The Best GMC Repair in Dacono, CO

Compare the highest-rated gmc repair mechanics in Dacono, Colorado. All shops are licensed, insured, and verified through our rigorous screening process.

#1

S & S Automotive and Diesel

4.8
(280 reviews)
Verified

A family-owned and operated shop renowned for its expertise in diesel performance and repair. They are a top-tier independent shop that attracts customers from across the Front Range for complex diagnostics and repair, particularly on Duramax engines and Allison transmissions. They are known for their honest assessments and high-quality workmanship.

1401 Sherman St, Longmont, CO 80501

Specialties & Features

Duramax diesel service
Allison transmission repair
Heavy-duty truck suspension

Business Information

Years in Business:15 years
Licensed:Yes
Insured:Yes
#2

The Diesel Guy

4.9
(150 reviews)
Verified

As the name implies, this provider is a pure specialist focused exclusively on diesel engines and related systems. They have built an exceptional reputation for diagnostic precision and are a go-to for Duramax performance tuning, emissions system repair, and transmission service. Their smaller, specialist model ensures focused expertise.

200 Park St, Frederick, CO 80530

Specialties & Features

Duramax diesel service
EcoTec engine diagnostics
Towing package maintenance

Business Information

Years in Business:8 years
Licensed:Yes
Insured:Yes
#3

A-1 Automotive & Truck Repair

4.7
(200 reviews)
Verified

A well-established, full-service shop with a strong reputation for handling both domestic trucks and SUVs. They offer a comprehensive range of services from routine maintenance to major engine and drivetrain repairs. They are a reliable choice for general GMC service, including 4WD systems, suspension work, and electronic diagnostics common in Denali models.

6781 N County Line Rd, Longmont, CO 80504

Specialties & Features

4WD and towing system service
Transmission repair
Denali luxury features and electronics

Business Information

Years in Business:12 years
Licensed:Yes
Insured:Yes

Why These Are the Top GMC Repair Auto Repair Shops in Dacono

** The GMC repair market in the Dacono area is characterized by a strong presence of high-quality independent specialists, particularly for diesel and heavy-duty truck services. Due to Dacono's proximity to the major I-25 corridor and its role in regional industry and commerce, there is significant demand for expert truck repair. The market is competitive, with several shops boasting Google ratings above 4.5 stars, indicating a high average quality of service. Consumers have a clear choice between pure diesel specialists (like The Diesel Guy) and broader truck service centers (like S&S and A-1). There is no dedicated GMC/Cadillac dealership within Dacono itself, which has fostered a robust ecosystem of independent providers. Typical pricing is competitive with the broader Front Range, with general maintenance starting in the $100-$150/hr labor range and specialized diesel/transmission work commanding higher rates. Customers consistently report that expertise and trustworthiness are valued over the lowest price.

High Ratings

4.7+ star average from verified customer reviews

Fully Licensed

All shops are properly licensed and insured

Proven Experience

10+ years average experience in the industry

Local Experts

Familiar with Dacono regulations and climate