The Best GMC Repair in Lewistown, MT

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

#1

Lewistown Diesel & Auto Repair

4.8
(120 reviews)
Verified

Widely regarded as the premier shop for diesel and heavy-duty truck service in central Montana. They have built a formidable reputation for technical expertise, particularly with complex Duramax and Allison systems. Their technicians are known for methodical diagnostics and are a trusted source for local ranchers, construction crews, and tow operators.

1420 W Main St, Lewistown, MT 59457

Specialties & Features

Duramax diesel service
Allison transmission repair
Heavy-duty truck suspension

Business Information

Years in Business:15 years
Licensed:Yes
Insured:Yes
#2

Central Montana Service Center

4.5
(90 reviews)
Verified

A well-established, full-service garage known for its reliable work and strong customer service. While they service all makes and models, they have dedicated technicians with significant experience on GM vehicles. They are a go-to for general maintenance, EcoTec engine issues, and electronic diagnostics on Denali trims.

520 NE 1st Ave, Lewistown, MT 59457

Specialties & Features

EcoTec engine diagnostics
Denali luxury features and electronics
General GMC maintenance

Business Information

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

Hi-Line Performance & Offroad

4.6
(70 reviews)
Verified

This shop specializes in performance, off-road, and towing applications. They are the top choice for customers who use their GMC trucks for serious towing, plowing, or off-road recreation. Their expertise includes installing and calibrating aftermarket towing packages, upgrading 4WD systems, and performing suspension lifts tailored to heavy-duty GMC models.

801 Washington St, Lewistown, MT 59457

Specialties & Features

4WD and towing system service
Towing package maintenance
Performance suspension upgrades

Business Information

Years in Business:10 years
Licensed:Yes
Insured:Yes

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

** The GMC repair market in Lewistown is characterized by a small number of highly competent, independent shops that have earned their reputation through decades of combined experience. There is no dedicated GMC dealership in Lewistown, which places the responsibility of specialized repair entirely on these independent specialists. The competition is not dense, but it is fierce in terms of quality and reputation. Shops that survive here do so by being exceptionally reliable and knowledgeable, as the community relies heavily on its trucks for both business and daily life. **Average Quality** is high for general mechanical work, but deep, brand-specific expertise (especially for Duramax and Allison systems) is concentrated in just one or two shops, primarily Lewistown Diesel & Auto Repair. **Competition Level** is moderate, with a clear hierarchy based on specialization. Customers with complex diesel or transmission issues have a definitive first choice. **Typical Pricing** is competitive with statewide averages. Labor rates are generally lower than in major Montana cities like Billings or Missoula, but the complexity of the work (e.g., diesel injector replacement, transmission rebuild) commands a premium. Customers report fair pricing relative to the high quality of work and the critical need for dependable vehicle operation in a remote area.

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 Lewistown regulations and climate