Best Buick Dealerships in Illinois, Ranked by CarEdge Data

This is the CarEdge Dealer Transparency Index ranking for Buick dealers across Illinois. We grade dealers using verified out-the-door quotes — real PDFs, emails, and signed deals — not Google star ratings.

We graded every Buick dealer in Illinois with enough verified out-the-door quotes to score with confidence. If you’re shopping a specific metro, jump to the city-by-city rankings below for a tighter local shortlist.

Last updated October 22, 2026. CarEdge refreshes these rankings daily as new verified out-the-door quotes come in.

What is the best Buick dealer in Illinois?

The best Buick dealer in Illinois by verified out-the-door price data is Lighthouse Buick Gmc (Morton, IL): A grade, 100/100 across 5 verified quotes, with no dealer add-ons in any verified quote.

Close behind:

2. Napleton Buick Gmc Crystal Lake (Crystal Lake), A grade, 100/100 across 4 verified quotes, with no dealer add-ons in any verified quote.
3. Woody Buick-Gmc, Inc. (Naperville), A grade, 98/100 across 5 verified quotes, with no dealer add-ons in any verified quote.

Best for:

• Lowest doc fee: Cardinal Buick Gmc Inc (Belleville), $368, against the IL average of $369.
• No dealer add-ons: Mike Haggerty Buick Gmc (Oak Lawn), none in any of its 6 verified quotes.
• Selling price under the listing: Napleton Buick Gmc Crystal Lake (Crystal Lake), quotes average 5.8% below the advertised price.
• Most verified quotes: Woody Buick Gmc Of Gurnee (Gurnee), 32 verified quotes behind its A.

Among the A and B dealers ranked on this page.

Full ranking, fees and add-on data for every graded dealer are below.

Top 12 Buick Dealers in Illinois

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

#1 — Lighthouse Buick Gmc

Grade: A · Score: 100/100 · Morton, IL

Lighthouse Buick Gmc is the top-graded Buick dealer in Illinois by verified data — A grade, 100/100, based on 5 verified OTD quotes.

• Doc fee: $373 — above the IL average of $369
• Add-ons: None detected in verified quotes
• Listing accuracy: Quoted price matches the advertised listing
• Verified quotes: 5

See full review & verified quotes →

#2 — Napleton Buick Gmc Crystal Lake

Grade: A · Score: 100/100 · Crystal Lake, IL

Napleton Buick Gmc Crystal Lake quoted prices 5.8% below the advertised listing — the kind of discount that rewards getting the OTD in writing.

• Doc fee: $373 — above the IL average of $369
• Add-ons: None detected in verified quotes
• Listing accuracy: 5.8% below the advertised listing
• Verified quotes: 4

See full review & verified quotes →

#3 — Woody Buick-Gmc, Inc.

Grade: A · Score: 98/100 · Naperville, IL

Woody Buick-Gmc, Inc. adds zero dealer add-ons in any verified quote — rare for an A-grade Buick dealer.

• Doc fee: $378 — above the IL average of $369
• Add-ons: None detected in verified quotes
• Listing accuracy: 0.5% below the advertised listing
• Verified quotes: 5

See full review & verified quotes →

#4 — Woody Buick Gmc Of Gurnee

Grade: A · Score: 97/100 · Gurnee, IL

Woody Buick Gmc Of Gurnee earns the A grade with 32 verified OTD quotes — one of the deepest datasets on this list.

• Doc fee: $371 — above the IL average of $369
• Add-ons: 13% of quotes, avg $174
• Listing accuracy: 2.5% below the advertised listing
• Verified quotes: 32

See full review & verified quotes →

#5 — Bill Kay Buick Gmc

Grade: A · Score: 95/100 · Downers Grove, IL

Bill Kay Buick Gmc quotes prices within 0.1% of the advertised listing — one of the cleanest pricing patterns on this list.

• Doc fee: $376 — above the IL average of $369
• Add-ons: 17% of quotes, avg $216
• Listing accuracy: Quoted price matches the advertised listing
• Verified quotes: 6

See full review & verified quotes →

#6 — Castle Buick Gmc

Grade: A · Score: 95/100 · North Riverside, IL

Verified quotes from Castle Buick Gmc came in 5.1% under the advertised listing.

• Doc fee: $377 — above the IL average of $369
• Add-ons: 17% of quotes, avg $211
• Listing accuracy: 5.1% below the advertised listing
• Verified quotes: 6

See full review & verified quotes →

#7 — Mike Haggerty Buick Gmc

Grade: A · Score: 95/100 · Oak Lawn, IL

Not one verified quote from Mike Haggerty Buick Gmc carried a dealer add-on — a clean record at the A grade.

• Doc fee: $377 — above the IL average of $369
• Add-ons: None detected in verified quotes
• Listing accuracy: 2.0% above the advertised listing
• Verified quotes: 6

See full review & verified quotes →

#8 — Arnie Bauer Buick Gmc Cadillac

Grade: A · Score: 95/100 · Matteson, IL

Arnie Bauer Buick Gmc Cadillac keeps the F&I office out of it: no add-ons in any verified quote.

• Doc fee: $373 — above the IL average of $369
• Add-ons: None detected in verified quotes
• Listing accuracy: 1.2% above the advertised listing
• Verified quotes: 4

See full review & verified quotes →

#9 — Arlington Heights Buick Gmc

Grade: A · Score: 91/100 · Arlington Heights, IL

What Arlington Heights Buick Gmc advertises is what its verified quotes show — within 0.3% of listing.

• Doc fee: $374 — above the IL average of $369
• Add-ons: 46% of quotes, avg $458
• Listing accuracy: Quoted price matches the advertised listing
• Verified quotes: 11

See full review & verified quotes →

#10 — Laura Buick Gmc

Grade: A · Score: 90/100 · Collinsville, IL

Laura Buick Gmc quotes prices within 0.5% of the advertised listing — one of the cleanest pricing patterns on this list.

• Doc fee: $377 — above the IL average of $369
• Add-ons: 33% of quotes, avg $298
• Listing accuracy: 0.5% above the advertised listing
• Verified quotes: 6

See full review & verified quotes →

#11 — Cardinal Buick Gmc Inc

Grade: B · Score: 87/100 · Belleville, IL

Cardinal Buick Gmc Inc earns a solid B on verified data — a doc fee at or below the IL average. The one watch-out: add-ons show on 75% of quotes (avg $236).

• Doc fee: $368 — below the IL average of $369
• Add-ons: 75% of quotes, avg $236
• Listing accuracy: 1.4% below the advertised listing
• Verified quotes: 4

See full review & verified quotes →

#12 — Al Piemonte Buick Gmc

Grade: D · Score: 66/100 · Elmhurst, IL

Al Piemonte Buick Gmc carries the heaviest warnings on this list — add-ons appear on 100% of verified quotes, averaging $2,875, and quoted prices run 6.9% above the advertised listing. Anchor to the OTD, not the sticker.

• Doc fee: $374 — above the IL average of $369
• Add-ons: 100% of quotes, avg $2,875
• Listing accuracy: 6.9% above the advertised listing
• Verified quotes: 5

See full review & verified quotes →

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).

Buick Dealers by Metro in Illinois

Shopping a specific city? These metro-level rankings drill into Buick dealers near each major Illinois market:

• Best Buick Dealerships in Chicago
• Best Buick Dealerships near Quincy, IL
• Best Buick Dealerships near Ottawa, IL

Illinois Buick Dealer Rankings at a Glance

#	Dealer	City	Grade	Score	Doc Fee	Add-Ons	Quotes
1	Lighthouse Buick Gmc	Morton	A	100	$373	$0	5
2	Napleton Buick Gmc Crystal Lake	Crystal Lake	A	100	$373	$0	4
3	Woody Buick-Gmc, Inc.	Naperville	A	98	$378	$0	5
4	Woody Buick Gmc Of Gurnee	Gurnee	A	97	$371	$174	32
5	Bill Kay Buick Gmc	Downers Grove	A	95	$376	$216	6
6	Castle Buick Gmc	North Riverside	A	95	$377	$211	6
7	Mike Haggerty Buick Gmc	Oak Lawn	A	95	$377	$0	6
8	Arnie Bauer Buick Gmc Cadillac	Matteson	A	95	$373	$0	4
9	Arlington Heights Buick Gmc	Arlington Heights	A	91	$374	$458	11
10	Laura Buick Gmc	Collinsville	A	90	$377	$298	6
11	Cardinal Buick Gmc Inc	Belleville	B	87	$368	$236	4
12	Al Piemonte Buick Gmc	Elmhurst	D	66	$374	$2,875	5

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. CarEdge refreshes the rankings daily as new verified quotes come in.