The Best GMC Repair in Mastic, NY
Compare the highest-rated gmc repair mechanics in Mastic, New York. All shops are licensed, insured, and verified through our rigorous screening process.
All Diesel & Auto Repair
Widely regarded as the premier diesel specialist in the immediate area. While not located directly in Mastic, they are the go-to shop for residents for complex Duramax diagnostics, performance tuning, and major repairs. Their expertise extends to the Allison transmissions behind these engines, making them a top choice for heavy-duty GMC owners.
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Mastic Auto Repair & Service Center
A well-established and highly trusted local shop with deep roots in the community. They have a strong reputation for general GMC service, including EcoTec engine work, routine towing package maintenance, and 4WD system service. They are known for honest diagnostics and are a reliable option for Denali owners needing electronic and comfort system repairs.
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A-1 Transmission Experts
As the name implies, this provider is a specialist in transmission systems. They are one of the few shops in the region with specific, recognized expertise in the GM 10-speed automatic and Allison transmission families. For any GMC owner experiencing transmission issues, from a Sierra 1500 to a heavy-duty 3500, this is the most technically proficient option.
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Why These Are the Top GMC Repair Auto Repair Shops in Mastic
** The GMC repair market in Mastic is characterized by a mix of long-standing general auto repair shops and a necessary reliance on nearby specialists for complex drivetrain work. The average quality of service is good for routine maintenance, but for specialized areas like Duramax diesel or advanced transmission repair, the highest-caliber expertise is concentrated in a handful of reputable businesses in Shirley and the wider Brookhaven area. Competition is moderate, which helps keep labor rates reasonable compared to dealerships. Typical pricing for independent shops in this region ranges from $120-$150 per hour for labor. Consumers are advised to seek out specialists for their specific needs, as the technical complexity of modern GMC trucks, especially Denali trim levels and diesel models, exceeds the capability of many general-purpose mechanics. The most successful shops have differentiated themselves by investing in proprietary diagnostic tools and continuous technician training for GM platforms.
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 Mastic regulations and climate