Best GMC Dealerships in Massachusetts, Ranked by CarEdge Data
This is the CarEdge Dealer Transparency Index ranking for GMC dealers across Massachusetts. We grade dealers using verified out-the-door quotes — real PDFs, emails, and signed deals — not Google star ratings.
We graded every GMC dealer in Massachusetts 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 30, 2026. CarEdge refreshes these rankings daily as new verified out-the-door quotes come in.
What is the best GMC dealer in Massachusetts?
The best GMC dealer in Massachusetts by verified out-the-door price data is Marty’s Gmc-Buick (Kingston, MA): A grade, 99/100 across 4 verified quotes, with no dealer add-ons in any verified quote.
Close behind:
- Quirk Buick Gmc Of Braintree (Braintree), A grade, 98/100 across 4 verified quotes, with no dealer add-ons in any verified quote.
- Vachon Gmc Of Mansfield (Mansfield), A grade, 94/100 across 4 verified quotes, with no dealer add-ons in any verified quote.
Best for:
- Lowest doc fee: Battles Buick Gmc (Bourne), $399, against the MA average of $556.
- No dealer add-ons: Marty’s Gmc-Buick (Kingston), none in any of its 4 verified quotes.
- Selling price under the listing: Marty’s Gmc-Buick (Kingston), quotes average 3.9% below the advertised price.
Among the A and B dealers ranked on this page.
Full ranking, fees and add-on data for every graded dealer are below.
Top 6 GMC Dealers in Massachusetts
Ranked by CarEdge transparency score, highest to lowest. Each dealer profile links to the full review with verified out-the-door quotes.
#1 — Marty’s Gmc-Buick
Grade: A · Score: 99/100 · Kingston, MA
Marty’s Gmc-Buick is the top-graded GMC dealer in Massachusetts by verified data — A grade, 99/100, based on 4 verified OTD quotes.
- 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 →
#2 — Quirk Buick Gmc Of Braintree
Grade: A · Score: 98/100 · Braintree, MA
Quirk Buick Gmc Of Braintree quoted prices 2.8% below the advertised listing — the kind of discount that rewards getting the OTD in writing.
- Doc fee: $556 — at the MA average
- Add-ons: None detected in verified quotes
- Listing accuracy: 2.8% below the advertised listing
- Verified quotes: 4
See full review & verified quotes →
#3 — Vachon Gmc Of Mansfield
Grade: A · Score: 94/100 · Mansfield, MA
Vachon Gmc Of Mansfield adds zero dealer add-ons in any verified quote — rare for an A-grade GMC dealer.
- Doc fee: $685 — well above the MA average of $556
- Add-ons: None detected in verified quotes
- Listing accuracy: 1.6% above the advertised listing
- Verified quotes: 4
See full review & verified quotes →
#4 — Battles Buick Gmc
Grade: A · Score: 93/100 · Bourne, MA
Verified quotes from Battles Buick Gmc came in 3.7% under the advertised listing.
- Doc fee: $399 — well below the MA average of $556
- Add-ons: None detected in verified quotes
- Listing accuracy: 3.7% below the advertised listing
- Verified quotes: 4
See full review & verified quotes →
#5 — Mcgovern Gmc Of Westborough
Grade: B · Score: 84/100 · Westborough, MA
Mcgovern Gmc Of Westborough earns a solid B on verified data — solid fundamentals. The one watch-out: add-ons show on 67% of quotes (avg $865).
- Doc fee: $595 — above the MA average of $556
- Add-ons: 67% of quotes, avg $865
- Listing accuracy: 2.3% below the advertised listing
- Verified quotes: 6
See full review & verified quotes →
#6 — 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: 3.8% below the advertised listing
- Verified quotes: 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.
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).
GMC Dealers by Metro in Massachusetts
Shopping a specific city? These metro-level rankings drill into GMC dealers near each major Massachusetts market:
Massachusetts GMC Dealer Rankings at a Glance
| # | Dealer | City | Grade | Score | Doc Fee | Add-Ons | Quotes |
|---|---|---|---|---|---|---|---|
| 1 | Marty’s Gmc-Buick | Kingston | A | 99 | $595 | $0 | 4 |
| 2 | Quirk Buick Gmc Of Braintree | Braintree | A | 98 | $556 | $0 | 4 |
| 3 | Vachon Gmc Of Mansfield | Mansfield | A | 94 | $685 | $0 | 4 |
| 4 | Battles Buick Gmc | Bourne | A | 93 | $399 | $0 | 4 |
| 5 | Mcgovern Gmc Of Westborough | Westborough | B | 84 | $595 | $865 | 6 |
| 6 | Mastria Gmc | Raynham | D | 60 | — | $0 | 6 |
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.
Sponsored by Insurify
Are you overpaying for car insurance?
Compare rates from top carriers in under 5 minutes. CarEdge users save an average of $996/year on auto insurance.
*Disclosure: CarEdge may earn a commission when you compare insurance quotes through our partner, Insurify. This does not influence our editorial content.*
