Best GMC Dealerships in Stockton, Ranked by CarEdge Data

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

6 GMC dealers in Stockton cleared the data threshold this quarter. Here’s how they rank.

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).

Top 6 GMC Dealers in Stockton

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

#1 — Gmc Of Vacaville

Grade: A · Score: 95/100 · Vacaville, CA

Gmc Of Vacaville is the top-graded GMC dealer in the Stockton metro by verified data — A grade, 95/100, based on 4 verified OTD quotes.

• Doc fee: $85 — well below the CA average of $125
• Add-ons: None detected in verified quotes
• Listing accuracy: 1.5% below the advertised listing
• Verified quotes: 4

See full review & verified quotes →

#2 — Elk Grove Buick Gmc

Grade: A · Score: 94/100 · Elk Grove, CA

Elk Grove Buick Gmc keeps add-ons on just 20% of verified quotes — light for an A-grade dealer.

• Doc fee: $85 — well below the CA average of $125
• Add-ons: 20% of quotes, avg $278
• Listing accuracy: 1.3% below the advertised listing
• Verified quotes: 5

See full review & verified quotes →

#3 — Mataga Buick Gmc

Grade: B · Score: 87/100 · Stockton, CA

Mataga Buick Gmc earns a solid B on verified data — a doc fee at or below the CA average. The one watch-out: add-ons show on 57% of quotes (avg $1,153).

• Doc fee: $121 — below the CA average of $125
• Add-ons: 57% of quotes, avg $1,153
• Listing accuracy: 1.2% below the advertised listing
• Verified quotes: 7

See full review & verified quotes →

#4 — Lehmer’s Concord Gmc

Grade: B · Score: 84/100 · Concord, CA

Lehmer’s Concord Gmc grades a B: a doc fee at or below the CA average, but add-ons show on 71% of quotes (avg $796) — ask for an itemized OTD.

• Doc fee: $85 — well below the CA average of $125
• Add-ons: 71% of quotes, avg $796
• Listing accuracy: 2.1% above the advertised listing
• Verified quotes: 7

See full review & verified quotes →

#5 — Fremont Buick Gmc

Grade: F · Score: 59/100 · Fremont, CA

Fremont Buick Gmc is the lowest-graded GMC dealer in the Stockton metro by verified data. The doc fee runs $1141 — well above the CA average of $125. Bring data and be ready to walk.

• Doc fee: $1141 — well above the CA average of $125
• Add-ons: 17% of quotes, avg $333
• Listing accuracy: 1.0% below the advertised listing
• Verified quotes: 6

See full review & verified quotes →

#6 — Folsom Buick Gmc

Grade: F · Score: 50/100 · Folsom, CA

Folsom Buick Gmc is the lowest-graded GMC dealer in the Stockton metro by verified data. Verified quotes show a pattern of below-average transparency. Bring data and be ready to walk.

• Doc fee: Not available
• Add-ons: 40% of quotes, avg $1,027
• Listing accuracy: 4.4% below the advertised listing
• Verified quotes: 5

See full review & verified quotes →

Limited Data

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

• Alfred Matthews Gmc (Modesto, CA) — based on 1 verified OTD quote. View dealer page
• Dublin Buick Gmc (Pleasanton, CA) — based on 3 verified OTD quotes. View dealer page
• Bonander Gmc (Turlock, CA) — based on 1 verified OTD quote. View dealer page
• Thompson Buick Gmc (Patterson, CA) — based on 1 verified OTD quote. View dealer page

Stockton GMC Dealer Rankings at a Glance

#	Dealer	City	Grade	Score	Doc Fee	Add-Ons	Quotes
1	Gmc Of Vacaville	Vacaville	A	95	$85	$0	4
2	Elk Grove Buick Gmc	Elk Grove	A	94	$85	$278	5
3	Mataga Buick Gmc	Stockton	B	87	$121	$1,153	7
4	Lehmer’s Concord Gmc	Concord	B	84	$85	$796	7
5	Fremont Buick Gmc	Fremont	F	59	$1141	$333	6
6	Folsom Buick Gmc	Folsom	F	50	—	$1,027	5

These rankings are a quarterly snapshot. For the continuously updated list — including dealers rated since this article was published — see the live GMC dealer rankings near Stockton on the CarEdge Dealer Transparency Index.

Compare GMC Dealers in Other Metros

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

• Best GMC Dealerships in Phoenix
• Best GMC Dealerships in Houston
• Best GMC Dealerships in Dallas-Fort Worth
• Best GMC Dealerships in Los Angeles
• Best GMC Dealerships in Chicago
• Best GMC Dealerships in Atlanta
• Best GMC Dealerships in Washington DC
• Best GMC Dealerships in Seattle
• Best GMC Dealerships in Denver
• Best GMC Dealerships in New York City
• Best GMC Dealerships in Philadelphia
• Best GMC Dealerships in Boston
• Best GMC Dealerships in Tampa
• Best GMC Dealerships in Austin
• Best GMC Dealerships in Orlando
• Best GMC Dealerships in Sacramento
• Best GMC Dealerships in Baltimore
• Best GMC Dealerships in Milwaukee
• Best GMC Dealerships in Providence
• Best GMC Dealerships in Allentown
• Best GMC Dealerships in Hartford
• Best GMC Dealerships in Riverside-San Bernardino
• Best GMC Dealerships in Sarasota
• Best GMC Dealerships in Youngstown
• Best GMC Dealerships in Rockford
• Best GMC Dealerships in Killeen

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 listing. Dealers with a gap between advertised price and final OTD aren’t being straight with you. Don’t negotiate off the listing number.
4. 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. Data updated quarterly. Last updated: Q3 2026.