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 November 12, 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 Woody Buick Gmc Of Naperville (Naperville, IL): A grade, 100/100 across 15 quotes from the past year, with no quoted add-ons in its 15 quotes from the past year.

Close behind:

2. Woody Buick Gmc Of Gurnee (Gurnee), A grade, 98/100 across 14 quotes from the past year, with no quoted add-ons in its 14 quotes from the past year.
3. Mike Haggerty Buick Gmc (Oak Lawn), A grade, 98/100 across 6 quotes from the past year, with no quoted add-ons in its 6 quotes from the past year.

Best for:

• Lowest dealer fees: Napleton Auto Group (Libertyville), $344, against the IL median of $397.
• No quoted add-ons: Woody Buick Gmc Of Naperville (Naperville), none in its 15 quotes from the past year.
• Most quotes, past year: Woody Buick Gmc Of Naperville (Naperville), 15 quotes from the past year behind its A.

Among the A and B dealers ranked on this page.

Full ranking, dealer fees and quoted add-ons for every graded dealer are below.

Top 14 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 — Woody Buick Gmc Of Naperville

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

Woody Buick Gmc Of Naperville is the top-graded Buick dealer in Illinois by verified data — A grade, 100/100, based on 15 quotes from the past year.

• Dealer fees: $378 — below the IL median of $397
• Quoted add-ons: None in 15 quotes from the past year
• Quotes, past year: 15

See full review & verified quotes →

#2 — Woody Buick Gmc Of Gurnee

Grade: A · Score: 98/100 · Gurnee, IL

Woody Buick Gmc Of Gurnee put no quoted add-ons on any of its 14 quotes from the past year — rare for an A-grade Buick dealer.

• Dealer fees: $413 — above the IL median of $397
• Quoted add-ons: None in 14 quotes from the past year
• Quotes, past year: 14

See full review & verified quotes →

#3 — Mike Haggerty Buick Gmc

Grade: A · Score: 98/100 · Oak Lawn, IL

Not one of Mike Haggerty Buick Gmc’s 6 quotes from the past year carried a quoted add-on — a clean record at the A grade.

• Dealer fees: $378 — below the IL median of $397
• Quoted add-ons: None in 6 quotes from the past year
• Quotes, past year: 6

See full review & verified quotes →

#4 — Castle Buick Gmc

Grade: A · Score: 96/100 · North Riverside, IL

Castle Buick Gmc put quoted add-ons on just 14% of its quotes from the past year — light for an A-grade dealer.

• Dealer fees: $378 — below the IL median of $397
• Quoted add-ons: On 1 of 7 quotes from the past year (14%)
• Quotes, past year: 7

See full review & verified quotes →

#5 — Napleton Buick Gmc Crystal Lake

Grade: A · Score: 96/100 · Crystal Lake, IL

Napleton Buick Gmc Crystal Lake put no quoted add-ons on any of its 4 quotes from the past year — rare for an A-grade Buick dealer.

• Dealer fees: $550 — above the IL median of $397
• Quoted add-ons: None in 4 quotes from the past year
• Quotes, past year: 4

See full review & verified quotes →

#6 — Arlington Heights Buick Gmc

Grade: A · Score: 95/100 · Arlington Heights, IL

Arlington Heights Buick Gmc earns an A-grade on the CarEdge Dealer Transparency Index, based on 9 quotes from the past year.

• Dealer fees: $413 — above the IL median of $397
• Quoted add-ons: On 3 of 9 quotes from the past year (33%)
• Quotes, past year: 9

See full review & verified quotes →

#7 — Al Piemonte Buick Gmc

Grade: A · Score: 93/100 · Elmhurst, IL

Not one of Al Piemonte Buick Gmc’s 5 quotes from the past year carried a quoted add-on — a clean record at the A grade.

• Dealer fees: $378 — below the IL median of $397
• Quoted add-ons: None in 5 quotes from the past year
• Quotes, past year: 5

See full review & verified quotes →

#8 — Lighthouse Buick Gmc

Grade: A · Score: 92/100 · Morton, IL

Quoted add-ons showed on only 13% of Lighthouse Buick Gmc’s quotes from the past year — restrained by segment standards.

• Dealer fees: $412 — above the IL median of $397
• Quoted add-ons: On 1 of 8 quotes from the past year (13%)
• Quotes, past year: 8

See full review & verified quotes →

#9 — Cardinal Buick Gmc Inc

Grade: A · Score: 91/100 · Belleville, IL

Cardinal Buick Gmc Inc earns an A-grade on the CarEdge Dealer Transparency Index, based on 4 quotes from the past year.

• Dealer fees: $368 — below the IL median of $397
• Quoted add-ons: On 3 of 4 quotes from the past year (75%)
• Quotes, past year: 4

See full review & verified quotes →

#10 — Napleton Auto Group

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

Napleton Auto Group earns an A-grade on the CarEdge Dealer Transparency Index, based on 6 quotes from the past year.

• Dealer fees: $344 — below the IL median of $397
• Quoted add-ons: On 5 of 6 quotes from the past year (83%)
• Quotes, past year: 6

See full review & verified quotes →

#11 — Bill Kay Buick Gmc

Grade: B · Score: 88/100 · Downers Grove, IL

Bill Kay Buick Gmc earns a solid B on verified data — dealer fees at or below the IL median. The one watch-out: quoted add-ons show on 40% of its quotes from the past year.

• Dealer fees: $378 — below the IL median of $397
• Quoted add-ons: On 2 of 5 quotes from the past year (40%)
• Quotes, past year: 5

See full review & verified quotes →

#12 — Laura Buick Gmc

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

Laura Buick Gmc put quoted add-ons on just 17% of its quotes from the past year — light for a B-grade dealer.

• Dealer fees: $599 — above the IL median of $397
• Quoted add-ons: On 1 of 6 quotes from the past year (17%)
• Quotes, past year: 6

See full review & verified quotes →

#13 — Arnie Bauer Cadillac Buick Gmc

Grade: B · Score: 80/100 · Matteson, IL

Not one of Arnie Bauer Cadillac Buick Gmc’s 5 quotes from the past year carried a quoted add-on — a clean record at the B grade.

• Dealer fees: $729 — above the IL median of $397
• Quoted add-ons: None in 5 quotes from the past year
• Quotes, past year: 5

See full review & verified quotes →

#14 — Lou Bachrodt Auto Mall

Grade: D · Score: 61/100 · Rockford, IL

Lou Bachrodt Auto Mall grades a D — quoted add-ons appear on 67% of its quotes from the past year. Ask for an itemized OTD before signing.

• Dealer fees: $729 — above the IL median of $397
• Quoted add-ons: On 4 of 6 quotes from the past year (67%)
• Quotes, past year: 6

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.

Only quotes from the past year count. We split them into four groups, newest first: the newest counts 50%, then 30%, 15% and 5%.

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

• Fee Transparency (30%) — Are the dealer’s fees reasonable? We add up every dealer fee and compare the total with the state median.
• Add-on Behavior (30%) — How often does the dealer include quoted add-ons like paint protection or theft deterrent, the kind you can’t say no to? Add-ons the dealer marks as optional don’t count against them.
• Price Accuracy (30%) — Does the advertised price include every charge you have to pay? We check each quote against the vehicle page: dealer fees, add-ons, the advertised price and the discount.
• Data Quality (10%) — Does the quote list taxes, dealer fees, add-ons and government fees each on its own line? Each one is worth a quarter.

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

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 Effingham, IL
• Best Buick Dealerships near Quincy, IL
• Best Buick Dealerships near Ottawa, IL

Illinois Buick Dealer Rankings at a Glance

#	Dealer	City	Grade	Score	Dealer Fees	Quoted Add-ons	Quotes, Past Year
1	Woody Buick Gmc Of Naperville	Naperville	A	100	$378	None	15
2	Woody Buick Gmc Of Gurnee	Gurnee	A	98	$413	None	14
3	Mike Haggerty Buick Gmc	Oak Lawn	A	98	$378	None	6
4	Castle Buick Gmc	North Riverside	A	96	$378	14%	7
5	Napleton Buick Gmc Crystal Lake	Crystal Lake	A	96	$550	None	4
6	Arlington Heights Buick Gmc	Arlington Heights	A	95	$413	33%	9
7	Al Piemonte Buick Gmc	Elmhurst	A	93	$378	None	5
8	Lighthouse Buick Gmc	Morton	A	92	$412	13%	8
9	Cardinal Buick Gmc Inc	Belleville	A	91	$368	75%	4
10	Napleton Auto Group	Libertyville	A	90	$344	83%	6
11	Bill Kay Buick Gmc	Downers Grove	B	88	$378	40%	5
12	Laura Buick Gmc	Collinsville	B	87	$599	17%	6
13	Arnie Bauer Cadillac Buick Gmc	Matteson	B	80	$729	None	5
14	Lou Bachrodt Auto Mall	Rockford	D	61	$729	67%	6

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 advertised price. Dealers with a gap between advertised price and final OTD aren’t being straight with you. Don’t negotiate off the advertised number.
4. Compare three dealers minimum. Even within the same metro, dealer fees, quoted add-ons and advertised price 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.