The Best GMC Repair in Coram, NY

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

#1

Smith Haven GMC (A Penske Automotive Group Facility)

4.3
(287 reviews)
Verified

As the primary GMC dealership serving the Coram area, Smith Haven GMC offers the highest level of factory-specific expertise. Their service department is staffed by GM-certified technicians with direct access to the latest technical service bulletins, specialized tools, and genuine GM parts. This is the premier destination for complex electrical issues, warranty work, and maintaining Denali luxury features.

2000 Middle Country Rd, Centereach, NY 11720

Specialties & Features

Denali electronics
features
Allison transmission repair
EcoTec3 engine diagnostics

Business Information

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

Coram Auto & Diesel Repair

4.7
(134 reviews)
Verified

A highly-rated independent shop with a strong reputation for honesty and expertise in both gasoline and diesel engines. Customer reviews frequently highlight their proficiency with Duramax diesel service and heavy-duty truck suspensions. They are a trusted alternative to the dealership for owners of Sierra HD trucks and those requiring specialized towing package maintenance.

126 Middle Country Rd, Coram, NY 11727

Specialties & Features

Duramax diesel service
heavy-duty truck suspension
towing package maintenance

Business Information

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

Miller's Auto Repair & Service Center

4.5
(89 reviews)
Verified

A well-established, family-owned shop known for its comprehensive service capabilities and strong community reputation. While they service all makes and models, they have specific expertise with GM vehicles, including transmission service and 4WD systems. They are a great choice for routine maintenance, transmission flushes, and 4WD system diagnostics on GMC trucks and SUVs.

167 Middle Country Rd, Coram, NY 11727

Specialties & Features

Transmission service (Allison
10-speed)
4WD system service
general GMC maintenance

Business Information

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

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

** The GMC repair market in Coram, NY, is competitive and serves a community with a high number of truck and SUV owners. The quality of service providers is generally good, with a clear distinction between the factory-backed dealership and several reputable independent shops. * **Average Quality:** High. Consumers have access to both factory-certified technicians at the dealership and experienced, ASE-certified mechanics at independents. * **Competition Level:** Moderate to High. The presence of a major dealership (Smith Haven GMC) anchors the market, while several long-standing independents compete on price, personalized service, and specific diesel/heavy-duty expertise. * **Typical Pricing:** Pricing follows a standard tiered structure. The dealership (Smith Haven GMC) commands a premium for OEM parts and factory-specific diagnostics. Independent shops like Coram Auto & Diesel and Miller's typically offer lower labor rates, making them a more cost-effective option for out-of-warranty vehicles and specialized mechanical work, while still providing high-quality service.

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 Coram regulations and climate