The Best GMC Repair in Port Jefferson Station, NY

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

#1

Smithtown GMC | Buick (Primary Dealership)

4.5
(280 reviews)
Verified

As the authorized GMC dealership for the area, this facility is the benchmark for factory-specific service. Their technicians receive direct training and have access to the latest technical service bulletins, specialized tools, and OEM parts for all GMC models, from the Sierra to the Yukon Denali.

320 E Main St, Smithtown, NY 11787

Specialties & Features

Duramax diesel service
Allison transmission repair
Denali electronics
luxury features

Business Information

Years in Business:20 years
Licensed:Yes
Insured:Yes
#2

All 4 Wheel Drive & Auto Repair

4.7
(150 reviews)
Verified

This highly-rated independent shop has built a formidable reputation for expertise in 4WD systems, suspension, and diesel engine service. They are a go-to for GMC owners with HD trucks used for towing and off-road applications. Reviewers frequently praise their diagnostic accuracy and work on complex drivetrain issues.

522-1 Rte 111, Hauppauge, NY 11788

Specialties & Features

4WD and towing system service
Heavy-duty truck suspension
Duramax diesel service

Business Information

Years in Business:15 years
Licensed:Yes
Insured:Yes
#3

A-1 Transmission Center

4.6
(120 reviews)
Verified

A specialist shop focused exclusively on transmission repair and service. They are recognized as local experts for the robust Allison transmissions found in GMC HD trucks, as well as the newer 10-speed models. Their focused practice means they have extensive experience in rebuilds, diagnostics, and maintenance specific to these complex units.

501-5 Rte 111, Hauppauge, NY 11788

Specialties & Features

Allison transmission repair
10-speed transmission service
Towing package maintenance

Business Information

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

Why These Are the Top GMC Repair Auto Repair Shops in Port Jefferson Station

** The GMC repair market in and around Port Jefferson Station is characterized by a mix of one primary dealership and a cluster of highly competent independent specialty shops, many of which are located in the adjacent industrial hub of Hauppauge. The **average quality** is high, as the Long Island market demands expertise for a vehicle fleet that includes a significant number of trucks and SUVs used for commercial and recreational purposes. **Competition level** is moderate but specialized. While there are many general mechanics, shops that possess deep, proven expertise in areas like Duramax diesel or Allison transmissions are fewer and command strong, loyal customer bases. This specialization allows them to compete effectively with the dealership on both price and personalized service. **Typical pricing** follows a clear tiered structure: * **Dealership (Smithtown GMC):** Highest labor rates, but with the assurance of OEM parts and factory-trained technicians. Best for warranty work, complex electronics, and the latest models. * **Specialty Independents (All 4 Wheel Drive, A-1 Transmission):** Typically 15-30% lower labor rates than the dealership. They often use high-quality aftermarket or rebuilt components, offering significant cost savings for out-of-warranty vehicles and specialized drivetrain work. For a GMC owner, the choice often comes down to the specific repair needed: the dealership for comprehensive, factory-perfect service, and a trusted independent specialist for focused mechanical expertise on drivetrain, suspension, or transmission components.

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 Port Jefferson Station regulations and climate