The Best GMC Repair in Mahopac, NY

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

#1

Mahopac Tire & Auto Center

4.8
(284 reviews)
Verified

A long-standing, family-owned full-service auto repair center widely regarded as the top general automotive shop in Mahopac. They have a reputation for honesty, quality workmanship, and handling complex diagnostics and repairs on domestic trucks and SUVs. Their team is experienced with the full range of GMC vehicles, from Sierra HD trucks with Duramax engines to Yukon Denalis.

40 US-6, Mahopac, NY 10541

Specialties & Features

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

Business Information

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

Putnam Diesel & Auto Repair

4.7
(132 reviews)
Verified

While located just outside Mahopac in the neighboring town of Carmel, this shop is the most specialized provider in the immediate area for diesel engine service. They are highly recommended by local contractors and truck owners for their deep expertise in Duramax diagnostics, performance, and repair, making them the premier choice for serious diesel-specific issues.

23 Old Route 6, Carmel, NY 10512

Specialties & Features

Duramax diesel service
Heavy-duty truck suspension
EcoTec engine diagnostics

Business Information

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

Brewster GM / Buick / Cadillac

4.3
(195 reviews)
Verified

As the closest authorized GMC dealership, Brewster GM is the definitive source for factory-trained technicians, genuine GM parts, and complex electronics/warranty work. They are the best choice for Denali luxury feature repairs, advanced module programming, and services that require proprietary GM diagnostic systems (GDS). Their Allison transmission specialists are certified by the manufacturer.

1790 Route 22, Brewster, NY 10509

Specialties & Features

Denali luxury features and electronics
Allison transmission repair
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 Mahopac

The GMC repair market in Mahopac is characterized by a few high-quality, independent shops that handle the majority of complex mechanical work, supplemented by a major dealership located a short drive away in Brewster. The competition is not saturated, but the existing providers are established and have strong local reputations. The average quality of service is high, as these businesses rely heavily on word-of-mouth and long-term customer relationships. **Typical Pricing:** Pricing is generally competitive but reflects the higher cost of expertise and parts for GMC trucks, especially for diesel and transmission work. Independent shops like Mahopac Tire and Putnam Diesel typically offer labor rates 20-30% lower than the dealership. However, for warranty or highly specialized electronic work, the dealership (Brewster GM) is often the only viable option, despite the premium cost. Customers should expect a significant investment for major repairs on Duramax engines or Allison transmissions, regardless of the provider chosen.

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 Mahopac regulations and climate