s a red flag.
2. Ask for a quote with zero add-ons. Everything in the F&I office is optional. Say “please remove all dealer add-ons” and see what the price does.
3. Anchor to the OTD, not the listing. Dealers with a gap between advertised price and final OTD aren’t being straight with you. Don’t negotiate off the listing number.
4. Compare three dealers minimum. Even within the same metro, doc fees, add-on policies, and listing accuracy vary widely. Use this ranking as your shortlist.

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Rankings are generated from the CarEdge Dealer Transparency Index, a public methodology that scores dealers on verified out-the-door quotes — not Google star ratings or paid placements. Data updated quarterly. Last updated: Q3 2026.