Top 3 GMC Repair Shops in Oconee

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

#1

J&R Automotive & Diesel Service

4.7
(180 reviews)
Verified

A highly respected, family-owned shop known for its deep expertise in both domestic and diesel vehicles. They are the go-to provider in the region for complex Duramax diagnostics and performance tuning. Their technicians have advanced training and invest in specialized diagnostic tools for modern GMC electronics and transmissions.

1620 E Main St, Shelbyville, IL 62565 (Approx. 10 miles from Oconee)

Specialties & Features

Duramax diesel service
Allison transmission repair
EcoTec engine diagnostics

Business Information

Years in Business:18 years
Licensed:Yes
Insured:Yes
#2

Shelbyville Transmission & Auto Care

4.5
(120 reviews)
Verified

While "Transmission" is in their name, this shop offers comprehensive auto care with a particular reputation for excellence in transmission rebuilds and service, especially for the heavy-duty Allison units found in GMC trucks and SUVs. They also frequently handle 4WD system service and towing package maintenance for local customers who use their trucks for work and recreation.

1401 S Morgan St, Shelbyville, IL 62565 (Approx. 10 miles from Oconee)

Specialties & Features

Allison transmission repair
4WD and towing system service
Heavy-duty truck suspension

Business Information

Years in Business:12 years
Licensed:Yes
Insured:Yes
#3

M&M Service Center

4.3
(90 reviews)
Verified

A well-established, full-service garage with a strong local reputation for honesty and reliable work. They are a strong choice for general GMC maintenance, EcoTec engine work, and suspension services. They cater to a wide range of vehicles but have specific experience with the GMC platform common in the agricultural and rural community.

201 N Cedar St, Findlay, IL 62534 (Approx. 15 miles from Oconee)

Specialties & Features

EcoTec engine diagnostics
Heavy-duty truck suspension
General GMC maintenance

Business Information

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

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

** The GMC repair market in the Oconee, Illinois area is characteristic of a rural, agricultural region. There are no dedicated GMC dealerships within the village itself, creating a robust market for high-quality independent repair shops in nearby towns like Shelbyville and Findlay. The average quality of service is high, as these businesses survive on reputation and word-of-mouth within a close-knit community. Competition is strong among the top independents, who differentiate themselves through specialized certifications (like ASE), investment in proprietary diagnostic tools, and niche expertise (e.g., diesel performance). Typical pricing is competitive with national averages but can be slightly lower than in major metropolitan areas. However, for specialized services like Duramax injector replacement or Allison transmission overhaul, prices are largely dictated by parts costs and the required expertise, making them consistent nationwide. Customers in this area are typically knowledgeable about their trucks and expect durable, no-nonsense repairs from technicians they trust.

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 Oconee regulations and climate