The Best GMC Repair in Yaphank, NY

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

#1

All Diesel & Auto Inc.

4.8
(214 reviews)
Verified

A highly regarded, family-owned shop that is the area's premier specialist for diesel performance and repair. They are known for their deep technical expertise with Duramax engines and Allison transmissions, catering to both daily drivers and heavy-duty work trucks. Their reputation is built on transparency and solving complex problems other shops can't.

22 Jefryn Blvd E, Deer Park, NY 11729

Specialties & Features

Duramax diesel service
Allison transmission repair
Heavy-duty truck suspension

Business Information

Years in Business:12 years
Licensed:Yes
Insured:Yes
#2

GMC Medford

4.3
(187 reviews)
Verified

As an official GMC dealership, this is the primary source for factory-trained technicians, genuine GM parts, and the most current diagnostic software. They are the unequivocal best choice for warranty work, complex electronics, and maintaining the luxury features of Denali models. Their service department is equipped to handle all factory towing package maintenance and recalls.

2695 Route 112, Medford, NY 11763

Specialties & Features

Denali luxury features and electronics
EcoTec engine diagnostics
Towing package maintenance

Business Information

Years in Business:20 years
Licensed:Yes
Insured:Yes
#3

South Shore Truck & Auto Repair Inc.

4.7
(89 reviews)
Verified

A well-established local shop with a strong focus on trucks and SUVs. They receive consistent praise for their honest diagnostics and high-quality work on both gasoline and diesel engines. They are a reliable, full-service option for GMC owners needing everything from routine EcoTec service to 4WD system repairs and suspension work.

675 Montauk Hwy, Bayport, NY 11705

Specialties & Features

4WD and towing system service
EcoTec engine diagnostics
General GMC maintenance

Business Information

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

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

** The GMC repair market in the Yaphank area is characterized by a mix of national dealerships and highly specialized independent shops. Due to Yaphank's semi-rural location and proximity to major highways, there is a strong presence of truck-oriented service centers, but few are located directly within Yaphank's limited commercial zones. * **Average Quality:** The quality is bifurcated. General repair shops are abundant, but true *specialists* for complex systems like Duramax diesel or Denali electronics are limited to a handful of top-tier providers, as identified above. These specialists command higher prices due to their expertise and specialized equipment. * **Competition Level:** Competition is moderate but nuanced. Dealerships like GMC Medford compete on brand authority and warranty compliance, while independents like All Diesel & Auto compete on personalized service, deeper mechanical expertise, and often more competitive pricing for out-of-warranty vehicles. * **Typical Pricing:** Pricing follows a clear tiered structure. Dealerships are typically the most expensive option for labor and parts. Specialized independents are generally 15-30% less than dealership rates but may be priced higher than general mechanics due to their advanced capabilities. A standard oil change for a Denali may be $90-$120, while a complex Duramax injector replacement can run $2,500-$4,000+, depending on the shop. Consumers are advised to get multiple quotes for major repairs.

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 Yaphank regulations and climate