The Best GMC Repair in Waynesboro, TN

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

#1

Lewis Motor Company

4.4
(180 reviews)
Verified

As the local, long-standing GMC dealership, Lewis Motor Company is the primary destination for factory-trained service. Their technicians receive direct GM training and have access to the latest technical service bulletins and proprietary diagnostic tools. They are best equipped to handle complex electronics, Denali-specific features, and warranty-related work.

1010 Swan Ave, Waynesboro, TN 38485

Specialties & Features

Denali electronics
features
GMC factory towing packages
EcoTec3 engine diagnostics

Business Information

Years in Business:50 years
Licensed:Yes
Insured:Yes
#2

C & J Auto & Diesel Repair

4.7
(95 reviews)
Verified

A highly-rated independent shop known for its expertise in both gas and diesel engines. Customer reviews consistently praise their honest diagnostics, quality workmanship, and ability to handle complex mechanical issues on American trucks, including heavy-duty suspensions and drivetrain components. They are a top alternative to the dealership for mechanical repairs.

1409 S Main St, Waynesboro, TN 38485

Specialties & Features

Duramax diesel service
Allison transmission repair
heavy-duty suspension

Business Information

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

Savannah Diesel & Auto Repair

4.6
(120 reviews)
Verified

Located in the neighboring city of Savannah, this shop is a dedicated specialist that serves clients from across the region, including Waynesboro. They have built a strong reputation specifically for diesel performance, repair, and transmission work. They are an excellent choice for owners of heavy-duty GMC trucks (2500/3500 series) requiring specialized diesel and transmission service.

1445 Pickwick St, Savannah, TN 38372

Specialties & Features

Duramax diesel performance
repair
Allison transmission overhaul
4WD system service

Business Information

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

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

** The GMC repair market in Waynesboro, TN, reflects its semi-rural setting. The landscape is characterized by one dominant dealership and a handful of highly capable independent shops. **Lewis Motor Company** holds a near-monopoly on factory-direct services, software updates, and warranty work, which dictates their pricing to be at a premium compared to independents. The independent market is small but robust, with shops like **C & J Auto & Diesel** competing on price, personalized service, and deep mechanical expertise. For the most specialized diesel and transmission needs, residents often look to specialists in nearby larger towns like **Savannah**, which has a more industrial and agricultural clientele, supporting shops with advanced diesel capabilities. Overall competition is moderate. Pricing is generally competitive with regional averages, with dealership labor rates being the highest. Customers in this area heavily rely on word-of-mouth and long-term reputation, making a shop's history and owner involvement significant factors for success. For a GMC owner, the choice typically boils down to dealership assurance for complex electronics versus independent value and specialization for powertrain and mechanical work.

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 Waynesboro regulations and climate