What is the best GMC dealership in Boston?

Quirk Buick Gmc (Manchester, NH) earns the top grade on the CarEdge Dealer Transparency Index — A grade with a transparency score of 100/100, based on 4 verified out-the-door quotes.

Where should I buy a GMC in Boston?

Start with Quirk Buick Gmc in Manchester, NH, the highest-graded GMC dealer in Boston on the CarEdge Dealer Transparency Index (A grade, 100/100 across 4 verified quotes). Compare it with Marty's Gmc-Buick (Kingston) and Mcgovern Gmc Of Westborough (Westborough). Ask each dealer for an itemized out-the-door quote in writing before you visit, and compare the totals, not the advertised prices.

Are GMC dealers in Boston honest?

By verified quote data, two of the 4 GMC dealers CarEdge grades in Boston earn an A for price transparency, while one adds dealer add-ons to at least 30% of quotes. Quirk Buick Gmc ranks highest. Every grade comes from real out-the-door quotes, not star ratings.

How does CarEdge rank GMC dealers in Boston?

Rankings come from the CarEdge Dealer Transparency Index, which scores every dealer using verified out-the-door quotes — not Google star ratings. Each dealer's transparency score weights four dimensions: Fee Transparency (30%), Add-on Behavior (30%), Price Accuracy (30%), and Data Quality (10%). Grades range from A (90+) to F (below 60).

Which GMC dealer in Boston has the lowest doc fees?

Quirk Buick Gmc in Manchester charges $499 on doc fees, based on 4 verified out-the-door quotes. The NH state benchmark is $603.

Which GMC dealer in Boston has the most verified pricing data?

Mastria Gmc in Raynham has 6 verified out-the-door quotes tracked by CarEdge — one of the deepest datasets in the Boston metro. Their CarEdge Dealer Transparency Index grade is D (60/100).

Which GMC dealer in Boston should I shop with caution?

Mastria Gmc in Raynham earns the lowest grade on this ranking (D, 60/100) based on 6 verified out-the-door quotes. Add-ons appeared on 0% of verified quotes. Get an OTD quote in writing before you visit.

Is there a CarEdge Certified GMC dealer in Boston?

Not yet. The nearest CarEdge Certified GMC dealer is Key Chevrolet Gmc Ofnewport in Newport, NH, about 90 miles from Boston. CarEdge Certified dealers hold an A grade on the CarEdge Dealer Transparency Index and guarantee four things on every deal: an all-in out-the-door price up front, no surprise add-ons, fast, real answers, and an honest, no-pressure experience. CarEdge verifies the guarantee with ongoing AI mystery shops, and a dealer that slips below an A grade loses the badge. Certification is earned from data, never bought.

What does CarEdge Certified mean?

CarEdge Certified dealers hold an A grade on the CarEdge Dealer Transparency Index and guarantee four things on every deal: an all-in out-the-door price up front, no surprise add-ons, fast, real answers, and an honest, no-pressure experience. CarEdge verifies the guarantee with ongoing AI mystery shops, and a dealer that slips below an A grade loses the badge. Certification is earned from data, never bought.

Dealer Reviews

Best GMC Dealerships in Boston, Ranked by CarEdge Data

Zach Shefska

August 20, 2026 7 min read

Featured image for Best GMC Dealerships in Boston, Ranked by CarEdge Data

Key Takeaways

4 GMC dealers in Boston graded using verified out-the-door quotes — not Google star ratings.
Quirk Buick Gmc is the highest-graded GMC dealer in the Boston metro.
Mastria Gmc earns the lowest grade — verified data shows below-average transparency across 6 quotes.
Get an OTD quote in writing before you visit any dealer. CarEdge tracks real prices, not advertised ones.

This is the CarEdge Dealer Transparency Index ranking for GMC dealers in the Boston 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.

4 GMC dealers in Boston currently clear the data threshold. It’s a smaller field — 11 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 September 29, 2026. CarEdge refreshes these rankings daily as new verified out-the-door quotes come in.

The Best GMC Dealers in Boston

The best GMC dealer in Boston by verified out-the-door price data is Quirk Buick Gmc (Manchester, NH): A grade, 100/100 across 4 verified quotes, with no dealer add-ons in any verified quote.

Close behind:

Marty’s Gmc-Buick (Kingston), A grade, 99/100 across 4 verified quotes, with no dealer add-ons in any verified quote.
Mcgovern Gmc Of Westborough (Westborough), B grade, 81/100 across 5 verified quotes, with quotes that match the advertised price.

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

Top 4 GMC Dealers in Boston

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

#1 — Quirk Buick Gmc

Grade: A · Score: 100/100 · Manchester, NH

Quirk Buick Gmc is the top-graded GMC dealer in the Boston metro by verified data — A grade, 100/100, based on 4 verified OTD quotes.

Doc fee: $499 — below the NH average of $603
Add-ons: None detected in verified quotes
Listing accuracy: Quoted price matches the advertised listing
Verified quotes: 4

See full review & verified quotes →

#2 — Marty’s Gmc-Buick

Grade: A · Score: 99/100 · Kingston, MA

Marty’s Gmc-Buick quoted prices 3.9% below the advertised listing — the kind of discount that rewards getting the OTD in writing.

Doc fee: $595 — above the MA average of $556
Add-ons: None detected in verified quotes
Listing accuracy: 3.9% below the advertised listing
Verified quotes: 4

See full review & verified quotes →

#3 — Mcgovern Gmc Of Westborough

Grade: B · Score: 81/100 · Westborough, MA

Mcgovern Gmc Of Westborough quotes prices within 0.3% of the advertised listing — one of the cleanest pricing patterns on this list.

Doc fee: $595 — above the MA average of $556
Add-ons: 80% of quotes, avg $1,038
Listing accuracy: Quoted price matches the advertised listing
Verified quotes: 5

See full review & verified quotes →

#4 — Mastria Gmc

Grade: D · Score: 60/100 · Raynham, MA

Mastria Gmc grades a D at 60/100 across 6 verified quotes — the lowest on this list. Get a written OTD and compare before you commit.

Doc fee: Not available
Add-ons: None detected in verified quotes
Listing accuracy: 2.3% above the advertised listing
Verified quotes: 6

See full review & verified quotes →

Limited Data

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

Tulley Buick Gmc (Nashua, NH) — based on 3 verified OTD quotes. View dealer page
Battles Buick Gmc (Bourne, MA) — based on 1 verified OTD quote. View dealer page
Hurd Auto Mall Gmc (Johnston, RI) — based on 1 verified OTD quote. View dealer page
Diamond Gmc (Auburn, MA) — based on 1 verified OTD quote. View dealer page
Quirk Buick Gmc Of Braintree (Braintree, MA) — based on 3 verified OTD quotes. View dealer page
Vachon Gmc Of Mansfield (Mansfield, MA) — based on 3 verified OTD quotes. View dealer page
Central Gmc Of Norwood (Norwood, MA) — based on 2 verified OTD quotes. View dealer page
Albrecht Buick Gmc Of Wakefield (Wakefield, MA) — based on 2 verified OTD quotes. View dealer page
Alden Gmc (Fairhaven, MA) — based on 1 verified OTD quote. View dealer page
Tasca Buick Gmc Woonsocket (Woonsocket, RI) — based on 1 verified OTD quote. View dealer page
Gmc Danvers (Danvers, MA) — based on 0 verified OTD quotes. 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.

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).

Boston GMC Dealer Rankings at a Glance

#	Dealer	City	Grade	Score	Doc Fee	Add-Ons	Quotes
1	Quirk Buick Gmc	Manchester	A	100	$499	$0	4
2	Marty’s Gmc-Buick	Kingston	A	99	$595	$0	4
3	Mcgovern Gmc Of Westborough	Westborough	B	81	$595	$1,038	5
4	Mastria Gmc	Raynham	D	60	—	$0	6

Compare GMC Dealers in Other Metros

CarEdge has graded GMC dealers in 27 US metros using verified out-the-door quotes. Compare other markets:

How to Use This Data When You Shop

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.
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.
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.
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.

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.

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