Best GMC Dealerships in Houston, Ranked by CarEdge Data
This is the CarEdge Dealer Transparency Index ranking for GMC dealers in the Houston 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.
10 GMC dealers in Houston currently clear the data threshold. 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 Houston?
The best GMC dealer in Houston by verified out-the-door price data is Group 1 Gmc Southwest (Houston, TX): A grade, 97/100 across 5 quotes from the past year, with 5 quotes from the past year behind the grade.
Close behind:
- Group 1 Buick Gmc South (Houston), A grade, 97/100 across 20 quotes from the past year, with 20 quotes from the past year behind the grade.
- Gay Buick Gmc (Dickinson), A grade, 96/100 across 8 quotes from the past year, with 8 quotes from the past year behind the grade.
Best for:
- Most quotes, past year: Group 1 Buick Gmc South (Houston), 20 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 10 GMC Dealers in Houston
Ranked by CarEdge transparency score, highest to lowest. Each dealer profile links to the full review with verified out-the-door quotes.
#1 — Group 1 Gmc Southwest
Grade: A · Score: 97/100 · Houston, TX
Group 1 Gmc Southwest is the top-graded GMC dealer in the Houston metro by verified data — A grade, 97/100, based on 5 quotes from the past year.
- Quotes, past year: 5
See full review & verified quotes →
#2 — Group 1 Buick Gmc South
Grade: A · Score: 97/100 · Houston, TX
Group 1 Buick Gmc South holds the A grade across 20 quotes from the past year — a substantial sample size.
- Quotes, past year: 20
See full review & verified quotes →
#3 — Gay Buick Gmc
Grade: A · Score: 96/100 · Dickinson, TX
Gay Buick Gmc earns an A-grade on the CarEdge Dealer Transparency Index, based on 8 quotes from the past year.
- Quotes, past year: 8
See full review & verified quotes →
#4 — Group 1 Buick Gmc North
Grade: A · Score: 95/100 · Houston, TX
Group 1 Buick Gmc North earns an A-grade on the CarEdge Dealer Transparency Index, based on 11 quotes from the past year.
- Quotes, past year: 11
See full review & verified quotes →
#5 — Finnegan Buick Gmc
Grade: B · Score: 86/100 · Rosenberg, TX
Finnegan Buick Gmc earns a solid B on verified data — solid fundamentals.
- Quotes, past year: 4
See full review & verified quotes →
#6 — Texan Gmc Buick
Grade: B · Score: 85/100 · Humble, TX
Texan Gmc Buick grades a B: solid fundamentals.
- Quotes, past year: 7
See full review & verified quotes →
#7 — Tx Auto Group
Grade: C · Score: 76/100 · Houston, TX
Tx Auto Group grades a C at 76/100 across 5 quotes from the past year. Get a written OTD and compare before you commit.
- Quotes, past year: 5
See full review & verified quotes →
#8 — Demontrond Buick Gmc
Grade: C · Score: 71/100 · Houston, TX
Demontrond Buick Gmc grades a C at 71/100 across 5 quotes from the past year. Get a written OTD and compare before you commit.
- Quotes, past year: 5
See full review & verified quotes →
#9 — Zt Automotive
Grade: D · Score: 69/100 · Houston, TX
Zt Automotive grades a D at 69/100 across 5 quotes from the past year. Get a written OTD and compare before you commit.
- Quotes, past year: 5
See full review & verified quotes →
#10 — Classic Buick Gmc
Grade: D · Score: 60/100 · Houston, TX
Classic Buick Gmc grades a D at 60/100 across 7 quotes from the past year — the lowest on this list. Get a written OTD and compare before you commit.
- Quotes, past year: 7
See full review & verified quotes →
Limited Data
These GMC dealers in the Houston 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.
- Group 1 Automotive (Houston, TX) — based on 2 quotes from the past year. View dealer page
- Ron Carter Gmc (Alvin, TX) — based on 1 quote from the past year. View dealer page
- Classic Galveston Auto Group (Galveston, TX) — based on 3 quotes from the past year. View dealer page
- Gulf Coast Buick Gmc (Angleton, TX) — based on 2 quotes from the past year. View dealer page
- Demontrond Auto Group (Houston, TX) — based on 2 quotes from the past year. View dealer page
- Martin Gmc (Cleveland, TX) — 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 →
Houston GMC Dealer Rankings at a Glance
| # | Dealer | City | Grade | Score | Dealer Fees | Quoted Add-ons | Quotes, Past Year |
|---|---|---|---|---|---|---|---|
| 1 | Group 1 Gmc Southwest | Houston | A | 97 | — | — | 5 |
| 2 | Group 1 Buick Gmc South | Houston | A | 97 | — | — | 20 |
| 3 | Gay Buick Gmc | Dickinson | A | 96 | — | — | 8 |
| 4 | Group 1 Buick Gmc North | Houston | A | 95 | — | — | 11 |
| 5 | Finnegan Buick Gmc | Rosenberg | B | 86 | — | — | 4 |
| 6 | Texan Gmc Buick | Humble | B | 85 | — | — | 7 |
| 7 | Tx Auto Group | Houston | C | 76 | — | — | 5 |
| 8 | Demontrond Buick Gmc | Houston | C | 71 | — | — | 5 |
| 9 | Zt Automotive | Houston | D | 69 | — | — | 5 |
| 10 | Classic Buick Gmc | Houston | D | 60 | — | — | 7 |
For the live list, including dealers graded since this page last updated, see the live GMC dealer rankings near Houston 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
- 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 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.
- 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.
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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