The Best GMC Repair in Ontario, OR

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

#1

Ontario Truck & Auto Repair

4.7
(180 reviews)
Verified

Widely regarded as the leading shop in the area for heavy-duty and diesel truck service. They have built a strong reputation for technical expertise on complex drivetrain and engine systems. Customers frequently praise their ability to diagnose and repair issues that other shops couldn't, particularly with Duramax engines and Allison transmissions.

1737 SW 4th Ave, Ontario, OR 97914

Specialties & Features

Duramax diesel service
Allison transmission repair
heavy-duty suspension systems

Business Information

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

Certified Auto Specialists

4.5
(120 reviews)
Verified

A well-established, family-owned shop known for its diagnostic capabilities and customer service. They invest in ongoing technician training and modern diagnostic equipment, making them a strong choice for intricate electrical issues, EcoTec engine diagnostics, and maintaining the luxury features of Denali models.

445 SE 1st St, Ontario, OR 97914

Specialties & Features

EcoTec engine diagnostics
Denali electronics
towing package maintenance

Business Information

Years in Business:20 years
Licensed:Yes
Insured:Yes
#3

Tran's Automotive

4.3
(90 reviews)
Verified

A trusted local provider with a long history in the community. While they service all makes and models, they have specific expertise in GM products and are a reliable option for general GMC maintenance, 4WD service, and transmission work. They are often noted for their straightforward communication and fair pricing.

28 SW 3rd Ave, Ontario, OR 97914

Specialties & Features

4WD system service
transmission repair
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 Ontario

** The GMC repair market in Ontario, Oregon, is characterized by a handful of highly capable independent shops that have earned strong local reputations, rather than a high volume of competition. As a key agricultural and logistics hub for the region, there is significant demand for expertise in diesel and heavy-duty truck repair. **Average Quality:** The quality is generally high among the top-tier independents, who compete directly with the local GMC dealership (Cory Farran Motors) by offering more specialized, personalized service and often more competitive labor rates. **Competition Level:** Competition is moderate but specialized. For basic maintenance, there are numerous options, but for the complex specialties you've listed (Duramax, Allison, advanced electronics), the field narrows significantly to the shops identified above. These providers have differentiated themselves through deep technical knowledge and long-term community presence. **Typical Pricing:** Pricing is competitive for a rural market. Labor rates are generally lower than in major metropolitan areas but can be higher for diesel and transmission specialists due to the required expertise and equipment. Expect a premium for diagnostic time on complex electronic and emissions systems. It is always recommended to request a detailed estimate upfront.

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 Ontario regulations and climate