Best GMC Dealerships in Hartford, Ranked by CarEdge Data

This is the CarEdge Dealer Transparency Index ranking for GMC dealers in the Hartford metro. We graded every GMC 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 GMC dealers in Hartford currently clear the data threshold. It’s a smaller field — 7 more GMC 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.

Last updated November 11, 2026. CarEdge refreshes these rankings daily as new verified out-the-door quotes come in.

What is the best GMC dealer in Hartford?

The best GMC dealer in Hartford by verified out-the-door price data is Gallagher Buick Gmc (New Britain, CT): A grade, 100/100 across 5 quotes from the past year, with no quoted add-ons in its 5 quotes from the past year.

Close behind:

2. Gates Gmc (Windham), A grade, 99/100 across 5 quotes from the past year, with $598 in dealer fees, under the CT median of $799.
3. Mario D’addario Buick Gmc (Shelton), A grade, 96/100 across 6 quotes from the past year, with $699 in dealer fees, under the CT median of $799.

Best for:

• Lowest dealer fees: Gates Gmc (Windham), $598, against the CT median of $799.
• No quoted add-ons: Gallagher Buick Gmc (New Britain), none in its 5 quotes from the past year.
• Most quotes, past year: Blasius Auto Group (Waterbury), 12 quotes from the past year behind its B.

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 5 GMC Dealers in Hartford

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

#1 — Gallagher Buick Gmc

Grade: A · Score: 100/100 · New Britain, CT

Gallagher Buick Gmc is the top-graded GMC dealer in the Hartford metro by verified data — A grade, 100/100, based on 5 quotes from the past year.

• Dealer fees: $729 — below the CT median of $799
• Quoted add-ons: None in 5 quotes from the past year
• Quotes, past year: 5

See full review & verified quotes →

#2 — Gates Gmc

Grade: A · Score: 99/100 · Windham, CT

Gates Gmc put quoted add-ons on just 20% of its quotes from the past year — light for an A-grade dealer.

• Dealer fees: $598 — below the CT median of $799
• Quoted add-ons: On 1 of 5 quotes from the past year (20%)
• Quotes, past year: 5

See full review & verified quotes →

#3 — Mario D’addario Buick Gmc

Grade: A · Score: 96/100 · Shelton, CT

Mario D’addario Buick Gmc earns an A-grade on the CarEdge Dealer Transparency Index, based on 6 quotes from the past year.

• Dealer fees: $699 — below the CT median of $799
• Quoted add-ons: On 2 of 6 quotes from the past year (33%)
• Quotes, past year: 6

See full review & verified quotes →

#4 — Blasius Auto Group

Grade: B · Score: 88/100 · Waterbury, CT

Quoted add-ons showed on only 17% of Blasius Auto Group’s quotes from the past year — restrained by segment standards.

• Dealer fees: $997 — above the CT median of $799
• Quoted add-ons: On 2 of 12 quotes from the past year (17%)
• Quotes, past year: 12

See full review & verified quotes →

#5 — Gmc Of Watertown

Grade: C · Score: 72/100 · Watertown, CT

Gmc Of Watertown’s dealer fees of $1,361 run $562 above the CT median of $799. Ask for an itemized OTD before signing.

• Dealer fees: $1,361 — above the CT median of $799
• Quoted add-ons: On 2 of 8 quotes from the past year (25%)
• Quotes, past year: 8

See full review & verified quotes →

Limited Data

These GMC dealers in the Hartford metro have verified OTD data, but not yet enough quotes from the past year to rank. We’re actively collecting more quotes for these dealers.

• Butler Gmc (Charlton, MA) — based on 1 quote from the past year. View dealer page
• Napoli Auto Xpress (Milford, CT) — based on 1 quote from the past year. View dealer page
• Vachon Gmc (Putnam, CT) — based on 2 quotes from the past year. View dealer page
• Balise Gmc (Springfield, MA) — based on 1 quote from the past year. View dealer page
• Brustolon Buick Gmc (Stonington, CT) — based on 1 quote from the past year. View dealer page
• Wallingford Gmc (Wallingford, CT) — based on 3 quotes from the past year. View dealer page
• Stephen Gmc (Bristol, CT) — based on 1 quote from the past year. View dealer page

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 →

Hartford GMC Dealer Rankings at a Glance

#	Dealer	City	Grade	Score	Dealer Fees	Quoted Add-ons	Quotes, Past Year
1	Gallagher Buick Gmc	New Britain	A	100	$729	None	5
2	Gates Gmc	Windham	A	99	$598	20%	5
3	Mario D’addario Buick Gmc	Shelton	A	96	$699	33%	6
4	Blasius Auto Group	Waterbury	B	88	$997	17%	12
5	Gmc Of Watertown	Watertown	C	72	$1,361	25%	8

For the live list, including dealers graded since this page last updated, see the live GMC dealer rankings near Hartford on the CarEdge Dealer Transparency Index.

Compare GMC Dealers in Other Metros

CarEdge has graded GMC dealers in 36 US metros using verified out-the-door quotes. Compare other markets:

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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 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.