The Best GMC Repair in Brewster, WA

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

#1

Valley Auto & Diesel

4.7
(180 reviews)
Verified

A highly respected, family-owned shop known for its deep expertise in diesel engine performance and heavy-duty truck repair. They are the go-to specialists in the area for complex Duramax diagnostics, Allison transmission servicing, and suspension work on 2500/3500 series trucks. Customers frequently praise their honest diagnostics and ability to handle jobs that dealerships outsource.

102 S. 1st St, Brewster, WA 98812

Specialties & Features

Duramax diesel service
Allison transmission repair
Heavy-duty truck suspension

Business Information

Years in Business:18 years
Licensed:Yes
Insured:Yes
#2

Brewster Auto Repair

4.4
(90 reviews)
Verified

A well-established, full-service shop with a strong reputation for general and specialized automotive care. While they service all brands, they have developed significant expertise with GM vehicles, including diagnostics for EcoTec engines and routine maintenance of towing packages and 4WD systems on SUVs like the Acadia and Yukon.

315 W. Indian Ave, Brewster, WA 98812

Specialties & Features

EcoTec engine diagnostics
Towing package maintenance
4WD system service

Business Information

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

Okanogan County Diesel & Auto Repair

4.8
(120 reviews)
Verified

While located just outside the city limits, this shop is a primary service provider for Brewster residents and is renowned for its specialized diesel and transmission work. They are a top-tier choice for major Duramax repairs, including injector and turbo services, and are one of the few local shops equipped for advanced Allison transmission diagnostics and rebuilds. They also handle 4WD and towing system repairs on heavy-duty platforms.

225-A Benson Rd, Brewster, WA 98812 (Located in the industrial area serving Brewster)

Specialties & Features

Duramax diesel service
Allison transmission rebuilds
4WD and towing system service

Business Information

Years in Business:8 years
Licensed:Yes
Insured:Yes

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

** The GMC repair market in Brewster, WA, is characterized by a high demand for competent diesel and heavy-duty truck service, driven by the local agricultural and orchard industries. The competition is not dense in terms of the number of shops, but it is intense in terms of specialization. The average quality of service is high, as shops must be proficient with the complex systems found on modern GM trucks to remain in business. There is a noticeable gap in providers who specialize in the high-end electronics and luxury features of Denali models; customers with these specific needs often travel to larger dealerships in Wenatchee or Moses Lake. Typical pricing for specialized work (e.g., Duramax injector replacement, transmission service) is competitive but reflects the technical expertise required, often being more affordable than dealership rates but commanding a premium over general auto repair.

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 Brewster regulations and climate