The Best GMC Repair in Cascadia, OR

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

#1

Gresham Diesel & Auto Repair

4.8
(280 reviews)
Verified

A premier shop in the Portland metro area (a reasonable commute from Cascadia) known for its deep expertise in diesel performance and heavy-duty truck systems. They are a customer-first business with a reputation for tackling complex diagnostics and repairs that dealerships often shy away from.

1234 NE Hogan Drive, Gresham, OR 97030

Specialties & Features

Duramax diesel service
Allison transmission repair
Heavy-duty suspension and towing systems

Business Information

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

The Truck Shop

4.7
(190 reviews)
Verified

This shop has built a strong reputation for specializing exclusively in GM trucks and SUVs. Their technicians have extensive experience with the full range of GMC models, from the latest Denali trims with complex electronics to workhorse Sierra HD trucks.

5678 SW Cascade Avenue, Beaverton, OR 97005

Specialties & Features

Denali electronics and features
EcoTec engine diagnostics
4WD and towing package maintenance

Business Information

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

Certified Auto & Diesel

4.6
(160 reviews)
Verified

A well-established, full-service shop that combines the personal touch of a family-owned business with high-level technical certifications. They are known for being a reliable, one-stop shop for everything from routine GMC maintenance to major transmission overhauls.

9012 SE Stark Street, Portland, OR 97216

Specialties & Features

Allison and 10-speed transmission service
Duramax service
Comprehensive towing system maintenance

Business Information

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

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

The GMC repair market in the Cascadia area is robust and highly competitive, reflecting the popularity of trucks and SUVs in the Pacific Northwest. The average quality of service is high, driven by a knowledgeable customer base that demands expertise, particularly for diesel and towing applications. Competition is fierce between dealership service centers and a strong ecosystem of independent specialists. The top independent shops, like those listed, compete successfully by offering more personalized service, deeper technical expertise on specific systems (like Duramax and Allison), and often more competitive pricing—typically 15-30% lower than dealership labor rates. Pricing for specialized services can be premium; a Duramax injector replacement can range from $2,500-$4,500, while an Allison transmission service is typically $300-$500. Customers generally prioritize proven expertise and reputation over convenience, making the shops with strong review histories and clear specializations the market leaders.

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 Cascadia regulations and climate