The Best GMC Repair in Big Flats, NY

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

#1

Mathews GMC

4.5
(180 reviews)
Verified

As the local authorized GMC dealership, Mathews is the primary destination for factory-trained service, genuine GM parts, and complex warranty work. Their technicians receive direct training from GM, making them the most equipped for the latest Denali electronics, 10-speed transmissions, and EcoTec engine diagnostics.

2490 Corning Rd, Elmira, NY 14903

Specialties & Features

Denali luxury features
Allison/10-speed transmission service
EcoTec engine diagnostics

Business Information

Years in Business:25 years
Licensed:Yes
Insured:Yes
#2

All Pro Automotive & Diesel

4.7
(95 reviews)
Verified

A highly-rated independent shop with a strong reputation for diesel and drivetrain expertise. They are a top choice for owners of heavy-duty GMC trucks (Sierra 2500/3500) requiring specialized Duramax service, Allison transmission maintenance, and suspension work for towing and plowing.

216 Daniel Zenker Dr, Horseheads, NY 14845

Specialties & Features

Duramax diesel service
Heavy-duty truck suspension
Towing package maintenance

Business Information

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

Mighty Auto & Truck Repair

4.4
(70 reviews)
Verified

A well-established, full-service shop known for its experienced technicians and comprehensive approach to both light and heavy-duty vehicles. They are a reliable alternative for general GMC maintenance, 4WD system service, transmission work, and diagnosing complex mechanical and electronic issues.

139 E Franklin St, Horseheads, NY 14845

Specialties & Features

4WD system service
Transmission repair
General GMC diagnostics
repair

Business Information

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

Why These Are the Top GMC Repair Auto Repair Shops in Big Flats

** The GMC repair market serving Big Flats, NY, is characterized by a clear hierarchy. The authorized dealership, **Mathews GMC**, holds the dominant position for factory-specific repairs, warranty work, and the latest model-year technology. This comes with the expected dealership-level labor rates, which are typically the highest in the area. The independent shop market is robust and competitive, with several high-quality options located in the immediate vicinities of Horseheads and Elmira. Shops like **All Pro Automotive & Diesel** have successfully carved out a niche by offering deep technical expertise in high-demand areas like Duramax and Allison systems, often at more competitive rates than the dealership. **Mighty Auto & Truck Repair** represents the strong, generalist repair shop that can competently handle a wide range of GMC issues. Overall, GMC owners in Big Flats have access to excellent service options. Pricing is competitive, with independent shops offering significant savings for out-of-warranty vehicles. The market is not oversaturated, but the presence of several highly-rated independents ensures that quality and customer service remain high to retain business. For specialized diesel and transmission work, the independents are often the preferred choice, while the dealership remains essential for complex electronics and warranty-covered services.

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 Big Flats regulations and climate