Top 3 GMC Repair Shops in Mansfield

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

#1

S & S Diesel & Auto Repair

4.8
(184 reviews)
Verified

A highly regarded, family-owned shop known for its deep expertise in diesel performance and repair, particularly Duramax engines. They are the go-to specialists for complex diagnostics, transmission work, and performance upgrades for heavy-duty trucks. Their reputation for quality work on demanding jobs makes them a top choice.

17178 N 2100th St, Oakland, IL 61943

Specialties & Features

Duramax diesel service
Allison transmission repair
Heavy-duty truck suspension

Business Information

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

A & M Diesel Service Inc.

4.6
(87 reviews)
Verified

A well-established business with a strong focus on diesel engine and transmission service for agricultural and personal trucks. They have a long track record of reliability and are known for tackling major engine and drivetrain repairs. Their expertise is particularly valued for towing and work vehicles.

16112 N 1775th St, Oakland, IL 61943

Specialties & Features

Diesel engine service
Transmission repair
Towing package maintenance

Business Information

Years in Business:25 years
Licensed:Yes
Insured:Yes
#3

O'Brien GMC Truck Center

4.3
(279 reviews)
Verified

As the nearest authorized GMC dealership, O'Brien offers factory-trained technicians, genuine GM parts, and direct access to the latest technical service bulletins. This is the premier destination for warranty work, complex electronics, Denali luxury feature diagnosis, and factory-recalled repairs that require proprietary software.

301 W Springfield Ave, Champaign, IL 61820

Specialties & Features

Denali luxury features and electronics
EcoTec engine diagnostics
Factory-spec transmission service

Business Information

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

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

** The GMC repair market serving Mansfield, IL, is characterized by a reliance on specialized shops in neighboring towns, primarily Oakland and the larger hub of Champaign. Due to Mansfield's size and rural nature, there is no local competition among dedicated GMC specialists. The market quality is bifurcated: residents have access to high-caliber independent diesel specialists (like S & S and A & M) for powertrain and heavy-duty work, and a full-service dealership (O'Brien) for warranty and advanced electronics. **Average Quality:** The quality is high, as the shops that survive in this agricultural and truck-dependent region build their reputation on competence and reliability. **Competition Level:** Low within Mansfield itself, but moderate among the regional specialists who compete for the same customer base of truck and SUV owners. **Typical Pricing:** Independent shops generally offer more competitive labor rates ($110-$140/hr) compared to the dealership ($150-$170/hr). However, for specialized diesel and transmission work, the independents' expertise often commands a premium, aligning their pricing closer to dealership levels for those specific services.

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 Mansfield regulations and climate