The Best GMC Repair in Ulster, PA

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

#1

Ulrich's Service Center

4.6
(120 reviews)
Verified

A long-standing, family-owned full-service garage known for its honest diagnostics and skilled mechanics. While not an exclusive GMC specialist, they have a strong reputation for handling complex engine and drivetrain work on domestic trucks, including the Duramax and Allison systems common in GMC vehicles. They are a trusted local name for both routine maintenance and major repairs.

324 Main St, Ulster, PA 18850

Specialties & Features

Diesel engine service
Transmission repair
4WD diagnostics

Business Information

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

Troy Sales & Service

4.4
(85 reviews)
Verified

Located just a short drive from Ulster in Troy, this provider is a well-known hub for truck owners. They have specific expertise in diesel performance and repair, making them a go-to for Duramax engine work. Their technicians are experienced with the heavy-duty demands of GMC 2500/3500 series trucks, including suspension, towing systems, and transmission service.

51 Redington Ave, Troy, PA 16947

Specialties & Features

Duramax diesel service
Heavy-duty truck suspension
Towing package maintenance

Business Information

Years in Business:15 years
Licensed:Yes
Insured:Yes
#3

Keystone Diesel & Auto

4.7
(150 reviews)
Verified

Based in the nearby county seat of Towanda, this is the most specialized shop on the list for diesel and heavy-duty truck service. They are the premier choice for complex Duramax diagnostics, Allison transmission rebuilds, and performance towing system upgrades. Their investment in modern diagnostic tools makes them particularly adept at handling EcoTec engine codes and Denali electronics.

101 York Ave, Towanda, PA 18848

Specialties & Features

Duramax diesel service
Allison transmission repair
EcoTec engine diagnostics

Business Information

Years in Business:10 years
Licensed:Yes
Insured:Yes

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

** The GMC repair market in Ulster, Pennsylvania, and the greater Bradford County area is characterized by a handful of highly competent, independent shops rather than a high volume of dealerships or national chains. The rural nature of the region means these businesses are accustomed to servicing the heavy-duty trucks and SUVs used for farming, towing, and commerce. **Average Quality:** The quality is generally high, with shops surviving on reputation and word-of-mouth. The best providers, like those listed, possess deep, practical knowledge of GMC systems. **Competition Level:** Competition is moderate. There are few dedicated GMC specialists, so the top shops are not competing on price but on their specialized expertise and reliability, particularly for diesel and transmission work. **Typical Pricing:** Pricing is typically lower than dealership rates but reflects the specialized skills required. Expect competitive market rates for standard repairs, with a premium for complex diesel engine or transmission work. For a major service like an Allison transmission flush or Duramax injector replacement, customers should expect detailed, upfront estimates.

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 Ulster regulations and climate