Best GMC Dealerships in Denver, Ranked by CarEdge Data

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

9 GMC dealers in Denver 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 Denver?

The best GMC dealer in Denver by verified out-the-door price data is Transwest Gmc (Henderson, CO): A grade, 100/100 across 6 quotes from the past year, with no quoted add-ons in its 6 quotes from the past year.

Close behind:

2. Johnson Auto Plaza (Brighton), A grade, 98/100 across 13 quotes from the past year, with $599 in dealer fees, under the CO median of $741.
3. Autonation Buick Gmc West (Golden), A grade, 96/100 across 6 quotes from the past year, with no quoted add-ons in its 6 quotes from the past year.

Best for:

• Lowest dealer fees: Transwest Gmc (Henderson), $595, against the CO median of $741.
• No quoted add-ons: Transwest Gmc (Henderson), none in its 6 quotes from the past year.
• Most quotes, past year: Alpine Buick Gmc (Littleton), 26 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 9 GMC Dealers in Denver

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

#1 — Transwest Gmc

Grade: A · Score: 100/100 · Henderson, CO

Transwest Gmc is the top-graded GMC dealer in the Denver metro by verified data — A grade, 100/100, based on 6 quotes from the past year.

• Dealer fees: $595 — below the CO median of $741
• Quoted add-ons: None in 6 quotes from the past year
• Quotes, past year: 6

See full review & verified quotes →

#2 — Johnson Auto Plaza

Grade: A · Score: 98/100 · Brighton, CO

Johnson Auto Plaza put quoted add-ons on just 15% of its quotes from the past year — light for an A-grade dealer.

• Dealer fees: $599 — below the CO median of $741
• Quoted add-ons: On 2 of 13 quotes from the past year (15%)
• Quotes, past year: 13

See full review & verified quotes →

#3 — Autonation Buick Gmc West

Grade: A · Score: 96/100 · Golden, CO

Not one of Autonation Buick Gmc West’s 6 quotes from the past year carried a quoted add-on — a clean record at the A grade.

• Dealer fees: $799 — above the CO median of $741
• Quoted add-ons: None in 6 quotes from the past year
• Quotes, past year: 6

See full review & verified quotes →

#4 — Autonation Buick Gmc Park Meadows

Grade: A · Score: 96/100 · Lone Tree, CO

Autonation Buick Gmc Park Meadows keeps the F&I office out of it: no quoted add-ons in its 5 quotes from the past year.

• Dealer fees: $799 — above the CO median of $741
• Quoted add-ons: None in 5 quotes from the past year
• Quotes, past year: 5

See full review & verified quotes →

#5 — Shortline Buick Gmc

Grade: A · Score: 92/100 · Aurora, CO

Shortline Buick Gmc put no quoted add-ons on any of its 4 quotes from the past year — rare for an A-grade GMC dealer.

• Dealer fees: $789 — above the CO median of $741
• Quoted add-ons: None in 4 quotes from the past year
• Quotes, past year: 4

See full review & verified quotes →

#6 — Mike Maroone Gmc

Grade: A · Score: 91/100 · Boulder, CO

Mike Maroone Gmc earns an A-grade on the CarEdge Dealer Transparency Index, based on 6 quotes from the past year.

• Dealer fees: $795 — above the CO median of $741
• Quoted add-ons: On 2 of 6 quotes from the past year (33%)
• Quotes, past year: 6

See full review & verified quotes →

#7 — Loveland Buick Gmc

Grade: A · Score: 91/100 · Loveland, CO

Loveland Buick Gmc earns an A-grade on the CarEdge Dealer Transparency Index, based on 5 quotes from the past year.

• Dealer fees: $694 — below the CO median of $741
• Quoted add-ons: On 2 of 5 quotes from the past year (40%)
• Quotes, past year: 5

See full review & verified quotes →

#8 — Alpine Buick Gmc

Grade: B · Score: 85/100 · Littleton, CO

Alpine Buick Gmc holds the B grade across 26 quotes from the past year — a substantial sample size.

• Dealer fees: $770 — above the CO median of $741
• Quoted add-ons: On 7 of 26 quotes from the past year (27%)
• Quotes, past year: 26

See full review & verified quotes →

#9 — O’meara Gmc

Grade: B · Score: 83/100 · Denver, CO

Quoted add-ons appear on 80% of O’meara Gmc’s quotes from the past year — the highest rate on this list. Ask for an itemized OTD before signing.

• Dealer fees: $799 — above the CO median of $741
• Quoted add-ons: On 4 of 5 quotes from the past year (80%)
• Quotes, past year: 5

See full review & verified quotes →

Limited Data

These GMC dealers in the Denver 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.

• Transwest Automotive Group (Denver, CO) — based on 1 quote from the past year. View dealer page
• Weld County Garage Gmc (Greeley, CO) — based on 1 quote from the past year. View dealer page
• Hm Brown & Associates (Centennial, CO) — based on 2 quotes from the past year. View dealer page
• Yoder Fleet (Greeley, CO) — based on 1 quote from the past year. View dealer page
• Castle Rock GMC (Castle Rock, CO) — based on 2 quotes from the past year. View dealer page
• Valley Auto Group (Longmont, CO) — 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 →

Denver GMC Dealer Rankings at a Glance

#	Dealer	City	Grade	Score	Dealer Fees	Quoted Add-ons	Quotes, Past Year
1	Transwest Gmc	Henderson	A	100	$595	None	6
2	Johnson Auto Plaza	Brighton	A	98	$599	15%	13
3	Autonation Buick Gmc West	Golden	A	96	$799	None	6
4	Autonation Buick Gmc Park Meadows	Lone Tree	A	96	$799	None	5
5	Shortline Buick Gmc	Aurora	A	92	$789	None	4
6	Mike Maroone Gmc	Boulder	A	91	$795	33%	6
7	Loveland Buick Gmc	Loveland	A	91	$694	40%	5
8	Alpine Buick Gmc	Littleton	B	85	$770	27%	26
9	O’meara Gmc	Denver	B	83	$799	80%	5

For the live list, including dealers graded since this page last updated, see the live GMC dealer rankings near Denver 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.