The Best GMC Repair in Windsor, IL

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

#1

Mattoon Auto Tech

4.8
(184 reviews)
Verified

A highly-rated, family-owned auto repair shop known for its technical expertise and honest service. They have master technicians on staff with advanced diagnostic equipment, making them a top choice for complex GMC issues, especially with Duramax engines and Allison transmissions. They are a popular alternative to the dealership for significant repairs.

200 N Logan St, Mattoon, IL 61938

Specialties & Features

Duramax diesel service
Allison transmission repair
4WD diagnostics

Business Information

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

Sullivan Tire & Auto Service

4.6
(89 reviews)
Verified

While a tire shop at its core, this established local business has built a strong reputation for general mechanical repair and suspension work. They are a go-to for Windsor residents for routine maintenance, tire services, and suspension repairs on heavy-duty trucks and SUVs, including alignments and lift/leveling kit installations.

4 S Central Ave, Sullivan, IL 61951

Specialties & Features

Heavy-duty truck suspension
EcoTec engine diagnostics
towing package maintenance

Business Information

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

Green GMC Buick Cadillac (Dealership Service Department)

4.3
(275 reviews)
Verified

As the authorized GMC dealership for the region, this is the only provider with factory-trained GMC technicians and direct access to the latest technical service bulletins, specialized tools, and OEM parts. This is the definitive source for warranty work, complex electronics, and diagnosing issues specific to Denali trim levels.

1220 W Morton Ave, Jacksonville, IL 62650

Specialties & Features

Denali luxury features and electronics
GMC factory warranty service
Allison transmission repair

Business Information

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

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

** The GMC repair market in and around Windsor, IL, is characteristic of a rural, agriculturally-based area. The demand for competent diesel and heavy-duty truck service is high due to the prevalence of farming and towing. However, the options are concentrated in the larger neighboring towns like Mattoon, Sullivan, and Jacksonville. * **Average Quality:** The average quality is good, with several long-standing, reputable shops. The presence of a major dealership (Green GMC) within a reasonable driving distance raises the ceiling for specialized service availability. * **Competition Level:** Competition is moderate. There are few dedicated "GMC-only" specialists, so competent general repair shops that have invested in diesel and transmission expertise capture most of the market. The dealership operates in its own tier for brand-specific and warranty work. * **Typical Pricing:** Pricing is generally competitive and often lower than in metropolitan areas. Labor rates are a key differentiator. Independent shops like Mattoon Auto Tech may offer rates 15-25% lower than the dealership, making them a value-conscious choice for major out-of-warranty repairs. For routine services (oil changes, brake jobs), pricing is relatively consistent across providers.

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 Windsor regulations and climate