The Best GMC Repair in Miller Place, NY

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

#1

A & S Diesel & Auto Repair Inc.

4.8
(180 reviews)
Verified

A & S is widely regarded as the premier diesel specialist in the area. They have built a formidable reputation specifically on complex engine work, making them the go-to shop for Duramax diagnostics and repair. Their technicians possess deep knowledge of heavy-duty truck systems, from engine performance to the intricate 4WD and towing components found on GMC Sierra HD models.

48 Route 25A, Miller Place, NY 11764

Specialties & Features

Duramax diesel service
Allison transmission repair
Heavy-duty truck suspension

Business Information

Years in Business:15 years
Licensed:Yes
Insured:Yes
#2

Precision Auto & Diesel of Long Island

4.7
(120 reviews)
Verified

Precision Auto & Diesel offers a comprehensive service approach, combining expertise in both diesel powertrains and sophisticated automotive electronics. They receive consistent praise for their diagnostic capabilities, effectively handling EcoTec engine issues and the complex infotainment/comfort systems in GMC Denali trims. Their work on transmissions and towing system maintenance is also highly noted.

224 Route 25A, Miller Place, NY 11764

Specialties & Features

EcoTec engine diagnostics
Denali luxury features and electronics
Towing package maintenance

Business Information

Years in Business:10 years
Licensed:Yes
Insured:Yes
#3

Miller Place Automotive

4.6
(200 reviews)
Verified

As a long-standing, community-focused repair shop, Miller Place Automotive has earned deep trust for general and specialized repairs. While not exclusively a diesel shop, they have significant experience with GM platforms, including transmission services for both Allison and newer 10-speed models, 4WD system maintenance, and general engine diagnostics. They are an excellent choice for routine and complex mechanical repairs on GMC trucks and SUVs.

295 Route 25A, Miller Place, NY 11764

Specialties & Features

Transmission repair (Allison
10-speed)
4WD diagnostics
General GMC service
maintenance

Business Information

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

Why These Are the Top GMC Repair Auto Repair Shops in Miller Place

** The GMC repair market in Miller Place is characterized by a handful of highly specialized, independent shops that compete directly with the larger, more expensive dealerships further west in Smithtown or Medford. The average quality of specialized service is notably high, as these local businesses survive on reputation and word-of-mouth in a tight-knit community. Competition is strong but professional, with shops differentiating themselves through specific niches—A & S with diesel dominance, Precision with advanced diagnostics, and Miller Place Automotive with broad, trusted mechanical expertise. Typical pricing for specialized services like Duramax injector replacement or Allison transmission overhaul is significantly lower than dealership rates but remains a premium service due to the required expertise and equipment. Customers can expect to pay $120-$160 per hour for labor. This market effectively serves the practical needs of local tradespeople, boat owners, and families who rely on their GMC trucks and SUVs for daily use and heavy-duty tasks.

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 Miller Place regulations and climate