Top 3 GMC Repair Shops in Colchester

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

#1

Vermont Auto & Diesel

4.8
(180 reviews)
Verified

A highly respected, family-owned shop known for its deep technical expertise with both domestic and import vehicles. They have a dedicated diesel and drivetrain specialist on staff and are widely regarded as one of the top shops in the region for complex diagnostics and repair, particularly for Duramax diesel engines and Allison transmissions. They serve a large clientele with heavy-duty trucks and are equipped for 4WD and towing system service.

346 Commerce St, Williston, VT 05495

Specialties & Features

Duramax diesel service
Allison transmission repair
Heavy-duty truck suspension

Business Information

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

Harnish Gas & Diesel, Inc.

4.7
(90 reviews)
Verified

A specialized shop with a formidable reputation specifically for diesel engine performance, repair, and maintenance. They are the go-to experts for Duramax owners requiring anything from routine maintenance to major performance upgrades and engine overhauls. Their focus on diesel systems makes them exceptionally qualified for the most demanding GHD (GMC Heavy Duty) and towing-related diagnostics and repairs.

52 Creek Farm Rd, Colchester, VT 05446

Specialties & Features

Duramax diesel service
performance
EcoTec engine diagnostics
Towing package maintenance

Business Information

Years in Business:10 years
Licensed:Yes
Insured:Yes
#3

Colchester Auto & Truck Repair

4.5
(120 reviews)
Verified

A well-established, local full-service shop with a strong presence in the Colchester community. They offer a comprehensive range of services and have experienced technicians capable of handling GMC-specific issues, including 4WD systems, general transmission work, and suspension services on light and heavy-duty trucks. They are a reliable choice for routine and complex repairs on GMC vehicles.

877 Roosevelt Hwy, Colchester, VT 05446

Specialties & Features

4WD and towing system service
Transmission repair
General GMC service
diagnostics

Business Information

Years in Business:20 years
Licensed:Yes
Insured:Yes

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

** The GMC repair market in and serving Colchester, VT, is characterized by high-quality, independent specialists rather than a high volume of competitors. As a suburban area with significant commercial and recreational towing needs, there is strong demand for expertise in diesel engines, transmissions, and 4WD systems. The market is not saturated, but the existing providers are established, reputable, and technically proficient. **Average Quality:** The quality of specialized service is generally high, with several shops boasting over 15 years of longevity and consistently high customer ratings (4.5+ stars). Expertise is the primary differentiator. **Competition Level:** Moderate. While there are several general auto repair shops, true specialists for complex GMC systems like Duramax and Allison are limited to a handful of highly-regarded businesses. This lack of saturation allows these specialists to maintain strong business health. **Typical Pricing:** Pricing is competitive with regional norms but reflects the high level of expertise required. Expect labor rates in the **$130 - $170/hour** range for specialized diesel and transmission work. General mechanical labor may be slightly lower. Parts for Denali electronics and heavy-duty components command a premium. Customers report receiving good value for the expertise provided, justifying the cost.

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 Colchester regulations and climate