The Best GMC Repair in Mongaup Valley, NY

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

#1

Bethel Garage & Truck Repair

4.7
(180 reviews)
Verified

A long-standing, family-owned business known for its deep expertise in both light and heavy-duty truck repair. They are the go-to shop in Sullivan County for complex diesel and transmission work, with a reputation for tackling jobs that dealerships turn away. Their technicians have extensive experience with American trucks, particularly GM products.

3454 NY-55, Swan Lake, NY 12783 (Approx. 10 miles from Mongaup Valley)

Specialties & Features

Duramax diesel service
Allison transmission repair
Heavy-duty truck suspension

Business Information

Years in Business:40 years
Licensed:Yes
Insured:Yes
#2

C & R Automotive

4.8
(150 reviews)
Verified

Highly regarded for their diagnostic capabilities and honest service. While they service all makes and models, they have developed a strong niche with GM vehicles, including the sophisticated electronics and powertrains found in Denali models and newer EcoTec engines. Customers frequently praise their transparency and technical knowledge.

4469 NY-42, Fallsburg, NY 12733 (Approx. 15 miles from Mongaup Valley)

Specialties & Features

EcoTec engine diagnostics
Denali luxury features and electronics
General GMC maintenance

Business Information

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

M & M Transmission & Auto Repair

4.6
(90 reviews)
Verified

As the name implies, this shop specializes in transmission systems, making them a prime choice for the complex Allison and newer GM 10-speed transmissions. They also offer full-service automotive repair and have specific experience with the 4WD systems and towing components critical to GMC truck and SUV owners.

221 Sullivan St, Wurtsboro, NY 12790 (Approx. 20 miles from Mongaup Valley)

Specialties & Features

Allison transmission repair
4WD and towing system service
Towing package maintenance

Business Information

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

Why These Are the Top GMC Repair Auto Repair Shops in Mongaup Valley

** The GMC repair market serving Mongaup Valley is characterized by a handful of highly skilled, independent shops rather than a high volume of options. Due to the rural nature of Sullivan County, residents are accustomed to driving 10-20 miles for specialized automotive services. The competition is not dense, but the quality of the top-tier providers is exceptionally high. These shops have built their reputations over decades through word-of-mouth and consistently strong reviews, often outperforming the more distant dealerships in Catskill or Middletown in terms of personalized service and value. Typical pricing is competitive for the region, generally lower than dealership rates but reflective of the high level of expertise required for complex GMC systems like Duramax diesel and Allison transmissions. Customers can expect fair but premium pricing for specialized diagnostics and repairs, with general maintenance being more moderately priced. For Mongaup Valley GMC owners, the key is choosing the specialist whose core competency (diesel, electronics, or transmission) best matches their vehicle's specific need.

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 Mongaup Valley regulations and climate