The Best GMC Repair in Brentwood, NY

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

#1

All Pro Automotive & Diesel

4.8
(240 reviews)
Verified

A highly respected, family-owned shop known for its deep expertise in both domestic and diesel engines. They are a go-to for complex diagnostics and repairs on GMC trucks, from the 3.0L Duramax to the heavy-duty 2500/3500 series. They invest in advanced diagnostic tools and their technicians regularly update their training.

900 Crooked Hill Rd, Brentwood, NY 11717

Specialties & Features

Duramax diesel service
Allison transmission repair
EcoTec engine diagnostics

Business Information

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

Brentwood Auto Repair

4.5
(180 reviews)
Verified

A well-established local shop with a strong reputation for honesty and reliable service. While they service all makes and models, they have specific technicians with extensive experience on GMC vehicles. They are a strong choice for routine maintenance, suspension work, and electrical diagnostics on Denali models.

1446 Brentwood Rd, Brentwood, NY 11717

Specialties & Features

4WD and towing system service
Denali luxury features and electronics
heavy-duty truck suspension

Business Information

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

Diesel Pickup Specialist

4.9
(150 reviews)
Verified

While technically located just outside Brentwood in Bay Shore, this shop is so specialized and highly recommended that it is considered the premier destination for serious GMC Duramax and Allison transmission work in the region. They focus exclusively on diesel pickups, offering an unparalleled level of expertise.

1065 Sunrise Hwy, Bay Shore, NY 11706

Specialties & Features

Duramax diesel performance
Allison transmission rebuilds
towing package maintenance

Business Information

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

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

** The GMC repair market in Brentwood, NY is robust but stratified. The area is served by numerous general auto repair shops that can handle basic maintenance and common issues on GMC vehicles. However, for the specialized services requested—particularly Duramax diesel, Allison transmissions, and advanced Denali electronics—the field narrows significantly. * **Average Quality:** General repair quality is good, but expertise on complex GMC systems is a premium service. Shops that possess this expertise, like those listed, command a strong reputation and can charge accordingly. * **Competition Level:** High for general auto repair, but low for true GMC and diesel specialization. This creates an opportunity for shops like All Pro Automotive and Diesel Pickup Specialist to dominate the niche market. * **Typical Pricing:** Labor rates are competitive with the Long Island average, generally ranging from **$120 - $180 per hour**. Specialized diesel and transmission work will be at the higher end of this scale. Customers should expect a significant investment for major diesel injector work, transmission overhauls, or complex electrical diagnostics, but this is offset by the high level of expertise required, preventing costly misdiagnoses and repeat repairs.

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 Brentwood regulations and climate