Best GMC Dealerships in Colorado, Ranked by CarEdge Data
Key Takeaways
- Top 8 GMC dealers in Colorado, ranked using verified out-the-door quotes — not Google star ratings.
- Transwest Gmc Isuzu (Henderson) is the highest-graded GMC dealer in Colorado.
- Alpine Buick Gmc (Littleton) earns the lowest grade among ranked dealers — verified data shows below-average transparency across 26 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 across Colorado. 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 Colorado 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 1, 2026. CarEdge refreshes these rankings daily as new verified out-the-door quotes come in.
The Best GMC Dealers in Colorado
The best GMC dealer in Colorado by verified out-the-door price data is Transwest Gmc Isuzu (Henderson, CO): A grade, 100/100 across 6 verified quotes, with no dealer add-ons in any verified quote.
Close behind:
- Loveland Buick Gmc (Loveland), A grade, 91/100 across 5 verified quotes, with quotes 2.5% below the advertised price.
- Autonation Buick Gmc Park Meadows (Lone Tree), B grade, 88/100 across 4 verified quotes, with quotes 1.0% below the advertised price.
Full ranking, fees and add-on data for every graded dealer are below.
Top 8 GMC Dealers in Colorado
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 Isuzu
Grade: A · Score: 100/100 · Henderson, CO
Transwest Gmc Isuzu is the top-graded GMC dealer in Colorado by verified data — A grade, 100/100, based on 6 verified OTD quotes.
- Doc fee: $595 — below the CO average of $625
- Add-ons: None detected in verified quotes
- Listing accuracy: 4.0% below the advertised listing
- Verified quotes: 6
See full review & verified quotes →
#2 — 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 verified OTD quotes.
- Doc fee: $694 — above the CO average of $625
- Add-ons: 40% of quotes, avg $238
- Listing accuracy: 2.5% below the advertised listing
- Verified quotes: 5
See full review & verified quotes →
#3 — Autonation Buick Gmc Park Meadows
Grade: B · Score: 88/100 · Lone Tree, CO
Autonation Buick Gmc Park Meadows earns a solid B on verified data — solid fundamentals.
- Doc fee: $799 — well above the CO average of $625
- Add-ons: 25% of quotes, avg $375
- Listing accuracy: 1.0% below the advertised listing
- Verified quotes: 4
See full review & verified quotes →
#4 — Mike Maroone Gmc
Grade: B · Score: 80/100 · Boulder, CO
Mike Maroone Gmc grades a B: solid fundamentals, but quotes ran 2.0% over listing — ask for an itemized OTD.
- Doc fee: $847 — well above the CO average of $625
- Add-ons: 29% of quotes, avg $428
- Listing accuracy: 2.0% above the advertised listing
- Verified quotes: 7
See full review & verified quotes →
#5 — Autonation Buick Gmc West
Grade: B · Score: 80/100 · Golden, CO
A B for Autonation Buick Gmc West — solid fundamentals. The watch-out: add-ons show on 67% of quotes (avg $699).
- Doc fee: $799 — well above the CO average of $625
- Add-ons: 67% of quotes, avg $699
- Listing accuracy: 2.7% above the advertised listing
- Verified quotes: 6
See full review & verified quotes →
#6 — Shortline Buick Gmc
Grade: C · Score: 78/100 · Aurora, CO
Shortline Buick Gmc grades a C — add-ons appear on 67% of verified quotes, averaging $1,161. Ask for an itemized OTD before signing.
- Doc fee: $801 — well above the CO average of $625
- Add-ons: 67% of quotes, avg $1,161
- Listing accuracy: 0.7% below the advertised listing
- Verified quotes: 6
See full review & verified quotes →
#7 — O’Meara Gmc
Grade: C · Score: 74/100 · Denver, CO
O’Meara Gmc grades a C — add-ons appear on 100% of verified quotes, averaging $1,098. Ask for an itemized OTD before signing.
- Doc fee: $799 — well above the CO average of $625
- Add-ons: 100% of quotes, avg $1,098
- Listing accuracy: Quoted price matches the advertised listing
- Verified quotes: 4
See full review & verified quotes →
#8 — Alpine Buick Gmc
Grade: F · Score: 53/100 · Littleton, CO
Alpine Buick Gmc is the lowest-graded GMC dealer in Colorado 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: 39% of quotes, avg $357
- Listing accuracy: 1.5% below the advertised listing
- Verified quotes: 26
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 Colorado
Shopping a specific city? These metro-level rankings drill into GMC dealers near each major Colorado market:
Colorado GMC Dealer Rankings at a Glance
| # | Dealer | City | Grade | Score | Doc Fee | Add-Ons | Quotes |
|---|---|---|---|---|---|---|---|
| 1 | Transwest Gmc Isuzu | Henderson | A | 100 | $595 | $0 | 6 |
| 2 | Loveland Buick Gmc | Loveland | A | 91 | $694 | $238 | 5 |
| 3 | Autonation Buick Gmc Park Meadows | Lone Tree | B | 88 | $799 | $375 | 4 |
| 4 | Mike Maroone Gmc | Boulder | B | 80 | $847 | $428 | 7 |
| 5 | Autonation Buick Gmc West | Golden | B | 80 | $799 | $699 | 6 |
| 6 | Shortline Buick Gmc | Aurora | C | 78 | $801 | $1,161 | 6 |
| 7 | O’Meara Gmc | Denver | C | 74 | $799 | $1,098 | 4 |
| 8 | Alpine Buick Gmc | Littleton | F | 53 | — | $357 | 26 |
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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