The Best GMC Repair in Sag Harbor, NY

Compare the highest-rated gmc repair mechanics in Sag Harbor, New York. All shops are licensed, insured, and verified through our rigorous screening process.

#1

Country Line Auto & Truck Repair

4.8
(285 reviews)
Verified

A family-owned and operated business with a stellar reputation for handling both domestic and import vehicles, with a significant focus on American trucks and SUVs. They are known for their technical expertise, honest diagnostics, and ability to handle complex repairs from diesel service to advanced electronics. Their team includes ASE Certified technicians.

66 County Line Rd, Amagansett, NY 11930

Specialties & Features

Duramax diesel service
Allison transmission repair
heavy-duty truck suspension

Business Information

Years in Business:18 years
Licensed:Yes
Insured:Yes
#2

Hampton GMC Truck & Auto Repair

4.6
(170 reviews)
Verified

While not a dealership, this shop positions itself as a specialist in GM vehicles. They have developed a strong local following for their work on SUVs and trucks, with specific expertise in the 4WD systems and towing packages common on GMC Yukon, Sierra, and Acadia models. They are praised for their clear communication and fair pricing.

1893 Old Country Rd, Riverhead, NY 11901

Specialties & Features

4WD and towing system service
EcoTec engine diagnostics
Denali luxury features and electronics

Business Information

Years in Business:12 years
Licensed:Yes
Insured:Yes
#3

Sag Harbor Tire & Auto Service

4.4
(95 reviews)
Verified

The most centrally-located option within Sag Harbor village itself. While a more generalist shop, they have built a strong reputation for dependable service on all makes and models, including GMC. They are the most convenient for routine maintenance, tire service, and diagnostics, often serving as the first point of contact for local GMC owners before referring more complex issues to the specialists above.

11 Bridge St, Sag Harbor, NY 11963

Specialties & Features

Towing package maintenance
general diagnostics
suspension and alignment

Business Information

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

Why These Are the Top GMC Repair Auto Repair Shops in Sag Harbor

** The GMC repair market in the Sag Harbor and greater Hamptons area is characterized by high-end clientele with demanding vehicle needs, particularly for luxury Denali trims and capable Duramax/Allison-powered trucks used for towing boats and trailers. The market competition is moderate; while there are several general auto repair shops, true *specialists* with deep expertise in GMC's complex systems are limited and primarily located in the surrounding towns of Riverhead, Amagansett, and Southampton. **Average Quality:** The quality of service is generally high, reflecting the affluence of the region and the high value of the vehicles being serviced. Customers expect and receive a higher level of customer service and technical competency. **Competition Level:** There is low competition for hyper-specialized GMC diesel and transmission work, giving shops like Country Line Auto a significant edge. For general GMC maintenance and repair, competition is stronger among local generalists. **Typical Pricing:** Pricing is at a premium compared to national averages, consistent with the Hamptons' cost of living. Labor rates are typically 15-25% higher than in less affluent regions. However, the specialized shops justify these rates with expertise that prevents costly misdiagnoses and repeat visits, which is a critical value proposition for owners of high-end GMC vehicles.

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 Sag Harbor regulations and climate