The Best GMC Repair in Greenlawn, NY

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

#1

All Transmissions & Auto Repair

4.8
(240 reviews)
Verified

A highly reputable, family-owned shop known for its deep technical expertise in complex drivetrain systems. They are the go-to local specialist for Allison transmission rebuilds and Duramax diesel performance diagnostics, often handling work that general shops turn away. Their technicians have specific training on heavy-duty truck systems.

46 Broadway, Greenlawn, NY 11740

Specialties & Features

Allison transmission repair
Duramax diesel service
4WD and towing system service

Business Information

Years in Business:30 years
Licensed:Yes
Insured:Yes
#2

Greenlawn Auto Care

4.7
(180 reviews)
Verified

A well-established, trusted local shop with a strong focus on comprehensive diagnostics and electrical systems. They receive consistent praise for their honest service and ability to troubleshoot complex issues on modern GMC vehicles, including EcoTec engine problems and Denali electronics.

45 Railroad St, Greenlawn, NY 11740

Specialties & Features

EcoTec engine diagnostics
Denali luxury features and electronics
towing package maintenance

Business Information

Years in Business:25 years
Licensed:Yes
Insured:Yes
#3

Smithtown GMC (A Division of Competition Automotive Group)

4.4
(280 reviews)
Verified

As the authorized GMC dealership serving the Greenlawn area, Smithtown GMC offers factory-trained technicians, genuine GM parts, and direct access to the latest technical service bulletins and programming. This is the premier choice for warranty work, complex module programming on Denali models, and specialized service on newer 10-speed transmissions.

330 E Main St, Smithtown, NY 11787

Specialties & Features

Denali luxury features and electronics
10-speed transmission service
factory towing package maintenance

Business Information

Years in Business:40 years
Licensed:Yes
Insured:Yes

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

** The GMC repair market in Greenlawn is characterized by high-quality, independent shops that have built long-standing reputations, complemented by a major dealership presence just outside the immediate town limits. The competition is strong, driving a focus on customer service and specialized expertise. * **Average Quality:** The quality of service is generally high. Independent shops compete on personalized service, lower labor rates, and deep mechanical specialization (e.g., transmissions, diesel), while the dealership provides the assurance of factory-specific training and equipment. * **Competition Level:** Moderate to High. Customers have clear choices between specialized independents and the factory-authorized dealer. Shops differentiate themselves by cultivating niches—one in transmissions/diesel, another in general repair/electronics, and the dealer in OEM-specific services. * **Typical Pricing:** Pricing is competitive for the Long Island region. Independent shops typically charge $120-$150/hour, providing significant savings over the dealership rate, which can exceed $175/hour. However, for highly complex electronic or transmission issues, the specialized independents may command rates closer to the dealership due to their unique expertise.

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 Greenlawn regulations and climate