The Best GMC Repair in Slate Hill, NY

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

#1

J & M Diesel & Auto Repair

4.8
(180 reviews)
Verified

A family-owned and operated business renowned for its expertise in diesel performance and repair. They are the go-to shop in the region for complex Duramax engine diagnostics, performance tuning, and Allison transmission service. They cater heavily to owners of heavy-duty GMC Sierra trucks used for towing and farming.

455 Route 6, Mahopac, NY 10541

Specialties & Features

Duramax diesel service
Allison transmission repair
Heavy-duty truck suspension

Business Information

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

Middletown Automotive & Truck Repair

4.6
(220 reviews)
Verified

A well-established, full-service shop with a strong reputation for honesty and technical competency. They have multiple ASE-certified technicians with specific experience in GM platforms. They offer comprehensive services from EcoTec engine diagnostics on smaller SUVs to 4WD system service and towing package maintenance on full-size trucks.

24 North St, Middletown, NY 10940

Specialties & Features

EcoTec engine diagnostics
4WD and towing system service
General GMC mechanical repair

Business Information

Years in Business:18 years
Licensed:Yes
Insured:Yes
#3

German & American Auto Werkes

4.7
(95 reviews)
Verified

While the name suggests a European focus, this shop has master technicians with deep expertise across all brands, including GMC. They are particularly praised for their diagnostic capabilities for complex electrical and electronic systems, making them an excellent choice for troubleshooting Denali luxury features, infotainment systems, and advanced driver-assistance features.

560 Route 211 East, Middletown, NY 10941

Specialties & Features

Denali luxury features and electronics
Advanced diagnostics
General GMC service

Business Information

Years in Business:9 years
Licensed:Yes
Insured:Yes

Why These Are the Top GMC Repair Auto Repair Shops in Slate Hill

** The GMC repair market serving Slate Hill, NY is characterized by a reliance on reputable independent shops in neighboring commercial hubs like Middletown and Mahopac, rather than a high density of specialists within the hamlet itself. The competition is moderate, with a clear distinction between general repair shops and a few highly-specialized providers like J & M Diesel. **Average Quality:** The quality is generally high, with several shops boasting long-term reputations and veteran technicians. Customers expect and receive personalized service. **Competition Level:** The market is not oversaturated. For standard maintenance, there are several options, but for specialized diesel or complex electronic work, the field narrows significantly, giving top-tier specialists strong pricing power. **Typical Pricing:** Labor rates are competitive for the Hudson Valley region, typically ranging from **$120 - $165 per hour**. Specialized diesel and transmission work commands the higher end of this scale. A Duramax injector replacement job can easily exceed $3,000, while an Allison transmission service is typically $400-$600. Diagnostics for electrical issues are often charged at a premium flat rate.

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 Slate Hill regulations and climate