The Best GMC Repair in North Stonington, CT

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

#1

Westerly Auto & Truck Center

4.7
(180 reviews)
Verified

A highly reputable, full-service shop known for its expertise with both domestic and import vehicles, with a strong emphasis on trucks and SUVs. They are a go-to destination for complex diagnostics, engine work, and transmission services for the southeastern CT and southern RI region. Their technicians have extensive experience with GM platforms.

1 Auto Center Dr, Westerly, RI 02891 (Approx. 7 miles from North Stonington)

Specialties & Features

Duramax diesel service
Allison transmission repair
Heavy-duty truck suspension

Business Information

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

Mystic Transmissions & Auto Repair

4.8
(120 reviews)
Verified

While the name highlights transmissions, this shop provides comprehensive automotive care with a renowned specialty in transmission diagnostics, repair, and rebuilds. They are an authorized service provider for Allison Transmissions and are highly skilled with the modern 10-speed automatics found in newer GMCs. Their electronic diagnostics capability is a key strength.

9 Industrial Park Dr, Mystic, CT 06355 (Approx. 6 miles from North Stonington)

Specialties & Features

Allison transmission repair
10-speed transmission service
EcoTec engine diagnostics

Business Information

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

GMC of Mystic (New London County Motorcar)

4.3
(250 reviews)
Verified

As the closest authorized GMC dealership, this facility offers the highest level of factory-specific training, tools, and original parts. This is the premier choice for warranty work, complex electronics, Denali luxury feature repairs, and proprietary software updates that independent shops cannot access. Their service department is equipped to handle all GMC-specific systems.

10 Presidential Dr, Groton, CT 06340 (Approx. 9 miles from North Stonington)

Specialties & Features

Denali luxury features and electronics
Towing package maintenance
Factory-certified GMC service

Business Information

Years in Business:25 years
Licensed:Yes
Insured:Yes

Why These Are the Top GMC Repair Auto Repair Shops in North Stonington

** The GMC repair market serving North Stonington, CT, is characterized by a reliance on high-quality service providers in adjacent towns like Westerly, RI, and Mystic/Groton, CT. There is no dedicated GMC-only specialist located directly within North Stonington's town limits. The competition is healthy among the top-tier independent shops and the local dealership, creating a market where quality and specialization are necessary to succeed. **Average Quality:** The quality of service is generally high, with several shops boasting ASE Master Certified and GM-specific trained technicians. Customers expect and receive professional, knowledgeable service. **Competition Level:** Moderate. While there are numerous general repair shops, only a handful possess the specific expertise, diagnostic equipment, and reputation to be considered true "specialists" for complex GMC systems like Duramax diesel and Allison transmissions. **Typical Pricing:** Pricing is competitive with the regional average. Independent specialists like Westerly Auto and Mystic Transmissions typically offer rates 15-30% lower than the dealership (GMC of Mystic). The dealership's higher labor rate is offset by direct access to OEM parts, proprietary technical service bulletins, and factory-certified technicians. A complex diesel or transmission repair will represent a significant investment regardless of the provider chosen.

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 North Stonington regulations and climate